Merge pull request #12012 from greg0ire/revert-allfields-dto

Revert "add capability to use allfields sql notation"

.doctrine-project.json

@@ -11,17 +11,23 @@
             "slug": "latest",
             "upcoming": true
         },
+        {
+            "name": "3.5",
+            "branchName": "3.5.x",
+            "slug": "3.5",
+            "upcoming": true
+        },
         {
             "name": "3.4",
             "branchName": "3.4.x",
             "slug": "3.4",
-            "upcoming": true
+            "current": true
         },
         {
             "name": "3.3",
             "branchName": "3.3.x",
             "slug": "3.3",
-            "current": true
+            "maintained": false
         },
         {
             "name": "3.2",

.github/workflows/continuous-integration.yml

@@ -43,17 +43,27 @@ jobs:
           - "pdo_sqlite"
         deps:
           - "highest"
+        native_lazy:
+          - "0"
         include:
           - php-version: "8.2"
             dbal-version: "4@dev"
             extension: "pdo_sqlite"
+            native_lazy: "0"
           - php-version: "8.2"
             dbal-version: "4@dev"
             extension: "sqlite3"
+            native_lazy: "0"
           - php-version: "8.1"
             dbal-version: "default"
             deps: "lowest"
             extension: "pdo_sqlite"
+            native_lazy: "0"
+          - php-version: "8.4"
+            dbal-version: "default"
+            deps: "highest"
+            extension: "pdo_sqlite"
+            native_lazy: "1"
 
     steps:
       - name: "Checkout"
@@ -83,16 +93,18 @@ jobs:
         run: "vendor/bin/phpunit -c ci/github/phpunit/${{ matrix.extension }}.xml --coverage-clover=coverage-no-cache.xml"
         env:
             ENABLE_SECOND_LEVEL_CACHE: 0
+            ENABLE_NATIVE_LAZY_OBJECTS: ${{ matrix.native_lazy }}
 
       - name: "Run PHPUnit with Second Level Cache"
         run: "vendor/bin/phpunit -c ci/github/phpunit/${{ matrix.extension }}.xml --exclude-group performance,non-cacheable,locking_functional --coverage-clover=coverage-cache.xml"
         env:
             ENABLE_SECOND_LEVEL_CACHE: 1
+            ENABLE_NATIVE_LAZY_OBJECTS: ${{ matrix.native_lazy }}
 
       - name: "Upload coverage file"
         uses: "actions/upload-artifact@v4"
         with:
-          name: "phpunit-${{ matrix.extension }}-${{ matrix.php-version }}-${{ matrix.dbal-version }}-${{ matrix.deps }}-coverage"
+          name: "phpunit-${{ matrix.extension }}-${{ matrix.php-version }}-${{ matrix.dbal-version }}-${{ matrix.deps }}-${{ matrix.native_lazy }}-coverage"
           path: "coverage*.xml"
 
 

README.md

@@ -1,7 +1,7 @@
-|                      [4.0.x][4.0]                      |                      [3.4.x][3.4]                      |                      [3.3.x][3.3]                      |                      [2.21.x][2.21]                      |                      [2.20.x][2.20]                      |
+|                      [4.0.x][4.0]                      |                      [3.5.x][3.5]                      |                      [3.4.x][3.4]                      |                      [2.21.x][2.21]                      |                      [2.20.x][2.20]                      |
 |:------------------------------------------------------:|:------------------------------------------------------:|:------------------------------------------------------:|:--------------------------------------------------------:|:--------------------------------------------------------:|
-|           [![Build status][4.0 image]][4.0]            |           [![Build status][3.4 image]][3.4]            |           [![Build status][3.3 image]][3.3]            |           [![Build status][2.21 image]][2.21]            |           [![Build status][2.20 image]][2.20]            |
-| [![Coverage Status][4.0 coverage image]][4.0 coverage] | [![Coverage Status][3.4 coverage image]][3.4 coverage] | [![Coverage Status][3.3 coverage image]][3.3 coverage] | [![Coverage Status][2.21 coverage image]][2.21 coverage] | [![Coverage Status][2.20 coverage image]][2.20 coverage] |
+|           [![Build status][4.0 image]][4.0]            |           [![Build status][3.5 image]][3.5]            |           [![Build status][3.4 image]][3.4]            |           [![Build status][2.21 image]][2.21]            |           [![Build status][2.20 image]][2.20]            |
+| [![Coverage Status][4.0 coverage image]][4.0 coverage] | [![Coverage Status][3.5 coverage image]][3.5 coverage] | [![Coverage Status][3.4 coverage image]][3.4 coverage] | [![Coverage Status][2.21 coverage image]][2.21 coverage] | [![Coverage Status][2.20 coverage image]][2.20 coverage] |
 
 Doctrine ORM is an object-relational mapper for PHP 8.1+ that provides transparent persistence
 for PHP objects. It sits on top of a powerful database abstraction layer (DBAL). One of its key features
@@ -20,14 +20,14 @@ without requiring unnecessary code duplication.
   [4.0]: https://github.com/doctrine/orm/tree/4.0.x
   [4.0 coverage image]: https://codecov.io/gh/doctrine/orm/branch/4.0.x/graph/badge.svg
   [4.0 coverage]: https://codecov.io/gh/doctrine/orm/branch/4.0.x
+  [3.5 image]: https://github.com/doctrine/orm/actions/workflows/continuous-integration.yml/badge.svg?branch=3.5.x
+  [3.5]: https://github.com/doctrine/orm/tree/3.5.x
+  [3.5 coverage image]: https://codecov.io/gh/doctrine/orm/branch/3.5.x/graph/badge.svg
+  [3.5 coverage]: https://codecov.io/gh/doctrine/orm/branch/3.5.x
   [3.4 image]: https://github.com/doctrine/orm/actions/workflows/continuous-integration.yml/badge.svg?branch=3.4.x
   [3.4]: https://github.com/doctrine/orm/tree/3.4.x
   [3.4 coverage image]: https://codecov.io/gh/doctrine/orm/branch/3.4.x/graph/badge.svg
   [3.4 coverage]: https://codecov.io/gh/doctrine/orm/branch/3.4.x
-  [3.3 image]: https://github.com/doctrine/orm/actions/workflows/continuous-integration.yml/badge.svg?branch=3.3.x
-  [3.3]: https://github.com/doctrine/orm/tree/3.3.x
-  [3.3 coverage image]: https://codecov.io/gh/doctrine/orm/branch/3.3.x/graph/badge.svg
-  [3.3 coverage]: https://codecov.io/gh/doctrine/orm/branch/3.3.x
   [2.21 image]: https://github.com/doctrine/orm/actions/workflows/continuous-integration.yml/badge.svg?branch=2.21.x
   [2.21]: https://github.com/doctrine/orm/tree/2.21.x
   [2.21 coverage image]: https://codecov.io/gh/doctrine/orm/branch/2.21.x/graph/badge.svg

UPGRADE.md

@@ -1,8 +1,28 @@
+# Upgrade to 3.4.1
+
+## BC BREAK: You can no longer use the `.*` notation to get all fields of an entity in a DTO
+
+This feature was introduced in 3.4.0, and introduces several issues, so we
+decide to remove it before it is used too widely.
+
 # Upgrade to 3.4
 
+## Discriminator Map class duplicates
+
 Using the same class several times in a discriminator map is deprecated.
 In 4.0, this will be an error.
 
+## `Doctrine\ORM\Mapping\ClassMetadata::$reflFields` deprecated
+
+To better support property hooks and lazy proxies in the future, `$reflFields` had to
+be deprecated because we cannot use the PHP internal reflection API directly anymore.
+
+The property was changed from an array to an object of type `LegacyReflectionFields`
+that implements `ArrayAccess`.
+
+Use the new `Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessor` API and access
+through `Doctrine\ORM\Mapping\ClassMetadata::$propertyAccessors` instead.
+
 # Upgrade to 3.3
 
 ## Deprecate `DatabaseDriver`
@@ -13,7 +33,7 @@ The class `Doctrine\ORM\Mapping\Driver\DatabaseDriver` is deprecated without rep
 
 Output walkers should implement the new `\Doctrine\ORM\Query\OutputWalker` interface and create
 `Doctrine\ORM\Query\Exec\SqlFinalizer` instances instead of `Doctrine\ORM\Query\Exec\AbstractSqlExecutor`s.
-The output walker must not base its workings on the query `firstResult`/`maxResult` values, so that the 
+The output walker must not base its workings on the query `firstResult`/`maxResult` values, so that the
 `SqlFinalizer` can be kept in the query cache and used regardless of the actual `firstResult`/`maxResult` values.
 Any operation dependent on `firstResult`/`maxResult` should take place within the `SqlFinalizer::createExecutor()`
 method. Details can be found at https://github.com/doctrine/orm/pull/11188.
@@ -124,7 +144,7 @@ WARNING: This was relaxed in ORM 3.2 when partial was re-allowed for array-hydra
   `Doctrine\ORM\Query::HINT_FORCE_PARTIAL_LOAD` are removed.
 - `Doctrine\ORM\EntityManager*::getPartialReference()` is removed.
 
-## BC BREAK: Enforce ArrayCollection Type on `\Doctrine\ORM\QueryBuilder::setParameters(ArrayCollection $parameters)` 
+## BC BREAK: Enforce ArrayCollection Type on `\Doctrine\ORM\QueryBuilder::setParameters(ArrayCollection $parameters)`
 
 The argument $parameters can no longer be a key=>value array. Only ArrayCollection types are allowed.
 

docs/en/reference/advanced-configuration.rst

@@ -19,7 +19,7 @@ steps of configuration.
 
     // ...
 
-    if ($applicationMode == "development") {
+    if ($applicationMode === "development") {
         $queryCache = new ArrayAdapter();
         $metadataCache = new ArrayAdapter();
     } else {
@@ -32,13 +32,18 @@ steps of configuration.
     $driverImpl = new AttributeDriver(['/path/to/lib/MyProject/Entities'], true);
     $config->setMetadataDriverImpl($driverImpl);
     $config->setQueryCache($queryCache);
-    $config->setProxyDir('/path/to/myproject/lib/MyProject/Proxies');
-    $config->setProxyNamespace('MyProject\Proxies');
 
-    if ($applicationMode == "development") {
-        $config->setAutoGenerateProxyClasses(true);
+    if (PHP_VERSION_ID > 80400) {
+        $config->enableNativeLazyObjects(true);
     } else {
-        $config->setAutoGenerateProxyClasses(false);
+        $config->setProxyDir('/path/to/myproject/lib/MyProject/Proxies');
+        $config->setProxyNamespace('MyProject\Proxies');
+
+        if ($applicationMode === "development") {
+            $config->setAutoGenerateProxyClasses(true);
+        } else {
+            $config->setAutoGenerateProxyClasses(false);
+        }
     }
 
     $connection = DriverManager::getConnection([
@@ -71,8 +76,25 @@ Configuration Options
 The following sections describe all the configuration options
 available on a ``Doctrine\ORM\Configuration`` instance.
 
-Proxy Directory (**REQUIRED**)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Native Lazy Objects (**OPTIONAL**)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+With PHP 8.4 we recommend that you use native lazy objects instead of
+the code generation approach using the ``symfony/var-exporter`` Ghost trait.
+
+With Doctrine 4, the minimal requirement will become PHP 8.4 and native lazy objects
+will become the only approach to lazy loading.
+
+.. code-block:: php
+
+    <?php
+    $config->enableNativeLazyObjects(true);
+
+Proxy Directory
+~~~~~~~~~~~~~~~
+
+Required except if you use native lazy objects with PHP 8.4.
+This setting will be removed in the future.
 
 .. code-block:: php
 
@@ -85,8 +107,11 @@ classes. For a detailed explanation on proxy classes and how they
 are used in Doctrine, refer to the "Proxy Objects" section further
 down.
 
-Proxy Namespace (**REQUIRED**)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Proxy Namespace
+~~~~~~~~~~~~~~~
+
+Required except if you use native lazy objects with PHP 8.4.
+This setting will be removed in the future.
 
 .. code-block:: php
 
@@ -200,6 +225,9 @@ deprecated ``Doctrine\DBAL\Logging\SQLLogger`` interface.
 Auto-generating Proxy Classes (**OPTIONAL**)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+This setting is not required if you use native lazy objects with PHP 8.4
+and will be removed in the future.
+
 Proxy classes can either be generated manually through the Doctrine
 Console or automatically at runtime by Doctrine. The configuration
 option that controls this behavior is:

docs/en/reference/attributes-reference.rst

@@ -676,6 +676,7 @@ Optional parameters:
 -  **unique**: Determines whether this relation is exclusive between the
    affected entities and should be enforced as such on the database
    constraint level. Defaults to false.
+-  **deferrable**: Determines whether this relation constraint can be deferred. Defaults to false.
 -  **nullable**: Determine whether the related entity is required, or if
    null is an allowed state for the relation. Defaults to true.
 -  **onDelete**: Cascade Action (Database-level)

docs/en/reference/basic-mapping.rst

@@ -214,6 +214,8 @@ These are the "automatic" mapping rules:
 | Any other type        | ``Types::STRING``             |
 +-----------------------+-------------------------------+
 
+.. versionadded:: 2.11
+
 As of version 2.11 Doctrine can also automatically map typed properties using a
 PHP 8.1 enum to set the right ``type`` and ``enumType``.
 
@@ -224,6 +226,70 @@ and a custom ``Doctrine\ORM\Mapping\TypedFieldMapper`` implementation.
 
 :doc:`Read more about TypedFieldMapper <typedfieldmapper>`.
 
+Property Hooks
+--------------
+
+.. versionadded:: 3.4
+
+Doctrine supports mapping hooked properties as long as they have a backed property
+and are not virtual.
+
+
+.. configuration-block::
+
+    .. code-block:: attribute
+
+        <?php
+        use Doctrine\ORM\Mapping\Column;
+        use Doctrine\DBAL\Types\Types;
+
+        #[Entity]
+        class Message
+        {
+            #[Column(type: Types::INTEGER)]
+            private $id;
+            #[Column(type: Types::STRING)]
+            public string $language = 'de' {
+                // Override the "read" action with arbitrary logic.
+                get => strtoupper($this->language);
+
+                // Override the "write" action with arbitrary logic.
+                set {
+                    $this->language = strtolower($value);
+                }
+            }
+        }
+
+    .. code-block:: xml
+
+        <doctrine-mapping>
+          <entity name="Message">
+            <field name="id" type="integer" />
+            <field name="language" />
+          </entity>
+        </doctrine-mapping>
+
+If you attempt to map a virtual property with ``#[Column]`` an exception will be thrown.
+
+Some caveats apply to the use of property hooks, as they behave differently when accessing the property through
+the entity or directly through DQL/EntityRepository. Because the property hook can modify the value of the property in a way
+that value and raw value are different, you have to use the raw value representation when querying for the property.
+
+.. code-block:: php
+
+    <?php
+    $queryBuilder = $entityManager->createQueryBuilder();
+    $queryBuilder->select('m')
+        ->from(Message::class, 'm')
+        ->where('m.language = :language')
+        ->setParameter('language', 'de'); // Use lower case here for raw value representation
+
+    $query = $queryBuilder->getQuery();
+    $result = $query->getResult();
+
+    $messageRepository = $entityManager->getRepository(Message::class);
+    $deMessages = $messageRepository->findBy(['language' => 'de']); // Use lower case here for raw value representation
+
 .. _reference-mapping-types:
 
 Doctrine Mapping Types

docs/en/reference/dql-doctrine-query-language.rst

@@ -588,7 +588,7 @@ And then use the ``NEW`` DQL keyword :
     $query = $em->createQuery('SELECT NEW CustomerDTO(c.name, e.email, a.city, SUM(o.value)) FROM Customer c JOIN c.email e JOIN c.address a JOIN c.orders o GROUP BY c');
     $users = $query->getResult(); // array of CustomerDTO
 
-You can also nest several DTO : 
+You can also nest several DTO :
 
 .. code-block:: php
 
@@ -674,6 +674,16 @@ The ``NAMED`` keyword must precede all DTO you want to instantiate :
 If two arguments have the same name, a ``DuplicateFieldException`` is thrown.
 If a field cannot be matched with a property name, a ``NoMatchingPropertyException`` is thrown. This typically happens when using functions without aliasing them.
 
+You can hydrate an entity nested in a DTO :
+
+.. code-block:: php
+
+    <?php
+    $query = $em->createQuery('SELECT NEW CustomerDTO(c.name, a AS address) FROM Customer c JOIN c.address a');
+    $users = $query->getResult(); // array of CustomerDTO
+
+    // CustomerDTO => {name : 'DOE', email: null, address : {city: 'New York', zip: '10011', address: 'Abbey Road'}
+
 Using INDEX BY
 ~~~~~~~~~~~~~~
 
@@ -1697,12 +1707,13 @@ Select Expressions
 
 .. code-block:: php
 
-    SelectExpression        ::= (IdentificationVariable | ScalarExpression | AggregateExpression | FunctionDeclaration | PartialObjectExpression | "(" Subselect ")" | CaseExpression | NewObjectExpression) [["AS"] ["HIDDEN"] AliasResultVariable]
-    SimpleSelectExpression  ::= (StateFieldPathExpression | IdentificationVariable | FunctionDeclaration | AggregateExpression | "(" Subselect ")" | ScalarExpression) [["AS"] AliasResultVariable]
-    PartialObjectExpression ::= "PARTIAL" IdentificationVariable "." PartialFieldSet
-    PartialFieldSet         ::= "{" SimpleStateField {"," SimpleStateField}* "}"
-    NewObjectExpression     ::= "NEW" AbstractSchemaName "(" NewObjectArg {"," NewObjectArg}* ")"
-    NewObjectArg            ::= (ScalarExpression | "(" Subselect ")" | NewObjectExpression) ["AS" AliasResultVariable]
+    SelectExpression              ::= (IdentificationVariable | ScalarExpression | AggregateExpression | FunctionDeclaration | PartialObjectExpression | "(" Subselect ")" | CaseExpression | NewObjectExpression) [["AS"] ["HIDDEN"] AliasResultVariable]
+    SimpleSelectExpression        ::= (StateFieldPathExpression | IdentificationVariable | FunctionDeclaration | AggregateExpression | "(" Subselect ")" | ScalarExpression) [["AS"] AliasResultVariable]
+    PartialObjectExpression       ::= "PARTIAL" IdentificationVariable "." PartialFieldSet
+    PartialFieldSet               ::= "{" SimpleStateField {"," SimpleStateField}* "}"
+    NewObjectExpression           ::= "NEW" AbstractSchemaName "(" NewObjectArg {"," NewObjectArg}* ")"
+    NewObjectArg                  ::= (ScalarExpression | "(" Subselect ")" | NewObjectExpression | EntityAsDtoArgumentExpression) ["AS" AliasResultVariable]
+    EntityAsDtoArgumentExpression ::= IdentificationVariable
 
 Conditional Expressions
 ~~~~~~~~~~~~~~~~~~~~~~~

phpstan-baseline.neon

@@ -583,7 +583,7 @@ parameters:
 			path: src/EntityManager.php
 
 		-
-			message: '#^Method Doctrine\\ORM\\EntityManager\:\:getReference\(\) should return \(T of object\)\|null but returns Doctrine\\ORM\\Proxy\\InternalProxy\.$#'
+			message: '#^Method Doctrine\\ORM\\EntityManager\:\:getReference\(\) should return \(T of object\)\|null but returns object\.$#'
 			identifier: return.type
 			count: 1
 			path: src/EntityManager.php
@@ -984,12 +984,6 @@ parameters:
 			count: 1
 			path: src/Mapping/ClassMetadata.php
 
-		-
-			message: '#^Parameter \#1 \$class of method Doctrine\\Persistence\\Mapping\\ReflectionService\:\:getAccessibleProperty\(\) expects class\-string, string given\.$#'
-			identifier: argument.type
-			count: 1
-			path: src/Mapping/ClassMetadata.php
-
 		-
 			message: '#^Parameter \#1 \$mapping of method Doctrine\\ORM\\Mapping\\ClassMetadata\<T of object\>\:\:validateAndCompleteTypedAssociationMapping\(\) expects array\{type\: 1\|2\|4\|8, fieldName\: string, targetEntity\?\: class\-string\}, non\-empty\-array\<string, mixed\> given\.$#'
 			identifier: argument.type
@@ -1032,18 +1026,6 @@ parameters:
 			count: 2
 			path: src/Mapping/ClassMetadata.php
 
-		-
-			message: '#^Parameter \#2 \$class of method Doctrine\\ORM\\Mapping\\ClassMetadata\<T of object\>\:\:getAccessibleProperty\(\) expects class\-string, string given\.$#'
-			identifier: argument.type
-			count: 1
-			path: src/Mapping/ClassMetadata.php
-
-		-
-			message: '#^Parameter \#3 \$embeddedClass of class Doctrine\\ORM\\Mapping\\ReflectionEmbeddedProperty constructor expects class\-string, string given\.$#'
-			identifier: argument.type
-			count: 1
-			path: src/Mapping/ClassMetadata.php
-
 		-
 			message: '#^Property Doctrine\\ORM\\Mapping\\ClassMetadata\:\:\$customRepositoryClassName with generic class Doctrine\\ORM\\EntityRepository does not specify its types\: T$#'
 			identifier: missingType.generics
@@ -1578,12 +1560,36 @@ parameters:
 			count: 1
 			path: src/Mapping/JoinTableMapping.php
 
+		-
+			message: '#^Method Doctrine\\ORM\\Mapping\\LegacyReflectionFields\:\:__construct\(\) has parameter \$classMetadata with generic class Doctrine\\ORM\\Mapping\\ClassMetadata but does not specify its types\: T$#'
+			identifier: missingType.generics
+			count: 1
+			path: src/Mapping/LegacyReflectionFields.php
+
+		-
+			message: '#^Parameter \#1 \$class of method Doctrine\\Persistence\\Mapping\\ReflectionService\:\:getAccessibleProperty\(\) expects class\-string, string given\.$#'
+			identifier: argument.type
+			count: 1
+			path: src/Mapping/LegacyReflectionFields.php
+
 		-
 			message: '#^Method Doctrine\\ORM\\Mapping\\MappedSuperclass\:\:__construct\(\) has parameter \$repositoryClass with generic class Doctrine\\ORM\\EntityRepository but does not specify its types\: T$#'
 			identifier: missingType.generics
 			count: 1
 			path: src/Mapping/MappedSuperclass.php
 
