DDC-3983: Replace metadata factory with pre-runtime (constructor-injected) metadata map #4865

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admin · 2026-01-22T14:50:53+01:00

admin commented

2026-01-22 14:50:53 +01:00

Originally created by @doctrinebot on GitHub (Nov 7, 2015).

Originally assigned to: @guilhermeblanco on GitHub.

Jira issue originally created by user @ocramius:

ORM metadata is currently "lazy" by default:

we inject a metadata driver in the metadata factory
the metadata is mutable, which is causing big headaches
the mix of metadata drivers and ORM functionality makes functional tests around mapping

Instead, we can:

inject the metadata in the ORM entry point ( EntityManager::**construct() or equivalent)
make the metadata lazy (if needed)
make the metadata a simple Map<ClassName, ClassMetadata>

Doing this allows us to completely externalize the mapping