+		-
+			message: '#^Method Doctrine\\ORM\\Mapping\\PropertyAccessors\\EnumPropertyAccessor\:\:toEnum\(\) should return array\<BackedEnum\>\|BackedEnum but returns array\<BackedEnum\|int\|string\>\.$#'
+			identifier: return.type
+			count: 1
+			path: src/Mapping/PropertyAccessors/EnumPropertyAccessor.php
+
+		-
+			message: '#^Parameter \#1 \$callback of function array_map expects \(callable\(BackedEnum\|int\|string\)\: mixed\)\|null, array\{class\-string\<BackedEnum\>, ''from''\} given\.$#'
+			identifier: argument.type
+			count: 1
+			path: src/Mapping/PropertyAccessors/EnumPropertyAccessor.php
+
 		-
 			message: '#^Method Doctrine\\ORM\\Mapping\\QuoteStrategy\:\:getColumnAlias\(\) has parameter \$class with generic class Doctrine\\ORM\\Mapping\\ClassMetadata but does not specify its types\: T$#'
 			identifier: missingType.generics
@@ -2394,12 +2400,6 @@ parameters:
 			count: 1
 			path: src/Proxy/ProxyFactory.php
 
-		-
-			message: '#^Method Doctrine\\ORM\\Proxy\\ProxyFactory\:\:getProxy\(\) return type with generic interface Doctrine\\ORM\\Proxy\\InternalProxy does not specify its types\: T$#'
-			identifier: missingType.generics
-			count: 1
-			path: src/Proxy/ProxyFactory.php
-
 		-
 			message: '#^Method Doctrine\\ORM\\Proxy\\ProxyFactory\:\:loadProxyClass\(\) has parameter \$class with generic interface Doctrine\\Persistence\\Mapping\\ClassMetadata but does not specify its types\: T$#'
 			identifier: missingType.generics
@@ -2868,12 +2868,6 @@ parameters:
 			count: 1
 			path: src/Query/SqlWalker.php
 
-		-
-			message: '#^Property Doctrine\\ORM\\Query\\SqlWalker\:\:\$selectedClasses \(array\<string, array\{class\: Doctrine\\ORM\\Mapping\\ClassMetadata, dqlAlias\: string, resultAlias\: string\|null\}\>\) does not accept non\-empty\-array\<int\|string, array\{class\: Doctrine\\ORM\\Mapping\\ClassMetadata, dqlAlias\: mixed, resultAlias\: string\|null\}\>\.$#'
-			identifier: assign.propertyType
-			count: 1
-			path: src/Query/SqlWalker.php
-
 		-
 			message: '#^Property Doctrine\\ORM\\Query\\SqlWalker\:\:\$selectedClasses with generic class Doctrine\\ORM\\Mapping\\ClassMetadata does not specify its types\: T$#'
 			identifier: missingType.generics

phpstan.neon

@@ -45,7 +45,7 @@ parameters:
             path: src/UnitOfWork.php
 
         -
-            message: '~^Parameter #1 \$command of method Symfony\\Component\\Console\\Application::add\(\) expects Symfony\\Component\\Console\\Command\\Command, Doctrine\\DBAL\\Tools\\Console\\Command\\ReservedWordsCommand given\.$~'
+            message: '~^Parameter #2 \$command of static method Doctrine\\ORM\\Tools\\Console\\ConsoleRunner::addCommandToApplication\(\) expects Symfony\\Component\\Console\\Command\\Command, Doctrine\\DBAL\\Tools\\Console\\Command\\ReservedWordsCommand given\.$~'
             path: src/Tools/Console/ConsoleRunner.php
 
         -

src/Configuration.php

@@ -30,6 +30,8 @@ use function class_exists;
 use function is_a;
 use function strtolower;
 
+use const PHP_VERSION_ID;
+
 /**
  * Configuration container for all configuration options of Doctrine.
  * It combines all configuration options from DBAL & ORM.
@@ -593,6 +595,20 @@ class Configuration extends \Doctrine\DBAL\Configuration
         $this->attributes['schemaIgnoreClasses'] = $schemaIgnoreClasses;
     }
 
+    public function isNativeLazyObjectsEnabled(): bool
+    {
+        return $this->attributes['nativeLazyObjects'] ?? false;
+    }
+
+    public function enableNativeLazyObjects(bool $nativeLazyObjects): void
+    {
+        if (PHP_VERSION_ID < 80400) {
+            throw new LogicException('Lazy loading proxies require PHP 8.4 or higher.');
+        }
+
+        $this->attributes['nativeLazyObjects'] = $nativeLazyObjects;
+    }
+
     /**
      * To be deprecated in 3.1.0
      *

src/Internal/Hydration/AbstractHydrator.php

@@ -19,6 +19,7 @@ use LogicException;
 use ReflectionClass;
 
 use function array_key_exists;
+use function array_keys;
 use function array_map;
 use function array_merge;
 use function count;
@@ -348,14 +349,29 @@ abstract class AbstractHydrator
             }
         }
 
+        $nestedEntities = [];
+        /**@var string $argAlias */
         foreach ($this->resultSetMapping()->nestedNewObjectArguments as ['ownerIndex' => $ownerIndex, 'argIndex' => $argIndex, 'argAlias' => $argAlias]) {
             if (array_key_exists($argAlias, $rowData['newObjects'])) {
                 ksort($rowData['newObjects'][$argAlias]['args']);
                 $rowData['newObjects'][$ownerIndex]['args'][$argIndex] = $rowData['newObjects'][$argAlias]['class']->newInstanceArgs($rowData['newObjects'][$argAlias]['args']);
                 unset($rowData['newObjects'][$argAlias]);
+            } elseif (array_key_exists($argAlias, $rowData['data'])) {
+                if (! array_key_exists($argAlias, $nestedEntities)) {
+                    $nestedEntities[$argAlias]  = '';
+                    $rowData['data'][$argAlias] = $this->hydrateNestedEntity($rowData['data'][$argAlias], $argAlias);
+                }
+
+                $rowData['newObjects'][$ownerIndex]['args'][$argIndex] = $rowData['data'][$argAlias];
+            } else {
+                throw new LogicException($argAlias . ' does not exist');
             }
         }
 
+        foreach (array_keys($nestedEntities) as $entity) {
+            unset($rowData['data'][$entity]);
+        }
+
         foreach ($rowData['newObjects'] as $objIndex => $newObject) {
             ksort($rowData['newObjects'][$objIndex]['args']);
             $obj = $rowData['newObjects'][$objIndex]['class']->newInstanceArgs($rowData['newObjects'][$objIndex]['args']);
@@ -366,6 +382,12 @@ abstract class AbstractHydrator
         return $rowData;
     }
 
+    /** @param mixed[] $data pre-hydrated SQL Result Row. */
+    protected function hydrateNestedEntity(array $data, string $dqlAlias): mixed
+    {
+        return $data;
+    }
+
     /**
      * Processes a row of the result set.
      *

src/Internal/Hydration/ObjectHydrator.php

@@ -70,6 +70,10 @@ class ObjectHydrator extends AbstractHydrator
             $parent = $this->resultSetMapping()->parentAliasMap[$dqlAlias];
 
             if (! isset($this->resultSetMapping()->aliasMap[$parent])) {
+                if (isset($this->resultSetMapping()->nestedEntities[$dqlAlias])) {
+                    continue;
+                }
+
                 throw HydrationException::parentObjectOfRelationNotFound($dqlAlias, $parent);
             }
 
@@ -171,7 +175,7 @@ class ObjectHydrator extends AbstractHydrator
     ): PersistentCollection {
         $oid      = spl_object_id($entity);
         $relation = $class->associationMappings[$fieldName];
-        $value    = $class->reflFields[$fieldName]->getValue($entity);
+        $value    = $class->propertyAccessors[$fieldName]->getValue($entity);
 
         if ($value === null || is_array($value)) {
             $value = new ArrayCollection((array) $value);
@@ -186,7 +190,7 @@ class ObjectHydrator extends AbstractHydrator
             );
             $value->setOwner($entity, $relation);
 
-            $class->reflFields[$fieldName]->setValue($entity, $value);
+            $class->propertyAccessors[$fieldName]->setValue($entity, $value);
             $this->uow->setOriginalEntityProperty($oid, $fieldName, $value);
 
             $this->initializedCollections[$oid . $fieldName] = $value;
@@ -346,7 +350,7 @@ class ObjectHydrator extends AbstractHydrator
                 $parentClass   = $this->metadataCache[$this->resultSetMapping()->aliasMap[$parentAlias]];
                 $relationField = $this->resultSetMapping()->relationMap[$dqlAlias];
                 $relation      = $parentClass->associationMappings[$relationField];
-                $reflField     = $parentClass->reflFields[$relationField];
+                $reflField     = $parentClass->propertyAccessors[$relationField];
 
                 // Get a reference to the parent object to which the joined element belongs.
                 if ($this->resultSetMapping()->isMixed && isset($this->rootAliases[$parentAlias])) {
@@ -446,13 +450,13 @@ class ObjectHydrator extends AbstractHydrator
                                 if ($relation->inversedBy !== null) {
                                     $inverseAssoc = $targetClass->associationMappings[$relation->inversedBy];
                                     if ($inverseAssoc->isToOne()) {
-                                        $targetClass->reflFields[$inverseAssoc->fieldName]->setValue($element, $parentObject);
+                                        $targetClass->propertyAccessors[$inverseAssoc->fieldName]->setValue($element, $parentObject);
                                         $this->uow->setOriginalEntityProperty(spl_object_id($element), $inverseAssoc->fieldName, $parentObject);
                                     }
                                 }
                             } else {
                                 // For sure bidirectional, as there is no inverse side in unidirectional mappings
-                                $targetClass->reflFields[$relation->mappedBy]->setValue($element, $parentObject);
+                                $targetClass->propertyAccessors[$relation->mappedBy]->setValue($element, $parentObject);
                                 $this->uow->setOriginalEntityProperty(spl_object_id($element), $relation->mappedBy, $parentObject);
                             }
 
@@ -569,6 +573,16 @@ class ObjectHydrator extends AbstractHydrator
         }
     }
 
+    /** @param mixed[] $data pre-hydrated SQL Result Row. */
+    protected function hydrateNestedEntity(array $data, string $dqlAlias): mixed
+    {
+        if (isset($this->resultSetMapping()->nestedEntities[$dqlAlias])) {
+            return $this->getEntity($data, $dqlAlias);
+        }
+
+        return $data;
+    }
+
     /**
      * When executed in a hydrate() loop we may have to clear internal state to
      * decrease memory consumption.

src/Mapping/AssociationMapping.php

@@ -135,7 +135,13 @@ abstract class AssociationMapping implements ArrayAccess
                     continue;
                 }
 
-                assert($mapping instanceof ManyToManyOwningSideMapping);
+                if (! $mapping instanceof ManyToManyOwningSideMapping) {
+                    throw new MappingException(
+                        "Mapping error on field '" .
+                        $mapping->fieldName . "' in " . $mapping->sourceEntity .
+                        " : 'joinTable' can only be set on many-to-many owning side.",
+                    );
+                }
 
                 $mapping->joinTable = JoinTableMapping::fromMappingArray($value);
 

src/Mapping/ClassMetadata.php

@@ -14,9 +14,12 @@ use Doctrine\Instantiator\InstantiatorInterface;
 use Doctrine\ORM\Cache\Exception\NonCacheableEntityAssociation;
 use Doctrine\ORM\EntityRepository;
 use Doctrine\ORM\Id\AbstractIdGenerator;
+use Doctrine\ORM\Mapping\PropertyAccessors\EmbeddablePropertyAccessor;
+use Doctrine\ORM\Mapping\PropertyAccessors\EnumPropertyAccessor;
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessor;
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessorFactory;
 use Doctrine\Persistence\Mapping\ClassMetadata as PersistenceClassMetadata;
 use Doctrine\Persistence\Mapping\ReflectionService;
-use Doctrine\Persistence\Reflection\EnumReflectionProperty;
 use InvalidArgumentException;
 use LogicException;
 use ReflectionClass;
@@ -57,8 +60,6 @@ use function strtolower;
 use function trait_exists;
 use function trim;
 
-use const PHP_VERSION_ID;
-
 /**
  * A <tt>ClassMetadata</tt> instance holds all the object-relational mapping metadata
  * of an entity and its associations.
@@ -543,9 +544,12 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
     /**
      * The ReflectionProperty instances of the mapped class.
      *
-     * @var array<string, ReflectionProperty|null>
+     * @var LegacyReflectionFields|array<string, ReflectionProperty>
      */
-    public array $reflFields = [];
+    public LegacyReflectionFields|array $reflFields = [];
+
+    /** @var array<string, PropertyAccessors\PropertyAccessor> */
+    public array $propertyAccessors = [];
 
     private InstantiatorInterface|null $instantiator = null;
 
@@ -569,14 +573,24 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
     /**
      * Gets the ReflectionProperties of the mapped class.
      *
-     * @return ReflectionProperty[]|null[] An array of ReflectionProperty instances.
-     * @phpstan-return array<ReflectionProperty|null>
+     * @return LegacyReflectionFields|ReflectionProperty[] An array of ReflectionProperty instances.
+     * @phpstan-return LegacyReflectionFields|array<string, ReflectionProperty>
      */
-    public function getReflectionProperties(): array
+    public function getReflectionProperties(): array|LegacyReflectionFields
     {
         return $this->reflFields;
     }
 
+    /**
+     * Gets the ReflectionProperties of the mapped class.
+     *
+     * @return PropertyAccessor[] An array of PropertyAccessor instances.
+     */
+    public function getPropertyAccessors(): array
+    {
+        return $this->propertyAccessors;
+    }
+
     /**
      * Gets a ReflectionProperty for a specific field of the mapped class.
      */
@@ -585,11 +599,12 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
         return $this->reflFields[$name];
     }
 
-    /**
-     * Gets the ReflectionProperty for the single identifier field.
-     *
-     * @throws BadMethodCallException If the class has a composite identifier.
-     */
+    public function getPropertyAccessor(string $name): PropertyAccessor|null
+    {
+        return $this->propertyAccessors[$name] ?? null;
+    }
+
+    /** @throws BadMethodCallException If the class has a composite identifier. */
     public function getSingleIdReflectionProperty(): ReflectionProperty|null
     {
         if ($this->isIdentifierComposite) {
@@ -599,6 +614,16 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
         return $this->reflFields[$this->identifier[0]];
     }
 
+    /** @throws BadMethodCallException If the class has a composite identifier. */
+    public function getSingleIdPropertyAccessor(): PropertyAccessor|null
+    {
+        if ($this->isIdentifierComposite) {
+            throw new BadMethodCallException('Class ' . $this->name . ' has a composite identifier.');
+        }
+
+        return $this->propertyAccessors[$this->identifier[0]];
+    }
+
     /**
      * Extracts the identifier values of an entity of this class.
      *
@@ -613,7 +638,7 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
             $id = [];
 
             foreach ($this->identifier as $idField) {
-                $value = $this->reflFields[$idField]->getValue($entity);
+                $value = $this->propertyAccessors[$idField]->getValue($entity);
 
                 if ($value !== null) {
                     $id[$idField] = $value;
@@ -624,7 +649,7 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
         }
 
         $id    = $this->identifier[0];
-        $value = $this->reflFields[$id]->getValue($entity);
+        $value = $this->propertyAccessors[$id]->getValue($entity);
 
         if ($value === null) {
             return [];
@@ -643,7 +668,7 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
     public function setIdentifierValues(object $entity, array $id): void
     {
         foreach ($id as $idField => $idValue) {
-            $this->reflFields[$idField]->setValue($entity, $idValue);
+            $this->propertyAccessors[$idField]->setValue($entity, $idValue);
         }
     }
 
@@ -652,7 +677,7 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
      */
     public function setFieldValue(object $entity, string $field, mixed $value): void
     {
-        $this->reflFields[$field]->setValue($entity, $value);
+        $this->propertyAccessors[$field]->setValue($entity, $value);
     }
 
     /**
@@ -660,7 +685,7 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
      */
     public function getFieldValue(object $entity, string $field): mixed
     {
-        return $this->reflFields[$field]->getValue($entity);
+        return $this->propertyAccessors[$field]->getValue($entity);
     }
 
     /**
@@ -794,76 +819,74 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
     {
         // Restore ReflectionClass and properties
         $this->reflClass    = $reflService->getClass($this->name);
+        $this->reflFields   = new LegacyReflectionFields($this, $reflService);
         $this->instantiator = $this->instantiator ?: new Instantiator();
 
-        $parentReflFields = [];
+        $parentAccessors = [];
 
         foreach ($this->embeddedClasses as $property => $embeddedClass) {
             if (isset($embeddedClass->declaredField)) {
                 assert($embeddedClass->originalField !== null);
-                $childProperty = $this->getAccessibleProperty(
-                    $reflService,
+                $childAccessor = PropertyAccessorFactory::createPropertyAccessor(
                     $this->embeddedClasses[$embeddedClass->declaredField]->class,
                     $embeddedClass->originalField,
                 );
-                assert($childProperty !== null);
-                $parentReflFields[$property] = new ReflectionEmbeddedProperty(
-                    $parentReflFields[$embeddedClass->declaredField],
-                    $childProperty,
+
+                $parentAccessors[$property] = new EmbeddablePropertyAccessor(
+                    $parentAccessors[$embeddedClass->declaredField],
+                    $childAccessor,
                     $this->embeddedClasses[$embeddedClass->declaredField]->class,
                 );
 
                 continue;
             }
 
-            $fieldRefl = $this->getAccessibleProperty(
-                $reflService,
+            $accessor = PropertyAccessorFactory::createPropertyAccessor(
                 $embeddedClass->declared ?? $this->name,
                 $property,
             );
 
-            $parentReflFields[$property] = $fieldRefl;
-            $this->reflFields[$property] = $fieldRefl;
+            $parentAccessors[$property]         = $accessor;
+            $this->propertyAccessors[$property] = $accessor;
         }
 
         foreach ($this->fieldMappings as $field => $mapping) {
-            if (isset($mapping->declaredField) && isset($parentReflFields[$mapping->declaredField])) {
+            if (isset($mapping->declaredField) && isset($parentAccessors[$mapping->declaredField])) {
                 assert($mapping->originalField !== null);
                 assert($mapping->originalClass !== null);
-                $childProperty = $this->getAccessibleProperty($reflService, $mapping->originalClass, $mapping->originalField);
-                assert($childProperty !== null);
+                $accessor = PropertyAccessorFactory::createPropertyAccessor($mapping->originalClass, $mapping->originalField);
 
-                if (isset($mapping->enumType)) {
-                    $childProperty = new EnumReflectionProperty(
-                        $childProperty,
+                if ($mapping->enumType !== null) {
+                    $accessor = new EnumPropertyAccessor(
+                        $accessor,
                         $mapping->enumType,
                     );
                 }
 
-                $this->reflFields[$field] = new ReflectionEmbeddedProperty(
-                    $parentReflFields[$mapping->declaredField],
-                    $childProperty,
+                $this->propertyAccessors[$field] = new EmbeddablePropertyAccessor(
+                    $parentAccessors[$mapping->declaredField],
+                    $accessor,
                     $mapping->originalClass,
                 );
                 continue;
             }
 
-            $this->reflFields[$field] = isset($mapping->declared)
-                ? $this->getAccessibleProperty($reflService, $mapping->declared, $field)
-                : $this->getAccessibleProperty($reflService, $this->name, $field);
+            $this->propertyAccessors[$field] = isset($mapping->declared)
+                ? PropertyAccessorFactory::createPropertyAccessor($mapping->declared, $field)
+                : PropertyAccessorFactory::createPropertyAccessor($this->name, $field);
 
-            if (isset($mapping->enumType) && $this->reflFields[$field] !== null) {
-                $this->reflFields[$field] = new EnumReflectionProperty(
-                    $this->reflFields[$field],
+            if ($mapping->enumType !== null) {
+                $this->propertyAccessors[$field] = new EnumPropertyAccessor(
+                    $this->propertyAccessors[$field],
                     $mapping->enumType,
                 );
             }
         }
 
         foreach ($this->associationMappings as $field => $mapping) {
-            $this->reflFields[$field] = isset($mapping->declared)
-                ? $this->getAccessibleProperty($reflService, $mapping->declared, $field)
-                : $this->getAccessibleProperty($reflService, $this->name, $field);
+            $this->propertyAccessors[$field] = isset($mapping->declared)
+                ? PropertyAccessorFactory::createPropertyAccessor($mapping->declared, $field)
+                : PropertyAccessorFactory::createPropertyAccessor($this->name, $field);
         }
     }
 
@@ -2659,26 +2682,4 @@ class ClassMetadata implements PersistenceClassMetadata, Stringable
 
         return $sequencePrefix;
     }
-
-    /** @phpstan-param class-string $class */
-    private function getAccessibleProperty(ReflectionService $reflService, string $class, string $field): ReflectionProperty|null
-    {
-        $reflectionProperty = $reflService->getAccessibleProperty($class, $field);
-        if ($reflectionProperty?->isReadOnly()) {
-            $declaringClass = $reflectionProperty->class;
-            if ($declaringClass !== $class) {
-                $reflectionProperty = $reflService->getAccessibleProperty($declaringClass, $field);
-            }
-
-            if ($reflectionProperty !== null) {
-                $reflectionProperty = new ReflectionReadonlyProperty($reflectionProperty);
-            }
-        }
-
-        if (PHP_VERSION_ID >= 80400 && $reflectionProperty !== null && count($reflectionProperty->getHooks()) > 0) {
-               throw new LogicException('Doctrine ORM does not support property hooks in this version. Check https://github.com/doctrine/orm/issues/11624 for details of versions that support property hooks.');
-        }
-
-        return $reflectionProperty;
-    }
 }

src/Mapping/ClassMetadataFactory.php

@@ -41,6 +41,8 @@ use function strlen;
 use function strtolower;
 use function substr;
 
+use const PHP_VERSION_ID;
+
 /**
  * The ClassMetadataFactory is used to create ClassMetadata objects that contain all the
  * metadata mapping information of a class which describes how a class should be mapped
@@ -440,8 +442,8 @@ class ClassMetadataFactory extends AbstractClassMetadataFactory
             $subClass->addInheritedFieldMapping($subClassMapping);
         }
 
-        foreach ($parentClass->reflFields as $name => $field) {
-            $subClass->reflFields[$name] = $field;
+        foreach ($parentClass->propertyAccessors as $name => $field) {
+            $subClass->propertyAccessors[$name] = $field;
         }
     }
 
@@ -699,6 +701,18 @@ class ClassMetadataFactory extends AbstractClassMetadataFactory
     protected function wakeupReflection(ClassMetadataInterface $class, ReflectionService $reflService): void
     {
         $class->wakeupReflection($reflService);
+
+        if (PHP_VERSION_ID < 80400) {
+            return;
+        }
+
+        foreach ($class->propertyAccessors as $propertyAccessor) {
+            $property = $propertyAccessor->getUnderlyingReflector();
+
+            if ($property->isVirtual()) {
+                throw MappingException::mappingVirtualPropertyNotAllowed($class->name, $property->getName());
+            }
+        }
     }
 
     protected function initializeReflection(ClassMetadataInterface $class, ReflectionService $reflService): void

src/Mapping/Driver/AttributeDriver.php

@@ -684,6 +684,7 @@ class AttributeDriver implements MappingDriver
     {
         $mapping = [
             'name' => $joinColumn->name,
+            'deferrable' => $joinColumn->deferrable,
             'unique' => $joinColumn->unique,
             'nullable' => $joinColumn->nullable,
             'onDelete' => $joinColumn->onDelete,

src/Mapping/FieldMapping.php

@@ -54,6 +54,7 @@ final class FieldMapping implements ArrayAccess
      */
     public string|null $inherited = null;
 
+    /** @var class-string|null */
     public string|null $originalClass = null;
     public string|null $originalField = null;
     public bool|null $quoted          = null;
@@ -101,7 +102,7 @@ final class FieldMapping implements ArrayAccess
      *     scale?: int|null,
      *     unique?: bool|null,
      *     inherited?: string|null,
-     *     originalClass?: string|null,
+     *     originalClass?: class-string|null,
      *     originalField?: string|null,
      *     quoted?: bool|null,
      *     declared?: string|null,

src/Mapping/JoinColumnMapping.php

@@ -13,6 +13,7 @@ final class JoinColumnMapping implements ArrayAccess
 {
     use ArrayAccessImplementation;
 
+    public bool|null $deferrable         = null;
     public bool|null $unique             = null;
     public bool|null $quoted             = null;
     public string|null $fieldName        = null;
@@ -33,7 +34,7 @@ final class JoinColumnMapping implements ArrayAccess
      * @param array<string, mixed> $mappingArray
      * @phpstan-param array{
      *     name: string,
-     *     referencedColumnName: string,
+     *     referencedColumnName: string|null,
      *     unique?: bool|null,
      *     quoted?: bool|null,
      *     fieldName?: string|null,
@@ -66,7 +67,7 @@ final class JoinColumnMapping implements ArrayAccess
             }
         }
 
-        foreach (['unique', 'quoted', 'nullable'] as $boolKey) {
+        foreach (['deferrable', 'unique', 'quoted', 'nullable'] as $boolKey) {
             if ($this->$boolKey !== null) {
                 $serialized[] = $boolKey;
             }

src/Mapping/JoinColumnProperties.php

@@ -9,7 +9,8 @@ trait JoinColumnProperties
     /** @param array<string, mixed> $options */
     public function __construct(
         public readonly string|null $name = null,
-        public readonly string $referencedColumnName = 'id',
+        public readonly string|null $referencedColumnName = null,
+        public readonly bool $deferrable = false,
         public readonly bool $unique = false,
         public readonly bool $nullable = true,
         public readonly mixed $onDelete = null,

src/Mapping/LegacyReflectionFields.php

@@ -0,0 +1,170 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping;
+
+use ArrayAccess;
+use Doctrine\Deprecations\Deprecation;
+use Doctrine\Persistence\Mapping\ReflectionService;
+use Doctrine\Persistence\Reflection\EnumReflectionProperty;
+use Generator;
+use IteratorAggregate;
+use OutOfBoundsException;
+use ReflectionProperty;
+use Traversable;
+
+use function array_keys;
+use function assert;
+use function is_string;
+use function str_contains;
+use function str_replace;
+
+/**
+ * @template-implements ArrayAccess<string, ReflectionProperty|null>
+ * @template-implements IteratorAggregate<string, ReflectionProperty|null>
+ */
+class LegacyReflectionFields implements ArrayAccess, IteratorAggregate
+{
+    /** @var array<string, ReflectionProperty|null> */
+    private array $reflFields = [];
+
+    public function __construct(private ClassMetadata $classMetadata, private ReflectionService $reflectionService)
+    {
+    }
+
+    /** @param string $offset */
+    public function offsetExists($offset): bool // phpcs:ignore
+    {
+        Deprecation::trigger(
+            'doctrine/orm',
+            'https://github.com/doctrine/orm/pull/11659',
+            'Access to ClassMetadata::$reflFields is deprecated and will be removed in Doctrine ORM 4.0.',
+        );
+
+        return isset($this->classMetadata->propertyAccessors[$offset]);
+    }
+
+    /**
+     * @param string $field
+     *
+     * @psalm-suppress LessSpecificImplementedReturnType
+     */
+    public function offsetGet($field): mixed // phpcs:ignore
+    {
+        if (isset($this->reflFields[$field])) {
+            return $this->reflFields[$field];
+        }
+
+        Deprecation::trigger(
+            'doctrine/orm',
+            'https://github.com/doctrine/orm/pull/11659',
+            'Access to ClassMetadata::$reflFields is deprecated and will be removed in Doctrine ORM 4.0.',
+        );
+
+        if (isset($this->classMetadata->propertyAccessors[$field])) {
+            $fieldName = str_contains($field, '.') ? $this->classMetadata->fieldMappings[$field]->originalField : $field;
+            $className = $this->classMetadata->name;
+
+            assert(is_string($fieldName));
+
+            if (isset($this->classMetadata->fieldMappings[$field]) && $this->classMetadata->fieldMappings[$field]->originalClass !== null) {
+                $className = $this->classMetadata->fieldMappings[$field]->originalClass;
+            } elseif (isset($this->classMetadata->fieldMappings[$field]) && $this->classMetadata->fieldMappings[$field]->declared !== null) {
+                $className = $this->classMetadata->fieldMappings[$field]->declared;
+            } elseif (isset($this->classMetadata->associationMappings[$field]) && $this->classMetadata->associationMappings[$field]->declared !== null) {
+                $className = $this->classMetadata->associationMappings[$field]->declared;
+            } elseif (isset($this->classMetadata->embeddedClasses[$field]) && $this->classMetadata->embeddedClasses[$field]->declared !== null) {
+                $className = $this->classMetadata->embeddedClasses[$field]->declared;
+            }
+
+            /** @psalm-suppress ArgumentTypeCoercion */
+            $this->reflFields[$field] = $this->getAccessibleProperty($className, $fieldName);
+
+            if (isset($this->classMetadata->fieldMappings[$field])) {
+                if ($this->classMetadata->fieldMappings[$field]->enumType !== null) {
+                    $this->reflFields[$field] = new EnumReflectionProperty(
+                        $this->reflFields[$field],
+                        $this->classMetadata->fieldMappings[$field]->enumType,
+                    );
+                }
+
+                if ($this->classMetadata->fieldMappings[$field]->originalField !== null) {
+                    $parentField   = str_replace('.' . $fieldName, '', $field);
+                    $originalClass = $this->classMetadata->fieldMappings[$field]->originalClass;
+
+                    if (! str_contains($parentField, '.')) {
+                        $parentClass = $this->classMetadata->name;
+                    } else {
+                        $parentClass = $this->classMetadata->fieldMappings[$parentField]->originalClass;
+                    }
+
+                    /** @psalm-var class-string $parentClass */
+                    /** @psalm-var class-string $originalClass */
+
+                    $this->reflFields[$field] = new ReflectionEmbeddedProperty(
+                        $this->getAccessibleProperty($parentClass, $parentField),
+                        $this->reflFields[$field],
+                        $originalClass,
+                    );
+                }
+            }
+
+            return $this->reflFields[$field];
+        }
+
+        throw new OutOfBoundsException('Unknown field: ' . $this->classMetadata->name . ' ::$' . $field);
+    }
+
+    /**
+     * @param string             $offset
+     * @param ReflectionProperty $value
+     */
+    public function offsetSet($offset, $value): void // phpcs:ignore
+    {
+        $this->reflFields[$offset] = $value;
+    }
+
+    /** @param string $offset */
+    public function offsetUnset($offset): void // phpcs:ignore
+    {
+        unset($this->reflFields[$offset]);
+    }
+
+    /** @psalm-param class-string $class */
+    private function getAccessibleProperty(string $class, string $field): ReflectionProperty
+    {
+        $reflectionProperty = $this->reflectionService->getAccessibleProperty($class, $field);
+
+        assert($reflectionProperty !== null);
+
+        if ($reflectionProperty->isReadOnly()) {
+            $declaringClass = $reflectionProperty->class;
+            if ($declaringClass !== $class) {
+                $reflectionProperty = $this->reflectionService->getAccessibleProperty($declaringClass, $field);
+
+                assert($reflectionProperty !== null);
+            }
+
+            $reflectionProperty = new ReflectionReadonlyProperty($reflectionProperty);
+        }
+
+        return $reflectionProperty;
+    }
+
+    /** @return Generator<string, ReflectionProperty> */
+    public function getIterator(): Traversable
+    {
+        Deprecation::trigger(
+            'doctrine/orm',
+            'https://github.com/doctrine/orm/pull/11659',
+            'Access to ClassMetadata::$reflFields is deprecated and will be removed in Doctrine ORM 4.0.',
+        );
+
+        $keys = array_keys($this->classMetadata->propertyAccessors);
+
+        foreach ($keys as $key) {
+            yield $key => $this->offsetGet($key);
+        }
+    }
+}

src/Mapping/ManyToManyOwningSideMapping.php

@@ -61,10 +61,14 @@ final class ManyToManyOwningSideMapping extends ToManyOwningSideMapping implemen
     {
         if (isset($mappingArray['joinTable']['joinColumns'])) {
             foreach ($mappingArray['joinTable']['joinColumns'] as $key => $joinColumn) {
+                if (empty($joinColumn['referencedColumnName'])) {
+                    $mappingArray['joinTable']['joinColumns'][$key]['referencedColumnName'] = $namingStrategy->referenceColumnName();
+                }
+
                 if (empty($joinColumn['name'])) {
                     $mappingArray['joinTable']['joinColumns'][$key]['name'] = $namingStrategy->joinKeyColumnName(
                         $mappingArray['sourceEntity'],
-                        $joinColumn['referencedColumnName'] ?? null,
+                        $joinColumn['referencedColumnName'] ?? $namingStrategy->referenceColumnName(),
                     );
                 }
             }
@@ -72,10 +76,14 @@ final class ManyToManyOwningSideMapping extends ToManyOwningSideMapping implemen
 
         if (isset($mappingArray['joinTable']['inverseJoinColumns'])) {
             foreach ($mappingArray['joinTable']['inverseJoinColumns'] as $key => $joinColumn) {
+                if (empty($joinColumn['referencedColumnName'])) {
+                    $mappingArray['joinTable']['inverseJoinColumns'][$key]['referencedColumnName'] = $namingStrategy->referenceColumnName();
+                }
+
                 if (empty($joinColumn['name'])) {
                     $mappingArray['joinTable']['inverseJoinColumns'][$key]['name'] = $namingStrategy->joinKeyColumnName(
                         $mappingArray['targetEntity'],
-                        $joinColumn['referencedColumnName'] ?? null,
+                        $joinColumn['referencedColumnName'] ?? $namingStrategy->referenceColumnName(),
                     );
                 }
             }

src/Mapping/MappingException.php

@@ -688,4 +688,13 @@ EXCEPTION
             $entityName,
         ));
     }
+
+    public static function mappingVirtualPropertyNotAllowed(string $entityName, string $propertyName): self
+    {
+        return new self(sprintf(
+            'Mapping virtual property "%s" on entity "%s" is not allowed.',
+            $propertyName,
+            $entityName,
+        ));
+    }
 }

src/Mapping/PropertyAccessors/EmbeddablePropertyAccessor.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\Instantiator\Instantiator;
+use ReflectionProperty;
+
+/** @internal */
+class EmbeddablePropertyAccessor implements PropertyAccessor
+{
+    private static Instantiator|null $instantiator = null;
+
+    public function __construct(
+        private PropertyAccessor $parent,
+        private PropertyAccessor $child,
+        /** @var class-string */
+        private string $embeddedClass,
+    ) {
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        $embeddedObject = $this->parent->getValue($object);
+
+        if ($embeddedObject === null) {
+            self::$instantiator ??= new Instantiator();
+
+            $embeddedObject = self::$instantiator->instantiate($this->embeddedClass);
+
+            $this->parent->setValue($object, $embeddedObject);
+        }
+
+        $this->child->setValue($embeddedObject, $value);
+    }
+
+    public function getValue(object $object): mixed
+    {
+        $embeddedObject = $this->parent->getValue($object);
+
+        if ($embeddedObject === null) {
+            return null;
+        }
+
+        return $this->child->getValue($embeddedObject);
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->child->getUnderlyingReflector();
+    }
+}

src/Mapping/PropertyAccessors/EnumPropertyAccessor.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use BackedEnum;
+use ReflectionProperty;
+
+use function array_map;
+use function is_array;
+use function reset;
+
+/** @internal */
+class EnumPropertyAccessor implements PropertyAccessor
+{
+    /** @param class-string<BackedEnum> $enumType */
+    public function __construct(private PropertyAccessor $parent, private string $enumType)
+    {
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        if ($value !== null) {
+            $value = $this->toEnum($value);
+        }
+
+        $this->parent->setValue($object, $value);
+    }
+
+    public function getValue(object $object): mixed
+    {
+        $enum = $this->parent->getValue($object);
+
+        if ($enum === null) {
+            return null;
+        }
+
+        return $this->fromEnum($enum);
+    }
+
+    /**
+     * @param BackedEnum|BackedEnum[] $enum
+     *
+     * @return ($enum is BackedEnum ? (string|int) : (string[]|int[]))
+     */
+    private function fromEnum($enum) // phpcs:ignore
+    {
+        if (is_array($enum)) {
+            return array_map(static function (BackedEnum $enum) {
+                return $enum->value;
+            }, $enum);
+        }
+
+        return $enum->value;
+    }
+
+    /**
+     * @phpstan-param BackedEnum|BackedEnum[]|int|string|int[]|string[] $value
+     *
+     * @return ($value is int|string|BackedEnum ? BackedEnum : BackedEnum[])
+     */
+    private function toEnum($value): BackedEnum|array
+    {
+        if ($value instanceof BackedEnum) {
+            return $value;
+        }
+
+        if (is_array($value)) {
+            $v = reset($value);
+            if ($v instanceof BackedEnum) {
+                return $value;
+            }
+
+            return array_map([$this->enumType, 'from'], $value);
+        }
+
+        return $this->enumType::from($value);
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->parent->getUnderlyingReflector();
+    }
+}

src/Mapping/PropertyAccessors/ObjectCastPropertyAccessor.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Proxy\InternalProxy;
+use ReflectionProperty;
+
+use function ltrim;
+
+/** @internal */
+class ObjectCastPropertyAccessor implements PropertyAccessor
+{
+    /** @param class-string $class */
+    public static function fromNames(string $class, string $name): self
+    {
+        $reflectionProperty = new ReflectionProperty($class, $name);
+
+        $key = $reflectionProperty->isPrivate() ? "\0" . ltrim($class, '\\') . "\0" . $name : ($reflectionProperty->isProtected() ? "\0*\0" . $name : $name);
+
+        return new self($reflectionProperty, $key);
+    }
+
+    public static function fromReflectionProperty(ReflectionProperty $reflectionProperty): self
+    {
+        $name = $reflectionProperty->getName();
+        $key  = $reflectionProperty->isPrivate() ? "\0" . ltrim($reflectionProperty->getDeclaringClass()->getName(), '\\') . "\0" . $name : ($reflectionProperty->isProtected() ? "\0*\0" . $name : $name);
+
+        return new self($reflectionProperty, $key);
+    }
+
+    private function __construct(private ReflectionProperty $reflectionProperty, private string $key)
+    {
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        if (! ($object instanceof InternalProxy && ! $object->__isInitialized())) {
+            $this->reflectionProperty->setValue($object, $value);
+
+            return;
+        }
+
+        $object->__setInitialized(true);
+
+        $this->reflectionProperty->setValue($object, $value);
+
+        $object->__setInitialized(false);
+    }
+
+    public function getValue(object $object): mixed
+    {
+        return ((array) $object)[$this->key] ?? null;
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->reflectionProperty;
+    }
+}

src/Mapping/PropertyAccessors/PropertyAccessor.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use ReflectionProperty;
+
+/**
+ * A property accessor is a class that allows to read and write properties on objects regardless of visibility.
+ *
+ * We use them while creating objects from database rows in {@link UnitOfWork::createEntity()} or when
+ * computing changesets from objects that are about to be written back to the database in {@link UnitOfWork::computeChangeSet()}.
+ *
+ * This abstraction over ReflectionProperty is necessary, because for several features of either Doctrine or PHP, we
+ * need to handle edge cases in reflection at a central location in the code.
+ *
+ * @internal
+ */
+interface PropertyAccessor
+{
+    public function setValue(object $object, mixed $value): void;
+
+    public function getValue(object $object): mixed;
+
+    public function getUnderlyingReflector(): ReflectionProperty;
+}

src/Mapping/PropertyAccessors/PropertyAccessorFactory.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use ReflectionProperty;
+
+use const PHP_VERSION_ID;
+
+class PropertyAccessorFactory
+{
+    /** @phpstan-param class-string $className */
+    public static function createPropertyAccessor(string $className, string $propertyName): PropertyAccessor
+    {
+        $reflectionProperty = new ReflectionProperty($className, $propertyName);
+
+        $accessor = PHP_VERSION_ID >= 80400
+            ? RawValuePropertyAccessor::fromReflectionProperty($reflectionProperty)
+            : ObjectCastPropertyAccessor::fromReflectionProperty($reflectionProperty);
+
+        if ($reflectionProperty->hasType() && ! $reflectionProperty->getType()->allowsNull()) {
+            $accessor = new TypedNoDefaultPropertyAccessor($accessor, $reflectionProperty);
+        }
+
+        if ($reflectionProperty->isReadOnly()) {
+            $accessor = new ReadonlyAccessor($accessor, $reflectionProperty);
+        }
+
+        return $accessor;
+    }
+}

src/Mapping/PropertyAccessors/RawValuePropertyAccessor.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Proxy\InternalProxy;
+use LogicException;
+use ReflectionProperty;
+
+use function ltrim;
+
+use const PHP_VERSION_ID;
+
+/**
+ * This is a PHP 8.4 and up only class and replaces ObjectCastPropertyAccessor.
+ *
+ * It works based on the raw values of a property, which for a case of property hooks
+ * is the backed value. If we kept using setValue/getValue, this would go through the hooks,
+ * which potentially change the data.
+ */
+class RawValuePropertyAccessor implements PropertyAccessor
+{
+    public static function fromReflectionProperty(ReflectionProperty $reflectionProperty): self
+    {
+        $name = $reflectionProperty->getName();
+        $key  = $reflectionProperty->isPrivate() ? "\0" . ltrim($reflectionProperty->getDeclaringClass()->getName(), '\\') . "\0" . $name : ($reflectionProperty->isProtected() ? "\0*\0" . $name : $name);
+
+        return new self($reflectionProperty, $key);
+    }
+
+    private function __construct(private ReflectionProperty $reflectionProperty, private string $key)
+    {
+        if (PHP_VERSION_ID < 80400) {
+            throw new LogicException('This class requires PHP 8.4 or higher.');
+        }
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        if (! ($object instanceof InternalProxy && ! $object->__isInitialized())) {
+            $this->reflectionProperty->setRawValueWithoutLazyInitialization($object, $value);
+
+            return;
+        }
+
+        $object->__setInitialized(true);
+
+        $this->reflectionProperty->setRawValue($object, $value);
+
+        $object->__setInitialized(false);
+    }
+
+    public function getValue(object $object): mixed
+    {
+        return ((array) $object)[$this->key] ?? null;
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->reflectionProperty;
+    }
+}

src/Mapping/PropertyAccessors/ReadonlyAccessor.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use InvalidArgumentException;
+use LogicException;
+use ReflectionProperty;
+
+use function sprintf;
+
+/** @internal */
+class ReadonlyAccessor implements PropertyAccessor
+{
+    public function __construct(private PropertyAccessor $parent, private ReflectionProperty $reflectionProperty)
+    {
+        if (! $this->reflectionProperty->isReadOnly()) {
+            throw new InvalidArgumentException(sprintf(
+                '%s::$%s must be readonly property',
+                $this->reflectionProperty->getDeclaringClass()->getName(),
+                $this->reflectionProperty->getName(),
+            ));
+        }
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        if (! $this->reflectionProperty->isInitialized($object)) {
+            $this->parent->setValue($object, $value);
+
+            return;
+        }
+
+        if ($this->parent->getValue($object) !== $value) {
+            throw new LogicException(sprintf(
+                'Attempting to change readonly property %s::$%s.',
+                $this->reflectionProperty->getDeclaringClass()->getName(),
+                $this->reflectionProperty->getName(),
+            ));
+        }
+    }
+
+    public function getValue(object $object): mixed
+    {
+        return $this->parent->getValue($object);
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->reflectionProperty;
+    }
+}

src/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessor.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping\PropertyAccessors;
+
+use Closure;
+use InvalidArgumentException;
+use ReflectionProperty;
+
+use function assert;
+use function sprintf;
+
+/** @internal */
+class TypedNoDefaultPropertyAccessor implements PropertyAccessor
+{
+    private Closure|null $unsetter = null;
+
+    public function __construct(private PropertyAccessor $parent, private ReflectionProperty $reflectionProperty)
+    {
+        if (! $this->reflectionProperty->hasType()) {
+            throw new InvalidArgumentException(sprintf(
+                '%s::$%s must have a type when used with TypedNoDefaultPropertyAccessor',
+                $this->reflectionProperty->getDeclaringClass()->getName(),
+                $this->reflectionProperty->getName(),
+            ));
+        }
+
+        if ($this->reflectionProperty->getType()->allowsNull()) {
+            throw new InvalidArgumentException(sprintf(
+                '%s::$%s must not be nullable when used with TypedNoDefaultPropertyAccessor',
+                $this->reflectionProperty->getDeclaringClass()->getName(),
+                $this->reflectionProperty->getName(),
+            ));
+        }
+    }
+
+    public function setValue(object $object, mixed $value): void
+    {
+        if ($value === null) {
+            if ($this->unsetter === null) {
+                $propertyName   = $this->reflectionProperty->getName();
+                $this->unsetter = function () use ($propertyName): void {
+                    unset($this->$propertyName);
+                };
+            }
+
+            $unsetter = $this->unsetter->bindTo($object, $this->reflectionProperty->getDeclaringClass()->getName());
+
+            assert($unsetter instanceof Closure);
+
+            $unsetter();
+
+            return;
+        }
+
+        $this->parent->setValue($object, $value);
+    }
+
+    public function getValue(object $object): mixed
+    {
+        return $this->reflectionProperty->isInitialized($object) ? $this->parent->getValue($object) : null;
+    }
+
+    public function getUnderlyingReflector(): ReflectionProperty
+    {
+        return $this->reflectionProperty;
+    }
+}

src/Mapping/ToOneOwningSideMapping.php

@@ -107,6 +107,10 @@ abstract class ToOneOwningSideMapping extends OwningSideMapping implements ToOne
                 if (empty($joinColumn['name'])) {
                     $mappingArray['joinColumns'][$index]['name'] = $namingStrategy->joinColumnName($mappingArray['fieldName'], $name);
                 }
+
+                if (empty($joinColumn['referencedColumnName'])) {
+                    $mappingArray['joinColumns'][$index]['referencedColumnName'] = $namingStrategy->referenceColumnName();
+                }
             }
         }
 

src/PersistentCollection.php

@@ -140,7 +140,7 @@ final class PersistentCollection extends AbstractLazyCollection implements Selec
         if ($this->backRefFieldName && $this->getMapping()->isOneToMany()) {
             assert($this->typeClass !== null);
             // Set back reference to owner
-            $this->typeClass->reflFields[$this->backRefFieldName]->setValue(
+            $this->typeClass->propertyAccessors[$this->backRefFieldName]->setValue(
                 $element,
                 $this->owner,
             );
@@ -166,7 +166,7 @@ final class PersistentCollection extends AbstractLazyCollection implements Selec
         if ($this->backRefFieldName && $this->getMapping()->isOneToMany()) {
             assert($this->typeClass !== null);
             // Set back reference to owner
-            $this->typeClass->reflFields[$this->backRefFieldName]->setValue(
+            $this->typeClass->propertyAccessors[$this->backRefFieldName]->setValue(
                 $element,
                 $this->owner,
             );

src/Persisters/Entity/BasicEntityPersister.php

@@ -480,7 +480,7 @@ class BasicEntityPersister implements EntityPersister
 
             $where[]  = $versionColumn;
             $types[]  = $this->class->fieldMappings[$versionField]->type;
-            $params[] = $this->class->reflFields[$versionField]->getValue($entity);
+            $params[] = $this->class->propertyAccessors[$versionField]->getValue($entity);
 
             switch ($versionFieldType) {
                 case Types::SMALLINT:
@@ -791,7 +791,7 @@ class BasicEntityPersister implements EntityPersister
 
             // Complete bidirectional association, if necessary
             if ($targetEntity !== null && $isInverseSingleValued) {
-                $targetClass->reflFields[$assoc->inversedBy]->setValue($targetEntity, $sourceEntity);
+                $targetClass->propertyAccessors[$assoc->inversedBy]->setValue($targetEntity, $sourceEntity);
             }
 
             return $targetEntity;
@@ -838,7 +838,7 @@ class BasicEntityPersister implements EntityPersister
                 }
             } else {
                 $computedIdentifier[$targetClass->getFieldForColumn($targetKeyColumn)] =
-                    $sourceClass->reflFields[$sourceClass->fieldNames[$sourceKeyColumn]]->getValue($sourceEntity);
+                    $sourceClass->propertyAccessors[$sourceClass->fieldNames[$sourceKeyColumn]]->getValue($sourceEntity);
             }
         }
 
@@ -1055,7 +1055,7 @@ class BasicEntityPersister implements EntityPersister
             switch (true) {
                 case $sourceClass->containsForeignIdentifier:
                     $field = $sourceClass->getFieldForColumn($sourceKeyColumn);
-                    $value = $sourceClass->reflFields[$field]->getValue($sourceEntity);
+                    $value = $sourceClass->propertyAccessors[$field]->getValue($sourceEntity);
 
                     if (isset($sourceClass->associationMappings[$field])) {
                         $value = $this->em->getUnitOfWork()->getEntityIdentifier($value);
@@ -1066,7 +1066,7 @@ class BasicEntityPersister implements EntityPersister
 
                 case isset($sourceClass->fieldNames[$sourceKeyColumn]):
                     $field = $sourceClass->fieldNames[$sourceKeyColumn];
-                    $value = $sourceClass->reflFields[$field]->getValue($sourceEntity);
+                    $value = $sourceClass->propertyAccessors[$field]->getValue($sourceEntity);
 
                     break;
 
@@ -1470,7 +1470,7 @@ class BasicEntityPersister implements EntityPersister
     {
         $columns = [];
 
-        foreach ($this->class->reflFields as $name => $field) {
+        foreach ($this->class->propertyAccessors as $name => $field) {
             if ($this->class->isVersioned && $this->class->versionField === $name) {
                 continue;
             }
@@ -1824,7 +1824,7 @@ class BasicEntityPersister implements EntityPersister
         foreach ($owningAssoc->targetToSourceKeyColumns as $sourceKeyColumn => $targetKeyColumn) {
             if ($sourceClass->containsForeignIdentifier) {
                 $field = $sourceClass->getFieldForColumn($sourceKeyColumn);
-                $value = $sourceClass->reflFields[$field]->getValue($sourceEntity);
+                $value = $sourceClass->propertyAccessors[$field]->getValue($sourceEntity);
 
                 if (isset($sourceClass->associationMappings[$field])) {
                     $value = $this->em->getUnitOfWork()->getEntityIdentifier($value);
@@ -1842,7 +1842,7 @@ class BasicEntityPersister implements EntityPersister
             }
 
             $field = $sourceClass->fieldNames[$sourceKeyColumn];
-            $value = $sourceClass->reflFields[$field]->getValue($sourceEntity);
+            $value = $sourceClass->propertyAccessors[$field]->getValue($sourceEntity);
 
             $criteria[$tableAlias . '.' . $targetKeyColumn] = $value;
             $parameters[]                                   = [

src/Persisters/Entity/JoinedSubclassPersister.php

@@ -460,7 +460,7 @@ class JoinedSubclassPersister extends AbstractEntityInheritancePersister
             ? $this->class->getIdentifierColumnNames()
             : [];
 
-        foreach ($this->class->reflFields as $name => $field) {
+        foreach ($this->class->propertyAccessors as $name => $field) {
             if (
                 isset($this->class->fieldMappings[$name]->inherited)
                     && ! isset($this->class->fieldMappings[$name]->id)

src/Proxy/ProxyFactory.php

@@ -13,16 +13,19 @@ use Doctrine\ORM\UnitOfWork;
 use Doctrine\ORM\Utility\IdentifierFlattener;
 use Doctrine\Persistence\Mapping\ClassMetadata;
 use Doctrine\Persistence\Proxy;
+use LogicException;
+use ReflectionClass;
 use ReflectionProperty;
 use Symfony\Component\VarExporter\ProxyHelper;
 
 use function array_combine;
 use function array_flip;
-use function array_intersect_key;
+use function array_keys;
 use function assert;
 use function bin2hex;
 use function chmod;
 use function class_exists;
+use function count;
 use function dirname;
 use function file_exists;
 use function file_put_contents;
@@ -37,6 +40,7 @@ use function preg_match_all;
 use function random_bytes;
 use function rename;
 use function rtrim;
+use function sprintf;
 use function str_replace;
 use function strpos;
 use function strrpos;
@@ -45,6 +49,7 @@ use function substr;
 use function ucfirst;
 
 use const DIRECTORY_SEPARATOR;
+use const PHP_VERSION_ID;
 
 /**
  * This factory is used to create proxy objects for entities at runtime.
@@ -127,6 +132,9 @@ EOPHP;
     /** @var array<class-string, Closure> */
     private array $proxyFactories = [];
 
+    private readonly string $proxyDir;
+    private readonly string $proxyNs;
+
     /**
      * Initializes a new instance of the <tt>ProxyFactory</tt> class that is
      * connected to the given <tt>EntityManager</tt>.
@@ -138,15 +146,15 @@ EOPHP;
      */
     public function __construct(
         private readonly EntityManagerInterface $em,
-        private readonly string $proxyDir,
-        private readonly string $proxyNs,
+        string|null $proxyDir = null,
+        string|null $proxyNs = null,
         bool|int $autoGenerate = self::AUTOGENERATE_NEVER,
     ) {
-        if (! $proxyDir) {
+        if (! $proxyDir && ! $em->getConfiguration()->isNativeLazyObjectsEnabled()) {
             throw ORMInvalidArgumentException::proxyDirectoryRequired();
         }
 
-        if (! $proxyNs) {
+        if (! $proxyNs && ! $em->getConfiguration()->isNativeLazyObjectsEnabled()) {
             throw ORMInvalidArgumentException::proxyNamespaceRequired();
         }
 
@@ -154,6 +162,17 @@ EOPHP;
             throw ORMInvalidArgumentException::invalidAutoGenerateMode($autoGenerate);
         }
 
+        if ($proxyDir === null && $em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            $proxyDir = '';
+        }
+
+        if ($proxyNs === null && $em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            $proxyNs = '';
+        }
+
+        $this->proxyDir = $proxyDir;
+        $this->proxyNs  = $proxyNs;
+
         $this->uow                 = $em->getUnitOfWork();
         $this->autoGenerate        = (int) $autoGenerate;
         $this->identifierFlattener = new IdentifierFlattener($this->uow, $em->getMetadataFactory());
@@ -163,8 +182,35 @@ EOPHP;
      * @param class-string $className
      * @param array<mixed> $identifier
      */
-    public function getProxy(string $className, array $identifier): InternalProxy
+    public function getProxy(string $className, array $identifier): object
     {
+        if ($this->em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            $classMetadata       = $this->em->getClassMetadata($className);
+            $entityPersister     = $this->uow->getEntityPersister($className);
+            $identifierFlattener = $this->identifierFlattener;
+
+            $proxy = $classMetadata->reflClass->newLazyGhost(static function (object $object) use (
+                $identifier,
+                $entityPersister,
+                $identifierFlattener,
+                $classMetadata,
+            ): void {
+                $original = $entityPersister->loadById($identifier, $object);
+                if ($original === null) {
+                    throw EntityNotFoundException::fromClassNameAndIdentifier(
+                        $classMetadata->getName(),
+                        $identifierFlattener->flattenIdentifier($classMetadata, $identifier),
+                    );
+                }
+            }, ReflectionClass::SKIP_INITIALIZATION_ON_SERIALIZE);
+
+            foreach ($identifier as $idField => $value) {
+                $classMetadata->propertyAccessors[$idField]->setValue($proxy, $value);
+            }
+
+            return $proxy;
+        }
+
         $proxyFactory = $this->proxyFactories[$className] ?? $this->getProxyFactory($className);
 
         return $proxyFactory($identifier);
@@ -182,6 +228,10 @@ EOPHP;
      */
     public function generateProxyClasses(array $classes, string|null $proxyDir = null): int
     {
+        if ($this->em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            return 0;
+        }
+
         $generated = 0;
 
         foreach ($classes as $class) {
@@ -232,8 +282,8 @@ EOPHP;
 
             $class = $entityPersister->getClassMetadata();
 
-            foreach ($class->getReflectionProperties() as $property) {
-                if (! $property || isset($identifier[$property->getName()])) {
+            foreach ($class->getPropertyAccessors() as $name => $property) {
+                if (isset($identifier[$name])) {
                     continue;
                 }
 
@@ -262,6 +312,14 @@ EOPHP;
             foreach ($reflector->getProperties($filter) as $property) {
                 $name = $property->name;
 
+                if (PHP_VERSION_ID >= 80400 && count($property->getHooks()) > 0) {
+                    throw new LogicException(sprintf(
+                        'Doctrine ORM does not support property hook on %s::%s without using native lazy objects. Check https://github.com/doctrine/orm/issues/11624 for details of versions that support property hooks.',
+                        $property->getDeclaringClass()->getName(),
+                        $property->getName(),
+                    ));
+                }
+
                 if ($property->isStatic() || ! isset($identifiers[$name])) {
                     continue;
                 }
@@ -279,7 +337,11 @@ EOPHP;
         $entityPersister  = $this->uow->getEntityPersister($className);
         $initializer      = $this->createLazyInitializer($class, $entityPersister, $this->identifierFlattener);
         $proxyClassName   = $this->loadProxyClass($class);
-        $identifierFields = array_intersect_key($class->getReflectionProperties(), $identifiers);
+        $identifierFields = [];
+
+        foreach (array_keys($identifiers) as $identifier) {
+            $identifierFields[$identifier] = $class->getPropertyAccessor($identifier);
+        }
 
         $proxyFactory = Closure::bind(static function (array $identifier) use ($initializer, $skippedProperties, $identifierFields, $className): InternalProxy {
             $proxy = self::createLazyGhost(static function (InternalProxy $object) use ($initializer, $identifier): void {

src/Query/AST/EntityAsDtoArgumentExpression.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Query\AST;
+
+use Doctrine\ORM\Query\SqlWalker;
+
+/**
+ * EntityAsDtoArgumentExpression ::= IdentificationVariable
+ *
+ * @link    www.doctrine-project.org
+ */
+class EntityAsDtoArgumentExpression extends Node
+{
+    public function __construct(
+        public mixed $expression,
+        public string|null $identificationVariable,
+    ) {
+    }
+
+    public function dispatch(SqlWalker $walker): string
+    {
+        return $walker->walkEntityAsDtoArgumentExpression($this);
+    }
+}

src/Query/Parser.php

@@ -1106,6 +1106,50 @@ final class Parser
         return $this->PathExpression(AST\PathExpression::TYPE_COLLECTION_VALUED_ASSOCIATION);
     }
 
+    /**
+     * EntityAsDtoArgumentExpression ::= IdentificationVariable
+     */
+    public function EntityAsDtoArgumentExpression(): AST\EntityAsDtoArgumentExpression
+    {
+        assert($this->lexer->lookahead !== null);
+        $expression    = null;
+        $identVariable = null;
+        $peek          = $this->lexer->glimpse();
+        $lookaheadType = $this->lexer->lookahead->type;
+        assert($peek !== null);
+
+        assert($lookaheadType === TokenType::T_IDENTIFIER);
+        assert($peek->type !== TokenType::T_DOT);
+        assert($peek->type !== TokenType::T_OPEN_PARENTHESIS);
+
+        $expression = $identVariable = $this->IdentificationVariable();
+
+        // [["AS"] AliasResultVariable]
+        $mustHaveAliasResultVariable = false;
+
+        if ($this->lexer->isNextToken(TokenType::T_AS)) {
+            $this->match(TokenType::T_AS);
+
+            $mustHaveAliasResultVariable = true;
+        }
+
+        $aliasResultVariable = null;
+
+        if ($mustHaveAliasResultVariable || $this->lexer->isNextToken(TokenType::T_IDENTIFIER)) {
+            $token               = $this->lexer->lookahead;
+            $aliasResultVariable = $this->AliasResultVariable();
+
+            // Include AliasResultVariable in query components.
+            $this->queryComponents[$aliasResultVariable] = [
+                'resultVariable' => $expression,
+                'nestingLevel'   => $this->nestingLevel,
+                'token'          => $token,
+            ];
+        }
+
+        return new AST\EntityAsDtoArgumentExpression($expression, $identVariable);
+    }
+
     /**
      * SelectClause ::= "SELECT" ["DISTINCT"] SelectExpression {"," SelectExpression}
      */
@@ -1849,6 +1893,8 @@ final class Parser
             $this->match(TokenType::T_CLOSE_PARENTHESIS);
         } elseif ($token->type === TokenType::T_NEW) {
             $expression = $this->NewObjectExpression();
+        } elseif ($token->type === TokenType::T_IDENTIFIER && $peek->type !== TokenType::T_DOT && $peek->type !== TokenType::T_OPEN_PARENTHESIS) {
+            $expression = $this->EntityAsDtoArgumentExpression();
         } else {
             $expression = $this->ScalarExpression();
         }

src/Query/ResultSetMapping.php

@@ -169,7 +169,7 @@ class ResultSetMapping
     /**
      * Maps last argument for new objects in order to initiate object construction
      *
-     * @phpstan-var array<int|string, array{ownerIndex: string|int, argIndex: int|string}>
+     * @phpstan-var array<int|string, array{ownerIndex: string|int, argIndex: int|string, argAlias: string}>
      */
     public array $nestedNewObjectArguments = [];
 
@@ -187,6 +187,13 @@ class ResultSetMapping
      */
     public array $discriminatorParameters = [];
 
+    /**
+     * Entities nested in Dto's
+     *
+     * @phpstan-var array<string, array<string, (int|string)>>
+     */
+    public array $nestedEntities = [];
+
     /**
      * Adds an entity result to this ResultSetMapping.
      *

src/Query/SqlWalker.php

@@ -575,6 +575,14 @@ class SqlWalker
         return implode(', ', $sqlParts);
     }
 
+    /**
+     * Walks down an EntityAsDtoArgumentExpression AST node, thereby generating the appropriate SQL.
+     */
+    public function walkEntityAsDtoArgumentExpression(AST\EntityAsDtoArgumentExpression $expr): string
+    {
+        return implode(', ', $this->walkObjectExpression($expr->expression, [], $expr->identificationVariable ?: null));
+    }
+
     /**
      * Walks down an IdentificationVariable (no AST node associated), thereby generating the SQL.
      */
@@ -1356,32 +1364,79 @@ class SqlWalker
                     $partialFieldSet = [];
                 }
 
-                $class       = $this->getMetadataForDqlAlias($dqlAlias);
-                $resultAlias = $selectExpression->fieldIdentificationVariable ?: null;
+                $sql .= implode(', ', $this->walkObjectExpression($dqlAlias, $partialFieldSet, $selectExpression->fieldIdentificationVariable ?: null));
+        }
 
-                if (! isset($this->selectedClasses[$dqlAlias])) {
-                    $this->selectedClasses[$dqlAlias] = [
-                        'class'       => $class,
-                        'dqlAlias'    => $dqlAlias,
-                        'resultAlias' => $resultAlias,
-                    ];
-                }
+        return $sql;
+    }
 
-                $sqlParts = [];
+    /**
+     * Walks down an Object Expression AST node and return Sql Parts
+     *
+     * @param mixed[] $partialFieldSet
+     *
+     * @return string[]
+     */
+    public function walkObjectExpression(string $dqlAlias, array $partialFieldSet, string|null $resultAlias): array
+    {
+        $class = $this->getMetadataForDqlAlias($dqlAlias);
 
-                // Select all fields from the queried class
-                foreach ($class->fieldMappings as $fieldName => $mapping) {
-                    if ($partialFieldSet && ! in_array($fieldName, $partialFieldSet, true)) {
+        if (! isset($this->selectedClasses[$dqlAlias])) {
+            $this->selectedClasses[$dqlAlias] = [
+                'class'       => $class,
+                'dqlAlias'    => $dqlAlias,
+                'resultAlias' => $resultAlias,
+            ];
+        }
+
+        $sqlParts = [];
+
+        // Select all fields from the queried class
+        foreach ($class->fieldMappings as $fieldName => $mapping) {
+            if ($partialFieldSet && ! in_array($fieldName, $partialFieldSet, true)) {
+                continue;
+            }
+
+            $tableName = isset($mapping->inherited)
+                ? $this->em->getClassMetadata($mapping->inherited)->getTableName()
+                : $class->getTableName();
+
+            $sqlTableAlias    = $this->getSQLTableAlias($tableName, $dqlAlias);
+            $columnAlias      = $this->getSQLColumnAlias($mapping->columnName);
+            $quotedColumnName = $this->quoteStrategy->getColumnName($fieldName, $class, $this->platform);
+
+            $col = $sqlTableAlias . '.' . $quotedColumnName;
+
+            $type = Type::getType($mapping->type);
+            $col  = $type->convertToPHPValueSQL($col, $this->platform);
+
+            $sqlParts[] = $col . ' AS ' . $columnAlias;
+
+            $this->scalarResultAliasMap[$resultAlias][] = $columnAlias;
+
+            $this->rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $class->name);
+
+            if (! empty($mapping->enumType)) {
+                $this->rsm->addEnumResult($columnAlias, $mapping->enumType);
+            }
+        }
+
+        // Add any additional fields of subclasses (excluding inherited fields)
+        // 1) on Single Table Inheritance: always, since its marginal overhead
+        // 2) on Class Table Inheritance only if partial objects are disallowed,
+        //    since it requires outer joining subtables.
+        if ($class->isInheritanceTypeSingleTable() || ! $this->query->getHint(Query::HINT_FORCE_PARTIAL_LOAD)) {
+            foreach ($class->subClasses as $subClassName) {
+                $subClass      = $this->em->getClassMetadata($subClassName);
+                $sqlTableAlias = $this->getSQLTableAlias($subClass->getTableName(), $dqlAlias);
+
+                foreach ($subClass->fieldMappings as $fieldName => $mapping) {
+                    if (isset($mapping->inherited) || ($partialFieldSet && ! in_array($fieldName, $partialFieldSet, true))) {
                         continue;
                     }
 
-                    $tableName = isset($mapping->inherited)
-                        ? $this->em->getClassMetadata($mapping->inherited)->getTableName()
-                        : $class->getTableName();
-
-                    $sqlTableAlias    = $this->getSQLTableAlias($tableName, $dqlAlias);
                     $columnAlias      = $this->getSQLColumnAlias($mapping->columnName);
-                    $quotedColumnName = $this->quoteStrategy->getColumnName($fieldName, $class, $this->platform);
+                    $quotedColumnName = $this->quoteStrategy->getColumnName($fieldName, $subClass, $this->platform);
 
                     $col = $sqlTableAlias . '.' . $quotedColumnName;
 
@@ -1392,48 +1447,12 @@ class SqlWalker
 
                     $this->scalarResultAliasMap[$resultAlias][] = $columnAlias;
 
-                    $this->rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $class->name);
-
-                    if (! empty($mapping->enumType)) {
-                        $this->rsm->addEnumResult($columnAlias, $mapping->enumType);
-                    }
+                    $this->rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $subClassName);
                 }
-
-                // Add any additional fields of subclasses (excluding inherited fields)
-                // 1) on Single Table Inheritance: always, since its marginal overhead
-                // 2) on Class Table Inheritance only if partial objects are disallowed,
-                //    since it requires outer joining subtables.
-                if ($class->isInheritanceTypeSingleTable() || ! $this->query->getHint(Query::HINT_FORCE_PARTIAL_LOAD)) {
-                    foreach ($class->subClasses as $subClassName) {
-                        $subClass      = $this->em->getClassMetadata($subClassName);
-                        $sqlTableAlias = $this->getSQLTableAlias($subClass->getTableName(), $dqlAlias);
-
-                        foreach ($subClass->fieldMappings as $fieldName => $mapping) {
-                            if (isset($mapping->inherited) || ($partialFieldSet && ! in_array($fieldName, $partialFieldSet, true))) {
-                                continue;
-                            }
-
-                            $columnAlias      = $this->getSQLColumnAlias($mapping->columnName);
-                            $quotedColumnName = $this->quoteStrategy->getColumnName($fieldName, $subClass, $this->platform);
-
-                            $col = $sqlTableAlias . '.' . $quotedColumnName;
-
-                            $type = Type::getType($mapping->type);
-                            $col  = $type->convertToPHPValueSQL($col, $this->platform);
-
-                            $sqlParts[] = $col . ' AS ' . $columnAlias;
-
-                            $this->scalarResultAliasMap[$resultAlias][] = $columnAlias;
-
-                            $this->rsm->addFieldResult($dqlAlias, $columnAlias, $fieldName, $subClassName);
-                        }
-                    }
-                }
-
-                $sql .= implode(', ', $sqlParts);
+            }
         }
 
-        return $sql;
+        return $sqlParts;
     }
 
     public function walkQuantifiedExpression(AST\QuantifiedExpression $qExpr): string
@@ -1549,6 +1568,14 @@ class SqlWalker
                     $sqlSelectExpressions[] = trim($e->dispatch($this)) . ' AS ' . $columnAlias;
                     break;
 
+                case $e instanceof AST\EntityAsDtoArgumentExpression:
+                    $alias                                             = $e->identificationVariable ?: $columnAlias;
+                    $this->rsm->nestedNewObjectArguments[$columnAlias] = ['ownerIndex' => $objIndex, 'argIndex' => $argIndex, 'argAlias' => $alias];
+                    $this->rsm->nestedEntities[$alias]                 = ['parent' => $objIndex, 'argIndex' => $argIndex, 'type' => 'entity'];
+
+                    $sqlSelectExpressions[] = trim($e->dispatch($this));
+                    break;
+
                 default:
                     $sqlSelectExpressions[] = trim($e->dispatch($this)) . ' AS ' . $columnAlias;
                     break;

src/QueryBuilder.php

@@ -9,7 +9,6 @@ use Doctrine\Common\Collections\Criteria;
 use Doctrine\DBAL\ArrayParameterType;
 use Doctrine\DBAL\ParameterType;
 use Doctrine\ORM\Internal\NoUnknownNamedArguments;
-use Doctrine\ORM\Internal\QueryType;
 use Doctrine\ORM\Query\Expr;
 use Doctrine\ORM\Query\Parameter;
 use Doctrine\ORM\Query\QueryExpressionVisitor;
@@ -128,6 +127,11 @@ class QueryBuilder implements Stringable
         $this->parameters = new ArrayCollection();
     }
 
+    final protected function getType(): QueryType
+    {
+        return $this->type;
+    }
+
     /**
      * Gets an ExpressionBuilder used for object-oriented construction of query expressions.
      * This producer method is intended for convenient inline usage. Example:

src/QueryType.php

@@ -2,9 +2,8 @@
 
 declare(strict_types=1);
 
-namespace Doctrine\ORM\Internal;
+namespace Doctrine\ORM;
 
-/** @internal To be used inside the QueryBuilder only. */
 enum QueryType
 {
     case Select;

src/Tools/Console/ApplicationCompatibility.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Tools\Console;
+
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Command\Command;
+
+use function method_exists;
+
+/**
+ * Forward compatibility with Symfony Console 7.4
+ *
+ * @internal
+ */
+trait ApplicationCompatibility
+{
+    private static function addCommandToApplication(Application $application, Command $command): Command|null
+    {
+        if (method_exists(Application::class, 'addCommand')) {
+            // @phpstan-ignore method.notFound (This method will be added in Symfony 7.4)
+            return $application->addCommand($command);
+        }
+
+        return $application->add($command);
+    }
+}

src/Tools/Console/ConsoleRunner.php

@@ -19,6 +19,8 @@ use function class_exists;
  */
 final class ConsoleRunner
 {
+    use ApplicationCompatibility;
+
     /**
      * Runs console with the given helper set.
      *
@@ -59,7 +61,10 @@ final class ConsoleRunner
         $connectionProvider = new ConnectionFromManagerProvider($entityManagerProvider);
 
         if (class_exists(DBALConsole\Command\ReservedWordsCommand::class)) {
-            $cli->add(new DBALConsole\Command\ReservedWordsCommand($connectionProvider));
+            self::addCommandToApplication(
+                $cli,
+                new DBALConsole\Command\ReservedWordsCommand($connectionProvider),
+            );
         }
 
         $cli->addCommands(

src/Tools/SchemaTool.php

@@ -718,6 +718,10 @@ class SchemaTool
             if (isset($joinColumn->onDelete)) {
                 $fkOptions['onDelete'] = $joinColumn->onDelete;
             }
+
+            if (isset($joinColumn->deferrable)) {
+                $fkOptions['deferrable'] = $joinColumn->deferrable;
+            }
         }
 
         // Prefer unique constraints over implicit simple indexes created for foreign keys.

src/Tools/SchemaValidator.php

@@ -31,7 +31,6 @@ use function array_map;
 use function array_push;
 use function array_search;
 use function array_values;
-use function assert;
 use function class_exists;
 use function class_parents;
 use function count;
@@ -329,9 +328,8 @@ class SchemaValidator
             array_filter(
                 array_map(
                     function (FieldMapping $fieldMapping) use ($class): string|null {
-                        $fieldName = $fieldMapping->fieldName;
-                        assert(isset($class->reflFields[$fieldName]));
-                        $propertyType = $class->reflFields[$fieldName]->getType();
+                        $fieldName    = $fieldMapping->fieldName;
+                        $propertyType = $class->propertyAccessors[$fieldName]->getUnderlyingReflector()->getType();
 
                         // If the field type is not a built-in type, we cannot check it
                         if (! Type::hasType($fieldMapping->type)) {

src/UnitOfWork.php

@@ -586,7 +586,7 @@ class UnitOfWork implements PropertyChangedListener
 
         $actualData = [];
 
-        foreach ($class->reflFields as $name => $refProp) {
+        foreach ($class->propertyAccessors as $name => $refProp) {
             $value = $refProp->getValue($entity);
 
             if ($class->isCollectionValuedAssociation($name) && $value !== null) {
@@ -706,7 +706,7 @@ class UnitOfWork implements PropertyChangedListener
 
                         $newValue = clone $actualValue;
                         $newValue->setOwner($entity, $assoc);
-                        $class->reflFields[$propName]->setValue($entity, $newValue);
+                        $class->propertyAccessors[$propName]->setValue($entity, $newValue);
                     }
                 }
 
@@ -745,7 +745,7 @@ class UnitOfWork implements PropertyChangedListener
 
         // Look for changes in associations of the entity
         foreach ($class->associationMappings as $field => $assoc) {
-            $val = $class->reflFields[$field]->getValue($entity);
+            $val = $class->propertyAccessors[$field]->getValue($entity);
             if ($val === null) {
                 continue;
             }
@@ -981,7 +981,7 @@ class UnitOfWork implements PropertyChangedListener
 
         $actualData = [];
 
-        foreach ($class->reflFields as $name => $refProp) {
+        foreach ($class->propertyAccessors as $name => $refProp) {
             if (
                 ( ! $class->isIdentifier($name) || ! $class->isIdGeneratorIdentity())
                 && ($name !== $class->versionField)
@@ -1167,7 +1167,7 @@ class UnitOfWork implements PropertyChangedListener
             // is obtained by a new entity because the old one went out of scope.
             //$this->entityStates[$oid] = self::STATE_NEW;
             if (! $class->isIdentifierNatural()) {
-                $class->reflFields[$class->identifier[0]]->setValue($entity, null);
+                $class->propertyAccessors[$class->identifier[0]]->setValue($entity, null);
             }
 
             if ($invoke !== ListenersInvoker::INVOKE_NONE) {
@@ -2029,7 +2029,7 @@ class UnitOfWork implements PropertyChangedListener
         );
 
         foreach ($associationMappings as $assoc) {
-            $relatedEntities = $class->reflFields[$assoc->fieldName]->getValue($entity);
+            $relatedEntities = $class->propertyAccessors[$assoc->fieldName]->getValue($entity);
 
             switch (true) {
                 case $relatedEntities instanceof PersistentCollection:
@@ -2070,7 +2070,7 @@ class UnitOfWork implements PropertyChangedListener
         );
 
         foreach ($associationMappings as $assoc) {
-            $relatedEntities = $class->reflFields[$assoc->fieldName]->getValue($entity);
+            $relatedEntities = $class->propertyAccessors[$assoc->fieldName]->getValue($entity);
 
             switch (true) {
                 case $relatedEntities instanceof PersistentCollection:
@@ -2116,7 +2116,7 @@ class UnitOfWork implements PropertyChangedListener
         );
 
         foreach ($associationMappings as $assoc) {
-            $relatedEntities = $class->reflFields[$assoc->fieldName]->getValue($entity);
+            $relatedEntities = $class->propertyAccessors[$assoc->fieldName]->getValue($entity);
 
             switch (true) {
                 case $relatedEntities instanceof PersistentCollection:
@@ -2179,7 +2179,7 @@ class UnitOfWork implements PropertyChangedListener
         $entitiesToCascade = [];
 
         foreach ($associationMappings as $assoc) {
-            $relatedEntities = $class->reflFields[$assoc->fieldName]->getValue($entity);
+            $relatedEntities = $class->propertyAccessors[$assoc->fieldName]->getValue($entity);
 
             switch (true) {
                 case $relatedEntities instanceof Collection:
@@ -2235,7 +2235,7 @@ class UnitOfWork implements PropertyChangedListener
                 $this->initializeObject($entity);
 
                 assert($class->versionField !== null);
-                $entityVersion = $class->reflFields[$class->versionField]->getValue($entity);
+                $entityVersion = $class->propertyAccessors[$class->versionField]->getValue($entity);
 
                 // phpcs:ignore SlevomatCodingStandard.Operators.DisallowEqualOperators.DisallowedNotEqualOperator
                 if ($entityVersion != $lockVersion) {
@@ -2379,7 +2379,11 @@ class UnitOfWork implements PropertyChangedListener
             }
 
             if ($this->isUninitializedObject($entity)) {
-                $entity->__setInitialized(true);
+                if ($this->em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+                    $class->reflClass->markLazyObjectAsInitialized($entity);
+                } else {
+                    $entity->__setInitialized(true);
+                }
 
                 Hydrator::hydrate($entity, (array) $class->reflClass->newInstanceWithoutConstructor());
             } else {
@@ -2404,7 +2408,7 @@ class UnitOfWork implements PropertyChangedListener
 
         foreach ($data as $field => $value) {
             if (isset($class->fieldMappings[$field])) {
-                $class->reflFields[$field]->setValue($entity, $value);
+                $class->propertyAccessors[$field]->setValue($entity, $value);
             }
         }
 
@@ -2434,21 +2438,21 @@ class UnitOfWork implements PropertyChangedListener
                         if (isset($data[$field]) && is_object($data[$field]) && isset($this->entityStates[spl_object_id($data[$field])])) {
                             $this->originalEntityData[$oid][$field] = $data[$field];
 
-                            $class->reflFields[$field]->setValue($entity, $data[$field]);
-                            $targetClass->reflFields[$assoc->mappedBy]->setValue($data[$field], $entity);
+                            $class->propertyAccessors[$field]->setValue($entity, $data[$field]);
+                            $targetClass->propertyAccessors[$assoc->mappedBy]->setValue($data[$field], $entity);
 
                             continue 2;
                         }
 
                         // Inverse side of x-to-one can never be lazy
-                        $class->reflFields[$field]->setValue($entity, $this->getEntityPersister($assoc->targetEntity)->loadOneToOneEntity($assoc, $entity));
+                        $class->propertyAccessors[$field]->setValue($entity, $this->getEntityPersister($assoc->targetEntity)->loadOneToOneEntity($assoc, $entity));
 
                         continue 2;
                     }
 
                     // use the entity association
                     if (isset($data[$field]) && is_object($data[$field]) && isset($this->entityStates[spl_object_id($data[$field])])) {
-                        $class->reflFields[$field]->setValue($entity, $data[$field]);
+                        $class->propertyAccessors[$field]->setValue($entity, $data[$field]);
                         $this->originalEntityData[$oid][$field] = $data[$field];
 
                         break;
@@ -2480,7 +2484,7 @@ class UnitOfWork implements PropertyChangedListener
 
                     if (! $associatedId) {
                         // Foreign key is NULL
-                        $class->reflFields[$field]->setValue($entity, null);
+                        $class->propertyAccessors[$field]->setValue($entity, null);
                         $this->originalEntityData[$oid][$field] = null;
 
                         break;
@@ -2546,11 +2550,11 @@ class UnitOfWork implements PropertyChangedListener
                     }
 
                     $this->originalEntityData[$oid][$field] = $newValue;
-                    $class->reflFields[$field]->setValue($entity, $newValue);
+                    $class->propertyAccessors[$field]->setValue($entity, $newValue);
 
                     if ($assoc->inversedBy !== null && $assoc->isOneToOne() && $newValue !== null) {
                         $inverseAssoc = $targetClass->associationMappings[$assoc->inversedBy];
-                        $targetClass->reflFields[$inverseAssoc->fieldName]->setValue($newValue, $entity);
+                        $targetClass->propertyAccessors[$inverseAssoc->fieldName]->setValue($newValue, $entity);
                     }
 
                     break;
@@ -2566,7 +2570,7 @@ class UnitOfWork implements PropertyChangedListener
                     if (isset($data[$field]) && $data[$field] instanceof PersistentCollection) {
                         $data[$field]->setOwner($entity, $assoc);
 
-                        $class->reflFields[$field]->setValue($entity, $data[$field]);
+                        $class->propertyAccessors[$field]->setValue($entity, $data[$field]);
                         $this->originalEntityData[$oid][$field] = $data[$field];
 
                         break;
@@ -2577,7 +2581,7 @@ class UnitOfWork implements PropertyChangedListener
                     $pColl->setOwner($entity, $assoc);
                     $pColl->setInitialized(false);
 
-                    $reflField = $class->reflFields[$field];
+                    $reflField = $class->propertyAccessors[$field];
                     $reflField->setValue($entity, $pColl);
 
                     if ($hints['fetchMode'][$class->name][$field] === ClassMetadata::FETCH_EAGER) {
@@ -2657,7 +2661,7 @@ class UnitOfWork implements PropertyChangedListener
             $found = $this->getEntityPersister($targetEntity)->loadAll([$mappedBy => $entities], $mapping->orderBy);
 
             $targetClass    = $this->em->getClassMetadata($targetEntity);
-            $targetProperty = $targetClass->getReflectionProperty($mappedBy);
+            $targetProperty = $targetClass->getPropertyAccessor($mappedBy);
             assert($targetProperty !== null);
 
             foreach ($found as $targetValue) {
@@ -2679,7 +2683,7 @@ class UnitOfWork implements PropertyChangedListener
                 $idHash = implode(' ', $id);
 
                 if ($mapping->indexBy !== null) {
-                    $indexByProperty = $targetClass->getReflectionProperty($mapping->indexBy);
+                    $indexByProperty = $targetClass->getPropertyAccessor($mapping->indexBy);
                     assert($indexByProperty !== null);
                     $collectionBatch[$idHash]->hydrateSet($indexByProperty->getValue($targetValue), $targetValue);
                 } else {
@@ -3036,6 +3040,13 @@ class UnitOfWork implements PropertyChangedListener
 
         if ($obj instanceof PersistentCollection) {
             $obj->initialize();
+
+            return;
+        }
+
+        if ($this->em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            $reflection = $this->em->getClassMetadata($obj::class)->getReflectionClass();
+            $reflection->initializeLazyObject($obj);
         }
     }
 
@@ -3046,6 +3057,10 @@ class UnitOfWork implements PropertyChangedListener
      */
     public function isUninitializedObject(mixed $obj): bool
     {
+        if ($this->em->getConfiguration()->isNativeLazyObjectsEnabled() && ! ($obj instanceof Collection) && is_object($obj)) {
+            return $this->em->getClassMetadata($obj::class)->reflClass->isUninitializedLazyObject($obj);
+        }
+
         return $obj instanceof InternalProxy && ! $obj->__isInitialized();
     }
 
@@ -3244,7 +3259,7 @@ class UnitOfWork implements PropertyChangedListener
         $idValue = $this->convertSingleFieldIdentifierToPHPValue($class, $generatedId);
         $oid     = spl_object_id($entity);
 
-        $class->reflFields[$idField]->setValue($entity, $idValue);
+        $class->propertyAccessors[$idField]->setValue($entity, $idValue);
 
         $this->entityIdentifiers[$oid]            = [$idField => $idValue];
         $this->entityStates[$oid]                 = self::STATE_MANAGED;

tests/Tests/Models/PropertyHooks/MappingVirtualProperty.php

@@ -0,0 +1,32 @@
+<?php
+// phpcs:ignoreFile
+namespace Doctrine\Tests\Models\PropertyHooks;
+
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping\Column;
+use Doctrine\ORM\Mapping\Entity;
+use Doctrine\ORM\Mapping\GeneratedValue;
+use Doctrine\ORM\Mapping\Id;
+use Doctrine\ORM\Mapping\Table;
+
+#[Entity]
+#[Table(name: 'property_hooks_user')]
+class MappingVirtualProperty
+{
+    #[Id, GeneratedValue, Column(type: Types::INTEGER)]
+    public ?int $id;
+
+    #[Column(type: Types::STRING)]
+    public string $first;
+
+    #[Column(type: Types::STRING)]
+    public string $last;
+
+    #[Column(type: Types::STRING)]
+    public string $fullName {
+        get => $this->first . " " . $this->last;
+        set {
+            [$this->first, $this->last] = explode(' ', $value, 2);
+        }
+    }
+}

tests/Tests/Models/PropertyHooks/User.php

@@ -0,0 +1,56 @@
+<?php
+// phpcs:ignoreFile
+namespace Doctrine\Tests\Models\PropertyHooks;
+
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping\Column;
+use Doctrine\ORM\Mapping\Entity;
+use Doctrine\ORM\Mapping\GeneratedValue;
+use Doctrine\ORM\Mapping\Id;
+use Doctrine\ORM\Mapping\Table;
+
+#[Entity]
+#[Table(name: 'property_hooks_user')]
+class User
+{
+    #[Id, GeneratedValue, Column(type: Types::INTEGER)]
+    public ?int $id;
+
+    #[Column(type: Types::STRING)]
+    public string $first {
+        set {
+            if (strlen($value) === 0) {
+                throw new ValueError("Name must be non-empty");
+            }
+            $this->first = $value;
+        }
+    }
+
+    #[Column(type: Types::STRING)]
+    public string $last {
+        set {
+            if (strlen($value) === 0) {
+                throw new ValueError("Name must be non-empty");
+            }
+            $this->last = $value;
+        }
+    }
+
+    public string $fullName {
+        get => $this->first . " " . $this->last;
+        set {
+            [$this->first, $this->last] = explode(' ', $value, 2);
+        }
+    }
+
+    #[Column(type: Types::STRING)]
+    public string $language = 'de' {
+        // Override the "read" action with arbitrary logic.
+        get => strtoupper($this->language);
+
+        // Override the "write" action with arbitrary logic.
+        set {
+            $this->language = strtolower($value);
+        }
+    }
+}

tests/Tests/ORM/EntityManagerTest.php

@@ -25,9 +25,10 @@ use Generator;
 use PHPUnit\Framework\Assert;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\Attributes\RequiresPhp;
+use ReflectionClass;
 use ReflectionProperty;
 use stdClass;
-use Symfony\Component\VarExporter\LazyGhostTrait;
 use TypeError;
 
 class EntityManagerTest extends OrmTestCase
@@ -180,17 +181,12 @@ class EntityManagerTest extends OrmTestCase
     }
 
     /** Resetting the EntityManager relies on lazy objects until https://github.com/doctrine/orm/issues/5933 is resolved */
+    #[RequiresPhp('8.4')]
     public function testLazyGhostEntityManager(): void
     {
-        $em = new class () extends EntityManager {
-            use LazyGhostTrait;
+        $reflector = new ReflectionClass(EntityManager::class);
 
-            public function __construct()
-            {
-            }
-        };
-
-        $em = $em::createLazyGhost(static function ($em): void {
+        $em = $reflector->newLazyGhost($initializer = static function (EntityManager $em): void {
             $r = new ReflectionProperty(EntityManager::class, 'unitOfWork');
             $r->setValue($em, new class () extends UnitOfWork {
                 public function __construct()
@@ -207,7 +203,7 @@ class EntityManagerTest extends OrmTestCase
         $em->close();
         $this->assertFalse($em->isOpen());
 
-        $em->resetLazyObject();
+        $reflector->resetAsLazyGhost($em, $initializer);
         $this->assertTrue($em->isOpen());
     }
 

tests/Tests/ORM/Functional/BasicFunctionalTest.php

@@ -9,7 +9,6 @@ use Doctrine\ORM\Exception\EntityIdentityCollisionException;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\ORMInvalidArgumentException;
 use Doctrine\ORM\PersistentCollection;
-use Doctrine\ORM\Proxy\InternalProxy;
 use Doctrine\ORM\Query;
 use Doctrine\ORM\UnitOfWork;
 use Doctrine\Tests\IterableTester;
@@ -557,7 +556,7 @@ class BasicFunctionalTest extends OrmFunctionalTestCase
         $this->_em->persist($article);
         $this->_em->flush();
 
-        self::assertFalse($userRef->__isInitialized());
+        self::assertTrue($this->isUninitializedObject($userRef));
 
         $this->_em->clear();
 
@@ -592,7 +591,7 @@ class BasicFunctionalTest extends OrmFunctionalTestCase
         $this->_em->persist($user);
         $this->_em->flush();
 
-        self::assertFalse($groupRef->__isInitialized());
+        self::assertTrue($this->isUninitializedObject($groupRef));
 
         $this->_em->clear();
 
@@ -940,8 +939,7 @@ class BasicFunctionalTest extends OrmFunctionalTestCase
                              ->setParameter(1, $article->id)
                              ->setFetchMode(CmsArticle::class, 'user', ClassMetadata::FETCH_EAGER)
                              ->getSingleResult();
-        self::assertInstanceOf(InternalProxy::class, $article->user, 'It IS a proxy, ...');
-        self::assertFalse($this->isUninitializedObject($article->user), '...but its initialized!');
+        self::assertFalse($this->isUninitializedObject($article->user));
         $this->assertQueryCount(2);
     }
 

tests/Tests/ORM/Functional/EnumTest.php

@@ -470,7 +470,7 @@ EXCEPTION
     public function testItAllowsReadingAttributes(): void
     {
         $metadata = $this->_em->getClassMetadata(Card::class);
-        $property = $metadata->getReflectionProperty('suit');
+        $property = $metadata->propertyAccessors['suit']->getUnderlyingReflector();
 
         $attributes = $property->getAttributes();
 

tests/Tests/ORM/Functional/InvalidMappingDefinitionTest.php

@@ -0,0 +1,133 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional;
+
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+use Doctrine\ORM\Mapping\Entity;
+use Doctrine\ORM\Mapping\MappingException;
+use Doctrine\ORM\Mapping\Table;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+/**
+ * Functional tests for the Class Table Inheritance mapping strategy.
+ */
+class InvalidMappingDefinitionTest extends OrmFunctionalTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+    }
+
+    public function testManyToManyRelationWithJoinTableOnTheWrongSide(): void
+    {
+        $this->expectException(MappingException::class);
+        $this->expectExceptionMessage("Mapping error on field 'owners' in Doctrine\Tests\ORM\Functional\OwnedSideEntity : 'joinTable' can only be set on many-to-many owning side.");
+
+        $this->createSchemaForModels(
+            OwningSideEntity::class,
+            OwnedSideEntity::class,
+        );
+    }
+}
+
+#[Table(name: 'owning_side_entities1')]
+#[Entity]
+class OwningSideEntity
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\ManyToMany(targetEntity: OwnedSideEntity::class, inversedBy: 'owners')]
+    #[ORM\JoinTable(name: 'owning_owned')]
+    private Collection $relations;
+
+    public function __construct()
+    {
+        $this->relations = new ArrayCollection();
+    }
+
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    public function getRelations(): Collection
+    {
+        return $this->relations;
+    }
+
+    public function addRelation(OwnedSideEntity $ownedSide): void
+    {
+        if (! $this->relations->contains($ownedSide)) {
+            $this->relations->add($ownedSide);
+            $ownedSide->addOwner($this);
+        }
+    }
+
+    public function removeRelation(OwnedSideEntity $ownedSide): void
+    {
+        if ($this->relations->removeElement($ownedSide)) {
+            $ownedSide->removeOwner($this);
+        }
+    }
+}
+
+#[Table(name: 'owned_side_entities1')]
+#[Entity]
+class OwnedSideEntity
+{
+    #[ORM\Id]
+    #[ORM\GeneratedValue]
+    #[ORM\Column(type: 'integer')]
+    private int $id;
+
+    #[ORM\Column(type: 'string', length: 255)]
+    private string $data;
+
+    #[ORM\ManyToMany(targetEntity: OwningSideEntity::class, mappedBy: 'relations')]
+    #[ORM\JoinTable(name: 'owning_owned')]
+    private Collection $owners;
+
+    public function __construct()
+    {
+        $this->owners = new ArrayCollection();
+    }
+
+    public function getId(): int
+    {
+        return $this->id;
+    }
+
+    public function getData(): string
+    {
+        return $this->data;
+    }
+
+    public function setData(string $data): void
+    {
+        $this->data = $data;
+    }
+
+    public function getOwners(): Collection
+    {
+        return $this->owners;
+    }
+
+    public function addOwner(OwningSideEntity $owningSide): void
+    {
+        if (! $this->owners->contains($owningSide)) {
+            $this->owners->add($owningSide);
+        }
+    }
+
+    public function removeOwner(OwningSideEntity $owningSide): void
+    {
+        $this->owners->removeElement($owningSide);
+    }
+}

tests/Tests/ORM/Functional/LifecycleCallbackTest.php

@@ -134,7 +134,7 @@ class LifecycleCallbackTest extends OrmFunctionalTestCase
         LifecycleCallbackTestEntity::$postLoadCallbackInvoked = false; // Reset the tracking of the postLoad invocation
 
         $reference = $this->_em->getReference(LifecycleCallbackTestEntity::class, $id);
-        self::assertFalse($reference::$postLoadCallbackInvoked);
+        self::assertArrayNotHasKey('postLoadCallbackInvoked', (array) $reference);
         $this->assertTrue($this->isUninitializedObject($reference));
 
         $reference->getValue(); // trigger proxy load

tests/Tests/ORM/Functional/NewOperatorTest.php

@@ -1230,6 +1230,170 @@ class NewOperatorTest extends OrmFunctionalTestCase
         self::assertSame($this->fixtures[2]->address->zip, $result[2]->val2->zip);
     }
 
+    public function testEntityInDtoWithRoot(): void
+    {
+        $dql = '
+            SELECT
+                new CmsDumbDTO(
+                    u.id,
+                    u,
+                    a,
+                    e.email
+                )
+            FROM
+                Doctrine\Tests\Models\CMS\CmsUser u
+            LEFT JOIN
+                u.email e
+            LEFT JOIN
+                u.address a
+            ORDER BY
+                u.name';
+
+        $query  = $this->getEntityManager()->createQuery($dql);
+        $result = $query->getResult();
+
+        self::assertCount(3, $result);
+
+        self::assertInstanceOf(CmsDumbDTO::class, $result[0]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[1]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[2]);
+
+        self::assertInstanceOf(CmsUser::class, $result[0]->val2);
+        self::assertInstanceOf(CmsUser::class, $result[1]->val2);
+        self::assertInstanceOf(CmsUser::class, $result[2]->val2);
+
+        self::assertSame($this->fixtures[0]->name, $result[0]->val2->name);
+        self::assertSame($this->fixtures[1]->name, $result[1]->val2->name);
+        self::assertSame($this->fixtures[2]->name, $result[2]->val2->name);
+
+        self::assertSame($this->fixtures[0]->username, $result[0]->val2->username);
+        self::assertSame($this->fixtures[1]->username, $result[1]->val2->username);
+        self::assertSame($this->fixtures[2]->username, $result[2]->val2->username);
+
+        self::assertSame($this->fixtures[0]->status, $result[0]->val2->status);
+        self::assertSame($this->fixtures[1]->status, $result[1]->val2->status);
+        self::assertSame($this->fixtures[2]->status, $result[2]->val2->status);
+
+        self::assertInstanceOf(CmsAddress::class, $result[0]->val3);
+        self::assertInstanceOf(CmsAddress::class, $result[1]->val3);
+        self::assertInstanceOf(CmsAddress::class, $result[2]->val3);
+
+        self::assertSame($this->fixtures[0]->address->city, $result[0]->val3->city);
+        self::assertSame($this->fixtures[1]->address->city, $result[1]->val3->city);
+        self::assertSame($this->fixtures[2]->address->city, $result[2]->val3->city);
+
+        self::assertSame($this->fixtures[0]->address->country, $result[0]->val3->country);
+        self::assertSame($this->fixtures[1]->address->country, $result[1]->val3->country);
+        self::assertSame($this->fixtures[2]->address->country, $result[2]->val3->country);
+
+        self::assertSame($this->fixtures[0]->email->email, $result[0]->val4);
+        self::assertSame($this->fixtures[1]->email->email, $result[1]->val4);
+        self::assertSame($this->fixtures[2]->email->email, $result[2]->val4);
+    }
+
+    public function testEntityInDtoWithoutRoot(): void
+    {
+        $dql = '
+            SELECT
+                new CmsDumbDTO(
+                    u.id,
+                    u.name,
+                    a,
+                    e.email
+                )
+            FROM
+                Doctrine\Tests\Models\CMS\CmsUser u
+            LEFT JOIN
+                u.email e
+            LEFT JOIN
+                u.address a
+            ORDER BY
+                u.name';
+
+        $query  = $this->getEntityManager()->createQuery($dql);
+        $result = $query->getResult();
+
+        self::assertCount(3, $result);
+
+        self::assertInstanceOf(CmsDumbDTO::class, $result[0]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[1]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[2]);
+
+        self::assertSame($this->fixtures[0]->name, $result[0]->val2);
+        self::assertSame($this->fixtures[1]->name, $result[1]->val2);
+        self::assertSame($this->fixtures[2]->name, $result[2]->val2);
+
+        self::assertInstanceOf(CmsAddress::class, $result[0]->val3);
+        self::assertInstanceOf(CmsAddress::class, $result[1]->val3);
+        self::assertInstanceOf(CmsAddress::class, $result[2]->val3);
+
+        self::assertSame($this->fixtures[0]->address->city, $result[0]->val3->city);
+        self::assertSame($this->fixtures[1]->address->city, $result[1]->val3->city);
+        self::assertSame($this->fixtures[2]->address->city, $result[2]->val3->city);
+
+        self::assertSame($this->fixtures[0]->address->country, $result[0]->val3->country);
+        self::assertSame($this->fixtures[1]->address->country, $result[1]->val3->country);
+        self::assertSame($this->fixtures[2]->address->country, $result[2]->val3->country);
+
+        self::assertSame($this->fixtures[0]->email->email, $result[0]->val4);
+        self::assertSame($this->fixtures[1]->email->email, $result[1]->val4);
+        self::assertSame($this->fixtures[2]->email->email, $result[2]->val4);
+    }
+
+    public function testOnlyObjectInDto(): void
+    {
+        $dql = '
+            SELECT
+                new CmsDumbDTO(
+                    a,
+                    new CmsDumbDTO(
+                        u.name,
+                        e.email
+                    )
+                )
+            FROM
+                Doctrine\Tests\Models\CMS\CmsUser u
+            LEFT JOIN
+                u.email e
+            LEFT JOIN
+                u.address a
+            ORDER BY
+                u.name';
+
+        $query  = $this->getEntityManager()->createQuery($dql);
+        $result = $query->getResult();
+
+        self::assertCount(3, $result);
+
+        self::assertInstanceOf(CmsDumbDTO::class, $result[0]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[1]);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[2]);
+
+        self::assertInstanceOf(CmsAddress::class, $result[0]->val1);
+        self::assertInstanceOf(CmsAddress::class, $result[1]->val1);
+        self::assertInstanceOf(CmsAddress::class, $result[2]->val1);
+
+        self::assertSame($this->fixtures[0]->address->city, $result[0]->val1->city);
+        self::assertSame($this->fixtures[1]->address->city, $result[1]->val1->city);
+        self::assertSame($this->fixtures[2]->address->city, $result[2]->val1->city);
+
+        self::assertSame($this->fixtures[0]->address->country, $result[0]->val1->country);
+        self::assertSame($this->fixtures[1]->address->country, $result[1]->val1->country);
+        self::assertSame($this->fixtures[2]->address->country, $result[2]->val1->country);
+
+        self::assertInstanceOf(CmsDumbDTO::class, $result[0]->val2);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[1]->val2);
+        self::assertInstanceOf(CmsDumbDTO::class, $result[2]->val2);
+
+        self::assertSame($this->fixtures[0]->name, $result[0]->val2->val1);
+        self::assertSame($this->fixtures[1]->name, $result[1]->val2->val1);
+        self::assertSame($this->fixtures[2]->name, $result[2]->val2->val1);
+
+        self::assertSame($this->fixtures[0]->email->email, $result[0]->val2->val2);
+        self::assertSame($this->fixtures[1]->email->email, $result[1]->val2->val2);
+        self::assertSame($this->fixtures[2]->email->email, $result[2]->val2->val2);
+    }
+
     public function testNamedArguments(): void
     {
         $dql = <<<'SQL'

tests/Tests/ORM/Functional/PropertyHooksTest.php

@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional;
+
+use Doctrine\DBAL\Platforms\AbstractMySQLPlatform;
+use Doctrine\ORM\Mapping\MappingException;
+use Doctrine\Tests\Models\PropertyHooks\MappingVirtualProperty;
+use Doctrine\Tests\Models\PropertyHooks\User;
+use Doctrine\Tests\OrmFunctionalTestCase;
+use PHPUnit\Framework\Attributes\RequiresPhp;
+
+#[RequiresPhp('>= 8.4.0')]
+class PropertyHooksTest extends OrmFunctionalTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        if ($this->_em->getConnection()->getDatabasePlatform() instanceof AbstractMySQLPlatform) {
+            self::markTestSkipped('MySQL/MariaDB is case-insensitive by default, and the logic of this test relies on case sensitivity.');
+        }
+
+        if (! $this->_em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            $this->markTestSkipped('Property hooks require native lazy objects to be enabled.');
+        }
+
+        $this->createSchemaForModels(
+            User::class,
+        );
+    }
+
+    public function testMapPropertyHooks(): void
+    {
+        $user           = new User();
+        $user->fullName = 'John Doe';
+        $user->language = 'EN';
+
+        $this->_em->persist($user);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $user = $this->_em->find(User::class, $user->id);
+
+        self::assertEquals('John', $user->first);
+        self::assertEquals('Doe', $user->last);
+        self::assertEquals('John Doe', $user->fullName);
+        self::assertEquals('EN', $user->language, 'The property hook uppercases the language.');
+
+        $language = $this->_em->createQuery('SELECT u.language FROM ' . User::class . ' u WHERE u.id = :id')
+            ->setParameter('id', $user->id)
+            ->getSingleScalarResult();
+
+        $this->assertEquals('en', $language, 'Selecting a field from DQL does not go through the property hook, accessing raw data.');
+
+        $this->_em->clear();
+
+        $user = $this->_em->getRepository(User::class)->findOneBy(['language' => 'EN']);
+
+        self::assertNull($user);
+
+        $user = $this->_em->getRepository(User::class)->findOneBy(['language' => 'en']);
+
+        self::assertNotNull($user);
+    }
+
+    public function testTriggerLazyLoadingWhenAccessingPropertyHooks(): void
+    {
+        $user           = new User();
+        $user->fullName = 'Ludwig von Beethoven';
+        $user->language = 'DE';
+
+        $this->_em->persist($user);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $user = $this->_em->getReference(User::class, $user->id);
+
+        $this->assertTrue($this->_em->getUnitOfWork()->isUninitializedObject($user));
+
+        self::assertEquals('Ludwig', $user->first);
+        self::assertEquals('von Beethoven', $user->last);
+        self::assertEquals('Ludwig von Beethoven', $user->fullName);
+        self::assertEquals('DE', $user->language, 'The property hook uppercases the language.');
+
+        $this->assertFalse($this->_em->getUnitOfWork()->isUninitializedObject($user));
+
+        $this->_em->clear();
+
+        $user = $this->_em->getReference(User::class, $user->id);
+
+        self::assertEquals('Ludwig von Beethoven', $user->fullName);
+    }
+
+    public function testMappingVirtualPropertyIsNotSupported(): void
+    {
+        $this->expectException(MappingException::class);
+        $this->expectExceptionMessage('Mapping virtual property "fullName" on entity "Doctrine\Tests\Models\PropertyHooks\MappingVirtualProperty" is not allowed.');
+
+        $this->_em->getClassMetadata(MappingVirtualProperty::class);
+    }
+}

tests/Tests/ORM/Functional/ProxiesLikeEntitiesTest.php

@@ -34,6 +34,10 @@ class ProxiesLikeEntitiesTest extends OrmFunctionalTestCase
     {
         parent::setUp();
 
+        if ($this->_em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            self::markTestSkipped('This test is not applicable when lazy proxy is enabled.');
+        }
+
         $this->createSchemaForModels(
             CmsUser::class,
             CmsTag::class,

tests/Tests/ORM/Functional/ReferenceProxyTest.php

@@ -6,7 +6,6 @@ namespace Doctrine\Tests\ORM\Functional;
 
 use Doctrine\Common\Proxy\Proxy as CommonProxy;
 use Doctrine\ORM\Proxy\DefaultProxyClassNameResolver;
-use Doctrine\ORM\Proxy\InternalProxy;
 use Doctrine\Tests\Models\Company\CompanyAuction;
 use Doctrine\Tests\Models\ECommerce\ECommerceProduct;
 use Doctrine\Tests\Models\ECommerce\ECommerceProduct2;
@@ -242,13 +241,16 @@ class ReferenceProxyTest extends OrmFunctionalTestCase
     #[Group('DDC-1604')]
     public function testCommonPersistenceProxy(): void
     {
+        if ($this->_em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            self::markTestSkipped('Test only works with proxy generation disabled.');
+        }
+
         $id = $this->createProduct();
 
         $entity = $this->_em->getReference(ECommerceProduct::class, $id);
         assert($entity instanceof ECommerceProduct);
         $className = DefaultProxyClassNameResolver::getClass($entity);
 
-        self::assertInstanceOf(InternalProxy::class, $entity);
         self::assertTrue($this->isUninitializedObject($entity));
         self::assertEquals(ECommerceProduct::class, $className);
 
@@ -257,7 +259,7 @@ class ReferenceProxyTest extends OrmFunctionalTestCase
         $proxyFileName = $this->_em->getConfiguration()->getProxyDir() . DIRECTORY_SEPARATOR . str_replace('\\', '', $restName) . '.php';
         self::assertTrue(file_exists($proxyFileName), 'Proxy file name cannot be found generically.');
 
-        $entity->__load();
+        $this->initializeObject($entity);
         self::assertFalse($this->isUninitializedObject($entity));
     }
 }

tests/Tests/ORM/Functional/SchemaTool/PostgreSqlSchemaToolTest.php

@@ -16,6 +16,7 @@ use Doctrine\Tests\OrmFunctionalTestCase;
 use PHPUnit\Framework\Attributes\Group;
 
 use function array_filter;
+use function array_values;
 use function implode;
 use function str_starts_with;
 
@@ -42,6 +43,20 @@ class PostgreSqlSchemaToolTest extends OrmFunctionalTestCase
 
         self::assertCount(0, $sql, implode("\n", $sql));
     }
+
+    public function testSetDeferrableForeignKey(): void
+    {
+        $schema = $this->getSchemaForModels(
+            EntityWithSelfReferencingAssociation::class,
+        );
+
+        $table = $schema->getTable('entitywithselfreferencingassociation');
+        $fks   = array_values($table->getForeignKeys());
+
+        self::assertCount(1, $fks);
+
+        self::assertTrue($fks[0]->getOption('deferrable'));
+    }
 }
 
 #[Table(name: 'stonewood.screen')]
@@ -98,3 +113,20 @@ class DDC1657Avatar
     #[Column(name: 'pk', type: 'integer', nullable: false)]
     private int $pk;
 }
+
+#[Table(name: 'entitywithselfreferencingassociation')]
+#[Entity]
+class EntityWithSelfReferencingAssociation
+{
+    /**
+     * Identifier
+     */
+    #[Id]
+    #[GeneratedValue(strategy: 'IDENTITY')]
+    #[Column(type: 'integer', nullable: false)]
+    private int $id;
+
+    #[ManyToOne(targetEntity: self::class)]
+    #[JoinColumn(deferrable: true)]
+    private self $parent;
+}

tests/Tests/ORM/Functional/SecondLevelCacheQueryCacheTest.php

@@ -11,7 +11,6 @@ use Doctrine\ORM\Cache\EntityCacheKey;
 use Doctrine\ORM\Cache\Exception\CacheException;
 use Doctrine\ORM\Cache\QueryCacheEntry;
 use Doctrine\ORM\Cache\QueryCacheKey;
-use Doctrine\ORM\Proxy\InternalProxy;
 use Doctrine\ORM\Query;
 use Doctrine\ORM\Query\ResultSetMapping;
 use Doctrine\Tests\Models\Cache\Attraction;
@@ -939,7 +938,6 @@ class SecondLevelCacheQueryCacheTest extends SecondLevelCacheFunctionalTestCase
         self::assertNotNull($state1->getCountry());
         $this->assertQueryCount(1);
         self::assertInstanceOf(State::class, $state1);
-        self::assertInstanceOf(InternalProxy::class, $state1->getCountry());
         self::assertEquals($countryName, $state1->getCountry()->getName());
         self::assertEquals($stateId, $state1->getId());
 
@@ -957,7 +955,6 @@ class SecondLevelCacheQueryCacheTest extends SecondLevelCacheFunctionalTestCase
         self::assertNotNull($state2->getCountry());
         $this->assertQueryCount(0);
         self::assertInstanceOf(State::class, $state2);
-        self::assertInstanceOf(InternalProxy::class, $state2->getCountry());
         self::assertEquals($countryName, $state2->getCountry()->getName());
         self::assertEquals($stateId, $state2->getId());
     }
@@ -1031,7 +1028,6 @@ class SecondLevelCacheQueryCacheTest extends SecondLevelCacheFunctionalTestCase
 
         $this->assertQueryCount(1);
         self::assertInstanceOf(State::class, $state1);
-        self::assertInstanceOf(InternalProxy::class, $state1->getCountry());
         self::assertInstanceOf(City::class, $state1->getCities()->get(0));
         self::assertInstanceOf(State::class, $state1->getCities()->get(0)->getState());
         self::assertSame($state1, $state1->getCities()->get(0)->getState());
@@ -1048,7 +1044,6 @@ class SecondLevelCacheQueryCacheTest extends SecondLevelCacheFunctionalTestCase
 
         $this->assertQueryCount(0);
         self::assertInstanceOf(State::class, $state2);
-        self::assertInstanceOf(InternalProxy::class, $state2->getCountry());
         self::assertInstanceOf(City::class, $state2->getCities()->get(0));
         self::assertInstanceOf(State::class, $state2->getCities()->get(0)->getState());
         self::assertSame($state2, $state2->getCities()->get(0)->getState());

tests/Tests/ORM/Functional/SecondLevelCacheRepositoryTest.php

@@ -4,7 +4,6 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Functional;
 
-use Doctrine\ORM\Proxy\InternalProxy;
 use Doctrine\Tests\Models\Cache\Country;
 use Doctrine\Tests\Models\Cache\State;
 use PHPUnit\Framework\Attributes\Group;
@@ -198,8 +197,6 @@ class SecondLevelCacheRepositoryTest extends SecondLevelCacheFunctionalTestCase
         self::assertInstanceOf(State::class, $entities[1]);
         self::assertInstanceOf(Country::class, $entities[0]->getCountry());
         self::assertInstanceOf(Country::class, $entities[0]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[0]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[1]->getCountry());
 
         // load from cache
         $this->getQueryLog()->reset()->enable();
@@ -212,8 +209,6 @@ class SecondLevelCacheRepositoryTest extends SecondLevelCacheFunctionalTestCase
         self::assertInstanceOf(State::class, $entities[1]);
         self::assertInstanceOf(Country::class, $entities[0]->getCountry());
         self::assertInstanceOf(Country::class, $entities[1]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[0]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[1]->getCountry());
 
         // invalidate cache
         $this->_em->persist(new State('foo', $this->_em->find(Country::class, $this->countries[0]->getId())));
@@ -231,8 +226,6 @@ class SecondLevelCacheRepositoryTest extends SecondLevelCacheFunctionalTestCase
         self::assertInstanceOf(State::class, $entities[1]);
         self::assertInstanceOf(Country::class, $entities[0]->getCountry());
         self::assertInstanceOf(Country::class, $entities[1]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[0]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[1]->getCountry());
 
         // load from cache
         $this->getQueryLog()->reset()->enable();
@@ -245,7 +238,5 @@ class SecondLevelCacheRepositoryTest extends SecondLevelCacheFunctionalTestCase
         self::assertInstanceOf(State::class, $entities[1]);
         self::assertInstanceOf(Country::class, $entities[0]->getCountry());
         self::assertInstanceOf(Country::class, $entities[1]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[0]->getCountry());
-        self::assertInstanceOf(InternalProxy::class, $entities[1]->getCountry());
     }
 }

tests/Tests/ORM/Functional/Ticket/DDC1238Test.php

@@ -57,11 +57,11 @@ class DDC1238Test extends OrmFunctionalTestCase
 
         $user2 = $this->_em->getReference(DDC1238User::class, $userId);
 
-        //$user->__load();
+        //$this->initializeObject($user);
 
         self::assertIsInt($user->getId(), 'Even if a proxy is detached, it should still have an identifier');
 
-        $user2->__load();
+        $this->initializeObject($user2);
 
         self::assertIsInt($user2->getId(), 'The managed instance still has an identifier');
     }

tests/Tests/ORM/Functional/Ticket/DDC168Test.php

@@ -25,7 +25,7 @@ class DDC168Test extends OrmFunctionalTestCase
         $this->oldMetadata = $this->_em->getClassMetadata(CompanyEmployee::class);
 
         $metadata = clone $this->oldMetadata;
-        ksort($metadata->reflFields);
+        ksort($metadata->propertyAccessors);
         $this->_em->getMetadataFactory()->setMetadataFor(CompanyEmployee::class, $metadata);
     }
 

tests/Tests/ORM/Functional/Ticket/GH10808Test.php

@@ -32,6 +32,10 @@ class GH10808Test extends OrmFunctionalTestCase
 
     public function testDQLDeferredEagerLoad(): void
     {
+        if ($this->_em->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            self::markTestSkipped('Test requires lazy loading to be disabled');
+        }
+
         $appointment = new GH10808Appointment();
 
         $this->_em->persist($appointment);

tests/Tests/ORM/Functional/ValueObjectsTest.php

@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace Doctrine\Tests\ORM\Functional;
 
 use DateTime;
-use Doctrine\Common\Reflection\RuntimePublicReflectionProperty as CommonRuntimePublicReflectionProperty;
 use Doctrine\ORM\Mapping\Column;
 use Doctrine\ORM\Mapping\DiscriminatorColumn;
 use Doctrine\ORM\Mapping\DiscriminatorMap;
@@ -17,15 +16,11 @@ use Doctrine\ORM\Mapping\Id;
 use Doctrine\ORM\Mapping\InheritanceType;
 use Doctrine\ORM\Mapping\MappedSuperclass;
 use Doctrine\ORM\Mapping\MappingException;
-use Doctrine\ORM\Mapping\ReflectionEmbeddedProperty;
 use Doctrine\ORM\Query\QueryException;
-use Doctrine\Persistence\Reflection\RuntimeReflectionProperty;
 use Doctrine\Tests\OrmFunctionalTestCase;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\Attributes\Group;
-use ReflectionProperty;
 
-use function class_exists;
 use function sprintf;
 
 #[Group('DDC-93')]
@@ -45,30 +40,6 @@ class ValueObjectsTest extends OrmFunctionalTestCase
         );
     }
 
-    public function testMetadataHasReflectionEmbeddablesAccessible(): void
-    {
-        $classMetadata = $this->_em->getClassMetadata(DDC93Person::class);
-
-        if (class_exists(CommonRuntimePublicReflectionProperty::class)) {
-            self::assertInstanceOf(
-                CommonRuntimePublicReflectionProperty::class,
-                $classMetadata->getReflectionProperty('address'),
-            );
-        } elseif (class_exists(RuntimeReflectionProperty::class)) {
-            self::assertInstanceOf(
-                RuntimeReflectionProperty::class,
-                $classMetadata->getReflectionProperty('address'),
-            );
-        } else {
-            self::assertInstanceOf(
-                ReflectionProperty::class,
-                $classMetadata->getReflectionProperty('address'),
-            );
-        }
-
-        self::assertInstanceOf(ReflectionEmbeddedProperty::class, $classMetadata->getReflectionProperty('address.street'));
-    }
-
     public function testCRUD(): void
     {
         $person                   = new DDC93Person();

tests/Tests/ORM/Hydration/ObjectHydratorTest.php

@@ -9,7 +9,6 @@ use Doctrine\ORM\Internal\Hydration\HydrationException;
 use Doctrine\ORM\Internal\Hydration\ObjectHydrator;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\PersistentCollection;
-use Doctrine\ORM\Proxy\InternalProxy;
 use Doctrine\ORM\Proxy\ProxyFactory;
 use Doctrine\ORM\Query\ResultSetMapping;
 use Doctrine\Tests\Mocks\ArrayResultFactory;
@@ -1030,7 +1029,7 @@ class ObjectHydratorTest extends HydrationTestCase
             'Proxies',
             ProxyFactory::AUTOGENERATE_ALWAYS,
         ) extends ProxyFactory {
-            public function getProxy(string $className, array $identifier): InternalProxy
+            public function getProxy(string $className, array $identifier): object
             {
                 TestCase::assertSame(ECommerceShipping::class, $className);
                 TestCase::assertSame(['id' => 42], $identifier);
@@ -1084,7 +1083,7 @@ class ObjectHydratorTest extends HydrationTestCase
             'Proxies',
             ProxyFactory::AUTOGENERATE_ALWAYS,
         ) extends ProxyFactory {
-            public function getProxy(string $className, array $identifier): InternalProxy
+            public function getProxy(string $className, array $identifier): object
             {
                 TestCase::assertSame(ECommerceShipping::class, $className);
                 TestCase::assertSame(['id' => 42], $identifier);

tests/Tests/ORM/Mapping/BasicInheritanceMappingTest.php

@@ -119,9 +119,9 @@ class BasicInheritanceMappingTest extends OrmTestCase
         $class2 = unserialize(serialize($class));
         $class2->wakeupReflection(new RuntimeReflectionService());
 
-        self::assertArrayHasKey('mapped1', $class2->reflFields);
-        self::assertArrayHasKey('mapped2', $class2->reflFields);
-        self::assertArrayHasKey('mappedRelated1', $class2->reflFields);
+        self::assertArrayHasKey('mapped1', $class2->propertyAccessors);
+        self::assertArrayHasKey('mapped2', $class2->propertyAccessors);
+        self::assertArrayHasKey('mappedRelated1', $class2->propertyAccessors);
     }
 
     #[Group('DDC-1203')]

tests/Tests/ORM/Mapping/ClassMetadataLoadEventTest.php

@@ -10,10 +10,10 @@ use Doctrine\ORM\Mapping\Column;
 use Doctrine\ORM\Mapping\Entity;
 use Doctrine\ORM\Mapping\GeneratedValue;
 use Doctrine\ORM\Mapping\Id;
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessor;
 use Doctrine\ORM\Mapping\Table;
 use Doctrine\Tests\OrmTestCase;
 use PHPUnit\Framework\Attributes\Group;
-use ReflectionProperty;
 
 class ClassMetadataLoadEventTest extends OrmTestCase
 {
@@ -26,8 +26,8 @@ class ClassMetadataLoadEventTest extends OrmTestCase
         $evm->addEventListener(Events::loadClassMetadata, $this);
         $classMetadata = $metadataFactory->getMetadataFor(LoadEventTestEntity::class);
         self::assertTrue($classMetadata->hasField('about'));
-        self::assertArrayHasKey('about', $classMetadata->reflFields);
-        self::assertInstanceOf(ReflectionProperty::class, $classMetadata->reflFields['about']);
+        self::assertArrayHasKey('about', $classMetadata->propertyAccessors);
+        self::assertInstanceOf(PropertyAccessor::class, $classMetadata->propertyAccessors['about']);
     }
 
     public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs): void

tests/Tests/ORM/Mapping/ClassMetadataTest.php

@@ -56,6 +56,7 @@ use PHPUnit\Framework\Attributes\WithoutErrorHandler;
 use ReflectionClass;
 use stdClass;
 
+use function array_keys;
 use function assert;
 use function class_exists;
 use function count;
@@ -80,7 +81,7 @@ class ClassMetadataTest extends OrmTestCase
         $cm->initializeReflection(new RuntimeReflectionService());
 
         // Test initial state
-        self::assertTrue(count($cm->getReflectionProperties()) === 0);
+        self::assertTrue(count($cm->getPropertyAccessors()) === 0);
         self::assertInstanceOf(ReflectionClass::class, $cm->reflClass);
         self::assertEquals(CmsUser::class, $cm->name);
         self::assertEquals(CmsUser::class, $cm->rootEntityName);
@@ -106,7 +107,7 @@ class ClassMetadataTest extends OrmTestCase
         $cm->wakeupReflection(new RuntimeReflectionService());
 
         // Check state
-        self::assertTrue(count($cm->getReflectionProperties()) > 0);
+        self::assertTrue(count($cm->getPropertyAccessors()) > 0);
         self::assertEquals('Doctrine\Tests\Models\CMS', $cm->namespace);
         self::assertInstanceOf(ReflectionClass::class, $cm->reflClass);
         self::assertEquals(CmsUser::class, $cm->name);
@@ -989,7 +990,7 @@ class ClassMetadataTest extends OrmTestCase
         self::assertInstanceOf(MyArrayObjectEntity::class, $classMetadata->newInstance());
     }
 
-    public function testWakeupReflectionWithEmbeddableAndStaticReflectionService(): void
+    public function testWakeupReflectionWithEmbeddable(): void
     {
         if (! class_exists(StaticReflectionService::class)) {
             self::markTestSkipped('This test is not supported by the current installed doctrine/persistence version');
@@ -999,7 +1000,7 @@ class ClassMetadataTest extends OrmTestCase
 
         $classMetadata->mapEmbedded(
             [
-                'fieldName'    => 'test',
+                'fieldName'    => 'embedded',
                 'class'        => TestEntity1::class,
                 'columnPrefix' => false,
             ],
@@ -1009,14 +1010,14 @@ class ClassMetadataTest extends OrmTestCase
             'fieldName' => 'test.embeddedProperty',
             'type' => 'string',
             'originalClass' => TestEntity1::class,
-            'declaredField' => 'test',
-            'originalField' => 'embeddedProperty',
+            'declaredField' => 'embedded',
+            'originalField' => 'name',
         ];
 
         $classMetadata->mapField($field);
         $classMetadata->wakeupReflection(new StaticReflectionService());
 
-        self::assertEquals(['test' => null, 'test.embeddedProperty' => null], $classMetadata->getReflectionProperties());
+        self::assertEquals(['embedded', 'test.embeddedProperty'], array_keys($classMetadata->getPropertyAccessors()));
     }
 
     public function testGetColumnNamesWithGivenFieldNames(): void

tests/Tests/ORM/Mapping/JoinColumnMappingTest.php

@@ -17,6 +17,7 @@ final class JoinColumnMappingTest extends TestCase
     {
         $mapping = new JoinColumnMapping('foo', 'id');
 
+        $mapping->deferrable           = true;
         $mapping->unique               = true;
         $mapping->quoted               = true;
         $mapping->fieldName            = 'bar';
@@ -29,6 +30,7 @@ final class JoinColumnMappingTest extends TestCase
         $resurrectedMapping = unserialize(serialize($mapping));
         assert($resurrectedMapping instanceof JoinColumnMapping);
 
+        self::assertTrue($resurrectedMapping->deferrable);
         self::assertSame('foo', $resurrectedMapping->name);
         self::assertTrue($resurrectedMapping->unique);
         self::assertTrue($resurrectedMapping->quoted);

tests/Tests/ORM/Mapping/MappingDriverTestCase.php

@@ -62,6 +62,7 @@ use Doctrine\Tests\Models\TypedProperties\UserTyped;
 use Doctrine\Tests\Models\TypedProperties\UserTypedWithCustomTypedField;
 use Doctrine\Tests\Models\Upsertable\Insertable;
 use Doctrine\Tests\Models\Upsertable\Updatable;
+use Doctrine\Tests\ORM\Mapping\NamingStrategy\CustomPascalNamingStrategy;
 use Doctrine\Tests\OrmTestCase;
 use PHPUnit\Framework\Attributes\Depends;
 use stdClass;
@@ -946,6 +947,16 @@ abstract class MappingDriverTestCase extends OrmTestCase
 
         self::assertEquals(Suit::class, $metadata->fieldMappings['suit']->enumType);
     }
+
+    public function testCustomNamingStrategyIsRespected(): void
+    {
+        $ns       = new CustomPascalNamingStrategy();
+        $metadata = $this->createClassMetadata(BlogPostComment::class, $ns);
+
+        self::assertEquals('id', $metadata->fieldNames['Id']);
+        self::assertEquals('Id', $metadata->associationMappings['blogPost']->joinColumns[0]->referencedColumnName);
+        self::assertFalse($metadata->associationMappings['blogPost']->joinColumns[0]->nullable);
+    }
 }
 
 #[ORM\Entity()]
@@ -1547,3 +1558,51 @@ abstract class GH10288EnumTypePerson
 class GH10288EnumTypeBoss extends GH10288EnumTypePerson
 {
 }
+
+/**
+ * Two small related entities to test default namings with barebone attributes
+ */
+#[Entity]
+class BlogPost
+{
+    #[Id]
+    #[Column]
+    #[GeneratedValue(strategy: 'NONE')]
+    public int $id;
+}
+
+#[Entity]
+class BlogPostComment
+{
+    #[Id]
+    #[Column]
+    #[GeneratedValue(strategy: 'AUTO')]
+    public int $id;
+
+    #[ORM\ManyToOne]
+    #[ORM\JoinColumn(nullable: false)]
+    public BlogPost $blogPost;
+
+    public static function loadMetadata(ClassMetadata $metadata): void
+    {
+        $metadata->mapField(
+            [
+                'id'                => true,
+                'fieldName'         => 'id',
+                'type'              => 'integer',
+            ],
+        );
+        $metadata->setIdGeneratorType(ClassMetadata::GENERATOR_TYPE_AUTO);
+
+        $metadata->mapManyToOne(
+            [
+                'fieldName' => 'blogPost',
+                'targetEntity' => BlogPost::class,
+                'joinColumns' =>
+                    [
+                        0 => ['nullable' => false],
+                    ],
+            ],
+        );
+    }
+}

tests/Tests/ORM/Mapping/NamingStrategy/CustomPascalNamingStrategy.php

@@ -0,0 +1,110 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\NamingStrategy;
+
+use Doctrine\ORM\Mapping\NamingStrategy;
+use LogicException;
+
+use function sprintf;
+use function str_contains;
+use function strrpos;
+use function strtolower;
+use function substr;
+use function ucfirst;
+
+/**
+ * Fully customized naming strategy changing all namings to a PascalCase model. Included to test some behaviours
+ * regarding fully custom naming strategies.
+ */
+class CustomPascalNamingStrategy implements NamingStrategy
+{
+    /**
+     * Returns a table name for an entity class.
+     *
+     * @param string $className The fully-qualified class name
+     *
+     * @return string A table name
+     */
+    public function classToTableName(string $className): string
+    {
+        if (str_contains($className, '\\')) {
+            return substr($className, strrpos($className, '\\') + 1);
+        }
+
+        return $className;
+    }
+
+    /**
+     * Returns a column name for a property.
+     *
+     * @param string      $propertyName A property name
+     * @param string|null $className    The fully-qualified class name
+     *
+     * @return string A column name
+     */
+    public function propertyToColumnName(string $propertyName, string|null $className = null): string
+    {
+        if ($className !== null && strtolower($propertyName) === strtolower($this->classToTableName($className)) . 'id') {
+            return 'Id';
+        }
+
+        return ucfirst($propertyName);
+    }
+
+    /**
+     * Returns a column name for an embedded property.
+     */
+    public function embeddedFieldToColumnName(string $propertyName, string $embeddedColumnName, string|null $className = null, $embeddedClassName = null): string
+    {
+        throw new LogicException(sprintf('Method %s is not implemented', __METHOD__));
+    }
+
+    /**
+     * Returns the default reference column name.
+     *
+     * @return string A column name
+     */
+    public function referenceColumnName(): string
+    {
+        return 'Id';
+    }
+
+    /**
+     * Returns a join column name for a property.
+     *
+     * @return string A join column name
+     */
+    public function joinColumnName(string $propertyName, string $className): string
+    {
+        return ucfirst($propertyName) . $this->referenceColumnName();
+    }
+
+    /**
+     * Returns a join table name.
+     *
+     * @param string      $sourceEntity The source entity
+     * @param string      $targetEntity The target entity
+     * @param string|null $propertyName A property name
+     *
+     * @return string A join table name
+     */
+    public function joinTableName(string $sourceEntity, string $targetEntity, string|null $propertyName = null): string
+    {
+        return $this->classToTableName($sourceEntity) . $this->classToTableName($targetEntity);
+    }
+
+    /**
+     * Returns the foreign key column name for the given parameters.
+     *
+     * @param string      $entityName           An entity
+     * @param string|null $referencedColumnName A property
+     *
+     * @return string A join column name
+     */
+    public function joinKeyColumnName(string $entityName, string|null $referencedColumnName = null): string
+    {
+        return $this->classToTableName($entityName) . ($referencedColumnName ?: $this->referenceColumnName());
+    }
+}

tests/Tests/ORM/Mapping/NamingStrategyTest.php

@@ -7,6 +7,7 @@ namespace Doctrine\Tests\ORM\Mapping;
 use Doctrine\ORM\Mapping\DefaultNamingStrategy;
 use Doctrine\ORM\Mapping\NamingStrategy;
 use Doctrine\ORM\Mapping\UnderscoreNamingStrategy;
+use Doctrine\Tests\ORM\Mapping\NamingStrategy\CustomPascalNamingStrategy;
 use Doctrine\Tests\ORM\Mapping\NamingStrategy\JoinColumnClassNamingStrategy;
 use Doctrine\Tests\OrmTestCase;
 use PHPUnit\Framework\Attributes\DataProvider;
@@ -33,6 +34,11 @@ class NamingStrategyTest extends OrmTestCase
         return new UnderscoreNamingStrategy(CASE_UPPER);
     }
 
+    private static function customNaming(): CustomPascalNamingStrategy
+    {
+        return new CustomPascalNamingStrategy();
+    }
+
     /**
      * Data Provider for NamingStrategy#classToTableName
      *
@@ -56,6 +62,10 @@ class NamingStrategyTest extends OrmTestCase
             [self::underscoreNamingUpper(), 'NAME', '\Some\Class\Name'],
             [self::underscoreNamingUpper(), 'NAME2_TEST', '\Some\Class\Name2Test'],
             [self::underscoreNamingUpper(), 'NAME2TEST', '\Some\Class\Name2test'],
+
+            // CustomPascalNamingStrategy
+            [self::customNaming(), 'SomeClassName', 'SomeClassName'],
+            [self::customNaming(), 'Name2Test', '\Some\Class\Name2Test'],
         ];
     }
 
@@ -89,6 +99,10 @@ class NamingStrategyTest extends OrmTestCase
             [self::underscoreNamingUpper(), 'SOME_PROPERTY', 'SOME_PROPERTY', 'Some\Class'],
             [self::underscoreNamingUpper(), 'BASE64_ENCODED', 'base64Encoded', 'Some\Class'],
             [self::underscoreNamingUpper(), 'BASE64ENCODED', 'base64encoded', 'Some\Class'],
+
+            // CustomPascalNamingStrategy
+            [self::customNaming(), 'SomeProperty', 'someProperty', 'Some\Class'],
+            [self::customNaming(), 'Base64Encoded', 'base64Encoded', 'Some\Class'],
         ];
     }
 
@@ -116,6 +130,9 @@ class NamingStrategyTest extends OrmTestCase
             // UnderscoreNamingStrategy
             [self::underscoreNamingLower(), 'id'],
             [self::underscoreNamingUpper(), 'ID'],
+
+            // CustomPascalNamingStrategy
+            [self::customNaming(), 'Id'],
         ];
     }
 

tests/Tests/ORM/Mapping/PropertyAccessors/EnumPropertyAccessorTest.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Mapping\PropertyAccessors\EnumPropertyAccessor;
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessorFactory;
+use Doctrine\Tests\OrmTestCase;
+
+class EnumPropertyAccessorTest extends OrmTestCase
+{
+    public function testEnumSetEnumGetValue(): void
+    {
+        $object   = new EnumClass();
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(EnumClass::class, 'enum');
+
+        $accessor = new EnumPropertyAccessor($accessor, EnumType::class);
+
+        $accessor->setValue($object, EnumType::A);
+
+        $this->assertEquals($object->enum, EnumType::A);
+        $this->assertEquals(EnumType::A->value, $accessor->getValue($object));
+    }
+
+    public function testEnumSetDatabaseGetValue(): void
+    {
+        $object   = new EnumClass();
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(EnumClass::class, 'enum');
+
+        $accessor = new EnumPropertyAccessor($accessor, EnumType::class);
+
+        $accessor->setValue($object, EnumType::A->value);
+
+        $this->assertEquals($object->enum, EnumType::A);
+        $this->assertEquals(EnumType::A->value, $accessor->getValue($object));
+    }
+
+    public function testEnumSetDatabaseArrayGetValue(): void
+    {
+        $object   = new EnumClass();
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(EnumClass::class, 'enumList');
+
+        $accessor = new EnumPropertyAccessor($accessor, EnumType::class);
+
+        $accessor->setValue($object, $values = [EnumType::A->value, EnumType::B->value, EnumType::C->value]);
+
+        $this->assertEquals($object->enumList, [EnumType::A, EnumType::B, EnumType::C]);
+        $this->assertEquals($values, $accessor->getValue($object));
+    }
+}
+
+class EnumClass
+{
+    public EnumType $enum;
+    public array $enumList;
+}
+
+enum EnumType: string
+{
+    case A = 'a';
+    case B = 'b';
+    case C = 'c';
+}

tests/Tests/ORM/Mapping/PropertyAccessors/ObjectCastPropertyAccessorTest.php

@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Mapping\PropertyAccessors\ObjectCastPropertyAccessor;
+use Doctrine\ORM\Proxy\InternalProxy;
+use Doctrine\Tests\OrmTestCase;
+
+class ObjectCastPropertyAccessorTest extends OrmTestCase
+{
+    public function testSetGetPublicPropertyValue(): void
+    {
+        $object   = new ObjectClass();
+        $accessor = ObjectCastPropertyAccessor::fromNames(ObjectClass::class, 'property');
+
+        $accessor->setValue($object, 'value');
+
+        $this->assertEquals($object->property, 'value');
+        $this->assertEquals('value', $accessor->getValue($object));
+    }
+
+    public function testSetGetPrivatePropertyValue(): void
+    {
+        $object   = new ObjectClass();
+        $accessor = ObjectCastPropertyAccessor::fromNames(ObjectClass::class, 'property2');
+
+        $accessor->setValue($object, 'value');
+
+        $this->assertEquals($object->getProperty2(), 'value');
+        $this->assertEquals('value', $accessor->getValue($object));
+    }
+
+    public function testSetGetInternalProxyValue(): void
+    {
+        $object   = new ObjectClassInternalProxy();
+        $accessor = ObjectCastPropertyAccessor::fromNames(ObjectClassInternalProxy::class, 'property');
+
+        $accessor->setValue($object, 'value');
+
+        $this->assertEquals($object->property, 'value');
+        $this->assertEquals('value', $accessor->getValue($object));
+        $this->assertFalse($object->isInitialized);
+        $this->assertEquals(2, $object->counter);
+    }
+}
+
+class ObjectClass
+{
+    /** @var string */
+    public $property;
+    /** @var string */
+    private $property2;
+
+    public function getProperty2(): string
+    {
+        return $this->property2;
+    }
+}
+
+class ObjectClassInternalProxy implements InternalProxy
+{
+    /** @var string */
+    public $property;
+    public bool $isInitialized = false;
+    public int $counter        = 0;
+
+    public function __setInitialized(bool $initialized): void
+    {
+        $this->isInitialized = $initialized;
+        $this->counter++;
+    }
+
+    public function __load(): void
+    {
+    }
+
+    /** Returns whether this proxy is initialized or not. */
+    public function __isInitialized(): bool
+    {
+        return $this->isInitialized;
+    }
+}

tests/Tests/ORM/Mapping/PropertyAccessors/RawValuePropertyAccessorTest.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Mapping\PropertyAccessors\RawValuePropertyAccessor;
+use Doctrine\Tests\Models\PropertyHooks\User;
+use Doctrine\Tests\OrmTestCase;
+use PHPUnit\Framework\Attributes\RequiresPhp;
+use ReflectionObject;
+
+use function trim;
+
+#[RequiresPhp(versionRequirement: '>= 8.4.0')]
+class RawValuePropertyAccessorTest extends OrmTestCase
+{
+    public function testSetGetValue(): void
+    {
+        $object        = new User();
+        $reflection    = new ReflectionObject($object);
+        $accessorFirst = RawValuePropertyAccessor::fromReflectionProperty($reflection->getProperty('first'));
+        $accessorLast  = RawValuePropertyAccessor::fromReflectionProperty($reflection->getProperty('last'));
+
+        $accessorFirst->setValue($object, 'Benjamin');
+        $accessorLast->setValue($object, 'Eberlei');
+
+        self::assertEquals('Benjamin Eberlei', $object->fullName);
+        self::assertEquals('Benjamin', $accessorFirst->getValue($object));
+        self::assertEquals('Eberlei', $accessorLast->getValue($object));
+
+        $accessorFirst->setValue($object, '');
+        $accessorLast->setValue($object, '');
+
+        self::assertEquals('', trim($object->fullName));
+    }
+
+    public function testSetGetValueWithLanguage(): void
+    {
+        $object     = new User();
+        $reflection = new ReflectionObject($object);
+        $accessor   = RawValuePropertyAccessor::fromReflectionProperty($reflection->getProperty('language'));
+
+        $accessor->setValue($object, 'en');
+
+        self::assertEquals('EN', $object->language);
+        self::assertEquals('en', $accessor->getValue($object));
+
+        $accessor->setValue($object, 'EN');
+
+        self::assertEquals('EN', $object->language);
+        self::assertEquals('EN', $accessor->getValue($object));
+    }
+}

tests/Tests/ORM/Mapping/PropertyAccessors/ReadOnlyAccessorTest.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessorFactory;
+use Doctrine\ORM\Mapping\PropertyAccessors\ReadonlyAccessor;
+use Doctrine\Tests\OrmTestCase;
+use LogicException;
+
+class ReadOnlyAccessorTest extends OrmTestCase
+{
+    public function testReadOnlyProperty(): void
+    {
+        $object   = new ReadOnlyClass();
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(ReadOnlyClass::class, 'property');
+
+        $this->assertInstanceOf(ReadonlyAccessor::class, $accessor);
+
+        $accessor->setValue($object, 1);
+
+        $this->assertEquals($object->property, 1);
+        $this->assertEquals(1, $accessor->getValue($object));
+    }
+
+    public function testReadOnlyPropertyOnlyOnce(): void
+    {
+        $object   = new ReadOnlyClass();
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(ReadOnlyClass::class, 'property');
+
+        $this->assertInstanceOf(ReadonlyAccessor::class, $accessor);
+
+        $accessor->setValue($object, 1);
+        $this->expectException(LogicException::class);
+        $accessor->setValue($object, 2);
+    }
+}
+
+class ReadOnlyClass
+{
+    public readonly int $property;
+}

tests/Tests/ORM/Mapping/PropertyAccessors/TypedNoDefaultPropertyAccessorTest.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Mapping\PropertyAccessors;
+
+use Doctrine\ORM\Mapping\PropertyAccessors\PropertyAccessorFactory;
+use Doctrine\ORM\Mapping\PropertyAccessors\TypedNoDefaultPropertyAccessor;
+use Doctrine\Tests\OrmTestCase;
+
+class TypedNoDefaultPropertyAccessorTest extends OrmTestCase
+{
+    public function testSetValueWithoutDefault(): void
+    {
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(TypedClass::class, 'property');
+
+        $this->assertInstanceOf(TypedNoDefaultPropertyAccessor::class, $accessor);
+
+        $object = new TypedClass();
+        $accessor->setValue($object, 42);
+        $this->assertEquals(42, $accessor->getValue($object));
+    }
+
+    public function testSetNullWithoutDefault(): void
+    {
+        $accessor = PropertyAccessorFactory::createPropertyAccessor(TypedClass::class, 'property');
+
+        $object = new TypedClass();
+        $accessor->setValue($object, null);
+        $this->assertNull($accessor->getValue($object));
+
+        $accessor->setValue($object, 42);
+        $this->assertEquals(42, $accessor->getValue($object));
+
+        $accessor->setValue($object, null);
+        $this->assertNull($accessor->getValue($object));
+    }
+}
+
+class TypedClass
+{
+    public int $property;
+}

tests/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.BlogPost.dcm.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+
+    <entity name="Doctrine\Tests\ORM\Mapping\BlogPost">
+
+        <id name="id" type="integer" column="id">
+            <generator strategy="NONE"/>
+        </id>
+
+    </entity>
+
+</doctrine-mapping>

tests/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.BlogPostComment.dcm.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                  xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                          https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+
+    <entity name="Doctrine\Tests\ORM\Mapping\BlogPostComment">
+
+        <id name="id" type="integer">
+            <generator strategy="NONE"/>
+        </id>
+
+        <many-to-one field="blogPost" target-entity="Doctrine\Tests\ORM\Mapping\BlogPost">
+            <join-columns>
+                <join-column nullable="false"/>
+            </join-columns>
+        </many-to-one>
+
+    </entity>
+
+</doctrine-mapping>

tests/Tests/ORM/Proxy/ProxyFactoryTest.php

@@ -20,6 +20,8 @@ use Doctrine\Tests\Models\Company\CompanyPerson;
 use Doctrine\Tests\Models\ECommerce\ECommerceFeature;
 use Doctrine\Tests\OrmTestCase;
 use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\Attributes\RequiresPhp;
+use ReflectionClass;
 use ReflectionProperty;
 use stdClass;
 
@@ -127,7 +129,6 @@ class ProxyFactoryTest extends OrmTestCase
         $this->uowMock->setEntityPersister(ECommerceFeature::class, $persister);
 
         $proxy = $this->proxyFactory->getProxy(ECommerceFeature::class, ['id' => 42]);
-        assert($proxy instanceof Proxy);
 
         $persister
             ->expects(self::atLeastOnce())
@@ -140,7 +141,19 @@ class ProxyFactoryTest extends OrmTestCase
         } catch (EntityNotFoundException) {
         }
 
-        self::assertFalse($proxy->__isInitialized());
+        self::assertUninitializedLazyObject($proxy);
+    }
+
+    private static function assertUninitializedLazyObject(object $proxy): void
+    {
+        if ($proxy instanceof Proxy) {
+            self::assertFalse($proxy->__isInitialized());
+
+            return;
+        }
+
+        $reflectionClass = new ReflectionClass($proxy);
+        self::assertTrue($reflectionClass->isUninitializedLazyObject($proxy));
     }
 
     #[Group('DDC-2432')]
@@ -153,7 +166,6 @@ class ProxyFactoryTest extends OrmTestCase
         $this->uowMock->setEntityPersister(ECommerceFeature::class, $persister);
 
         $proxy = $this->proxyFactory->getProxy(ECommerceFeature::class, ['id' => 42]);
-        assert($proxy instanceof Proxy);
 
         $persister
             ->expects(self::atLeastOnce())
@@ -167,11 +179,15 @@ class ProxyFactoryTest extends OrmTestCase
         } catch (EntityNotFoundException) {
         }
 
-        self::assertFalse($proxy->__isInitialized());
+        self::assertUninitializedLazyObject($proxy);
     }
 
     public function testProxyClonesParentFields(): void
     {
+        if ($this->emMock->getConfiguration()->isNativeLazyObjectsEnabled()) {
+            self::markTestSkipped('This test is not relevant when native lazy objects are enabled');
+        }
+
         $companyEmployee = new CompanyEmployee();
         $companyEmployee->setSalary(1000); // A property on the CompanyEmployee
         $companyEmployee->setName('Bob'); // A property on the parent class, CompanyPerson
@@ -209,6 +225,24 @@ class ProxyFactoryTest extends OrmTestCase
         self::assertSame(1000, $cloned->getSalary(), 'Expect properties on the CompanyEmployee class to be cloned');
         self::assertSame('Bob', $cloned->getName(), 'Expect properties on the CompanyPerson class to be cloned');
     }
+
+    #[RequiresPhp('8.4')]
+    public function testProxyFactoryAcceptsNullProxyArgsWhenNativeLazyObjectsAreEnabled(): void
+    {
+        $this->emMock->getConfiguration()->enableNativeLazyObjects(true);
+        $this->proxyFactory = new ProxyFactory(
+            $this->emMock,
+            null,
+            null,
+        );
+        $proxy              = $this->proxyFactory->getProxy(
+            ECommerceFeature::class,
+            ['id' => 42],
+        );
+        $reflection         = new ReflectionClass($proxy);
+
+        self::assertTrue($reflection->isUninitializedLazyObject($proxy));
+    }
 }
 
 abstract class AbstractClass

tests/Tests/ORM/QueryBuilderTest.php

@@ -15,6 +15,7 @@ use Doctrine\ORM\Query\Expr\Join;
 use Doctrine\ORM\Query\Parameter;
 use Doctrine\ORM\Query\ParameterTypeInferer;
 use Doctrine\ORM\QueryBuilder;
+use Doctrine\ORM\QueryType;
 use Doctrine\Tests\Mocks\EntityManagerMock;
 use Doctrine\Tests\Models\Cache\State;
 use Doctrine\Tests\Models\CMS\CmsArticle;
@@ -23,6 +24,7 @@ use Doctrine\Tests\Models\CMS\CmsUser;
 use Doctrine\Tests\OrmTestCase;
 use InvalidArgumentException;
 use PHPUnit\Framework\Attributes\Group;
+use PHPUnit\Framework\TestCase;
 
 use function array_filter;
 use function class_exists;
@@ -1326,4 +1328,25 @@ class QueryBuilderTest extends OrmTestCase
         self::assertEquals(100, $qb->getParameter('dcValue1')->getValue());
         self::assertEquals(Types::INTEGER, $qb->getParameter('dcValue1')->getType());
     }
+
+    public function testType(): void
+    {
+        $qb = new class ($this->entityManager) extends QueryBuilder {
+            public function test(): void
+            {
+                TestCase::assertSame(QueryType::Select, $this->getType());
+
+                $this->delete();
+                TestCase::assertSame(QueryType::Delete, $this->getType());
+
+                $this->update();
+                TestCase::assertSame(QueryType::Update, $this->getType());
+
+                $this->select();
+                TestCase::assertSame(QueryType::Select, $this->getType());
+            }
+        };
+
+        $qb->test();
+    }
 }

tests/Tests/ORM/Tools/Console/Command/ClearCacheCollectionRegionCommandTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\ClearCache\CollectionRegionCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\Models\Cache\State;
@@ -15,6 +16,8 @@ use Symfony\Component\Console\Tester\CommandTester;
 #[Group('DDC-2183')]
 class ClearCacheCollectionRegionCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
 
     private CollectionRegionCommand $command;
@@ -28,7 +31,7 @@ class ClearCacheCollectionRegionCommandTest extends OrmFunctionalTestCase
         $this->command = new CollectionRegionCommand(new SingleManagerProvider($this->_em));
 
         $this->application = new Application();
-        $this->application->add($this->command);
+        self::addCommandToApplication($this->application, $this->command);
     }
 
     public function testClearAllRegion(): void

tests/Tests/ORM/Tools/Console/Command/ClearCacheEntityRegionCommandTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\ClearCache\EntityRegionCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\Models\Cache\Country;
@@ -18,6 +19,8 @@ use function trim;
 #[Group('DDC-2183')]
 class ClearCacheEntityRegionCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
 
     private EntityRegionCommand $command;
@@ -31,7 +34,7 @@ class ClearCacheEntityRegionCommandTest extends OrmFunctionalTestCase
         $this->command = new EntityRegionCommand(new SingleManagerProvider($this->_em));
 
         $this->application = new Application();
-        $this->application->add($this->command);
+        self::addCommandToApplication($this->application, $this->command);
     }
 
     public function testClearAllRegion(): void

tests/Tests/ORM/Tools/Console/Command/ClearCacheQueryRegionCommandTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\ClearCache\QueryRegionCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\OrmFunctionalTestCase;
@@ -14,6 +15,8 @@ use Symfony\Component\Console\Tester\CommandTester;
 #[Group('DDC-2183')]
 class ClearCacheQueryRegionCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
 
     private QueryRegionCommand $command;
@@ -27,7 +30,7 @@ class ClearCacheQueryRegionCommandTest extends OrmFunctionalTestCase
         $this->command = new QueryRegionCommand(new SingleManagerProvider($this->_em));
 
         $this->application = new Application();
-        $this->application->add($this->command);
+        self::addCommandToApplication($this->application, $this->command);
     }
 
     public function testClearAllRegion(): void

tests/Tests/ORM/Tools/Console/Command/InfoCommandTest.php

@@ -7,6 +7,7 @@ namespace Doctrine\Tests\ORM\Tools\Console\Command;
 use Doctrine\ORM\Configuration;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Mapping\MappingException;
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\InfoCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Persistence\Mapping\Driver\MappingDriver;
@@ -18,6 +19,8 @@ use Symfony\Component\Console\Tester\CommandTester;
 
 class InfoCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
     private InfoCommand $command;
     private CommandTester $tester;
@@ -28,7 +31,7 @@ class InfoCommandTest extends OrmFunctionalTestCase
 
         $this->application = new Application();
 
-        $this->application->add(new InfoCommand(new SingleManagerProvider($this->_em)));
+        self::addCommandToApplication($this->application, new InfoCommand(new SingleManagerProvider($this->_em)));
 
         $this->command = $this->application->find('orm:info');
         $this->tester  = new CommandTester($this->command);
@@ -58,7 +61,7 @@ class InfoCommandTest extends OrmFunctionalTestCase
            ->willReturn($configuration);
 
         $application = new Application();
-        $application->add(new InfoCommand(new SingleManagerProvider($em)));
+        self::addCommandToApplication($application, new InfoCommand(new SingleManagerProvider($em)));
 
         $command = $application->find('orm:info');
         $tester  = new CommandTester($command);
@@ -96,7 +99,7 @@ class InfoCommandTest extends OrmFunctionalTestCase
            ->willThrowException(new MappingException('exception message'));
 
         $application = new Application();
-        $application->add(new InfoCommand(new SingleManagerProvider($em)));
+        self::addCommandToApplication($application, new InfoCommand(new SingleManagerProvider($em)));
 
         $command = $application->find('orm:info');
         $tester  = new CommandTester($command);

tests/Tests/ORM/Tools/Console/Command/MappingDescribeCommandTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\MappingDescribeCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\Models\Cache\AttractionInfo;
@@ -19,6 +20,8 @@ use Symfony\Component\Console\Tester\CommandTester;
 #[CoversClass(MappingDescribeCommand::class)]
 class MappingDescribeCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
 
     private MappingDescribeCommand $command;
@@ -30,7 +33,7 @@ class MappingDescribeCommandTest extends OrmFunctionalTestCase
         parent::setUp();
 
         $this->application = new Application();
-        $this->application->add(new MappingDescribeCommand(new SingleManagerProvider($this->_em)));
+        self::addCommandToApplication($this->application, new MappingDescribeCommand(new SingleManagerProvider($this->_em)));
 
         $this->command = $this->application->find('orm:mapping:describe');
         $this->tester  = new CommandTester($this->command);

tests/Tests/ORM/Tools/Console/Command/RunDqlCommandTest.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\RunDqlCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\Models\Generic\DateTimeModel;
@@ -20,6 +21,8 @@ use function trim;
 #[CoversClass(RunDqlCommand::class)]
 class RunDqlCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private Application $application;
 
     private RunDqlCommand $command;
@@ -35,7 +38,7 @@ class RunDqlCommandTest extends OrmFunctionalTestCase
         $this->command = new RunDqlCommand(new SingleManagerProvider($this->_em));
 
         $this->application = new Application();
-        $this->application->add($this->command);
+        self::addCommandToApplication($this->application, $this->command);
 
         $this->tester = new CommandTester($this->command);
     }

tests/Tests/ORM/Tools/Console/Command/ValidateSchemaCommandTest.php

@@ -6,6 +6,7 @@ namespace Doctrine\Tests\ORM\Tools\Console\Command;
 
 use Doctrine\DBAL\Platforms\SQLitePlatform;
 use Doctrine\DBAL\Schema\SchemaDiff;
+use Doctrine\ORM\Tools\Console\ApplicationCompatibility;
 use Doctrine\ORM\Tools\Console\Command\ValidateSchemaCommand;
 use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
 use Doctrine\Tests\OrmFunctionalTestCase;
@@ -22,6 +23,8 @@ use function method_exists;
 #[CoversClass(ValidateSchemaCommand::class)]
 class ValidateSchemaCommandTest extends OrmFunctionalTestCase
 {
+    use ApplicationCompatibility;
+
     private ValidateSchemaCommand $command;
 
     private CommandTester $tester;
@@ -39,7 +42,7 @@ class ValidateSchemaCommandTest extends OrmFunctionalTestCase
         }
 
         $application = new Application();
-        $application->add(new ValidateSchemaCommand(new SingleManagerProvider($this->_em)));
+        self::addCommandToApplication($application, new ValidateSchemaCommand(new SingleManagerProvider($this->_em)));
 
         $this->command = $application->find('orm:validate-schema');
         $this->tester  = new CommandTester($this->command);

tests/Tests/ORM/UnitOfWorkTest.php

@@ -20,6 +20,7 @@ use Doctrine\ORM\Mapping\Entity;
 use Doctrine\ORM\Mapping\GeneratedValue;
 use Doctrine\ORM\Mapping\Id;
 use Doctrine\ORM\Mapping\ManyToOne;
+use Doctrine\ORM\Mapping\MappingException;
 use Doctrine\ORM\Mapping\Version;
 use Doctrine\ORM\OptimisticLockException;
 use Doctrine\ORM\ORMInvalidArgumentException;
@@ -40,6 +41,7 @@ use PHPUnit\Framework\MockObject\MockObject;
 use stdClass;
 
 use function enum_exists;
+use function is_object;
 use function random_int;
 use function uniqid;
 
@@ -278,7 +280,19 @@ class UnitOfWorkTest extends OrmTestCase
         $user->username = 'John';
         $user->avatar   = $invalidValue;
 
-        $this->expectException(ORMInvalidArgumentException::class);
+        if (
+            is_object($invalidValue) &&
+            ! $invalidValue instanceof ArrayCollection &&
+            $this->_emMock->getConfiguration()->isNativeLazyObjectsEnabled()
+        ) {
+            // in the case of stdClass, the changeset is rejected because
+            // stdClass is not a valid entity
+            // when using native lazy objects, this happens because UnitOfWork::isUninitializedObject()
+            // needs to load the class metadata to do its job
+            $this->expectException(MappingException::class);
+        } else {
+            $this->expectException(ORMInvalidArgumentException::class);
+        }
 
         $this->_unitOfWork->computeChangeSet($metadata, $user);
     }

tests/Tests/OrmFunctionalTestCase.php

@@ -194,6 +194,7 @@ use function strtolower;
 use function var_export;
 
 use const PHP_EOL;
+use const PHP_VERSION_ID;
 
 /**
  * Base testcase class for all functional ORM testcases.
@@ -938,6 +939,19 @@ abstract class OrmFunctionalTestCase extends OrmTestCase
             $this->isSecondLevelCacheEnabled = true;
         }
 
+        $enableNativeLazyObjects = getenv('ENABLE_NATIVE_LAZY_OBJECTS');
+
+        if ($enableNativeLazyObjects === false) {
+            // If the environment variable is not set, we default to true.
+            // This is OK because environment variables are always strings, and
+            // we are comparing it to a boolean.
+            $enableNativeLazyObjects = true;
+        }
+
+        if (PHP_VERSION_ID >= 80400 && $enableNativeLazyObjects) {
+            $config->enableNativeLazyObjects(true);
+        }
+
         $config->setMetadataDriverImpl(
             $mappingDriver ?? new AttributeDriver([
                 realpath(__DIR__ . '/Models/Cache'),
@@ -1120,4 +1134,9 @@ abstract class OrmFunctionalTestCase extends OrmTestCase
     {
         return $this->_em->getUnitOfWork()->isUninitializedObject($entity);
     }
+
+    final protected function initializeObject(object $entity): void
+    {
+        $this->_em->getUnitOfWork()->initializeObject($entity);
+    }
 }

tests/Tests/TestUtil.php

@@ -19,12 +19,14 @@ use function class_exists;
 use function explode;
 use function fwrite;
 use function get_debug_type;
+use function getenv;
 use function in_array;
 use function sprintf;
 use function str_starts_with;
 use function strlen;
 use function substr;
 
+use const PHP_VERSION_ID;
 use const STDERR;
 
 /**
@@ -89,8 +91,23 @@ class TestUtil
 
     public static function configureProxies(Configuration $configuration): void
     {
+        $enableNativeLazyObjects = getenv('ENABLE_NATIVE_LAZY_OBJECTS');
+
+        if ($enableNativeLazyObjects === false) {
+            // If the environment variable is not set, we default to true.
+            // This is OK because environment variables are always strings, and
+            // we are comparing it to a boolean.
+            $enableNativeLazyObjects = true;
+        }
+
         $configuration->setProxyDir(__DIR__ . '/Proxies');
         $configuration->setProxyNamespace('Doctrine\Tests\Proxies');
+
+        if (PHP_VERSION_ID >= 80400 && $enableNativeLazyObjects) {
+            $configuration->enableNativeLazyObjects(true);
+
+            return;
+        }
     }
 
     private static function initializeDatabase(): void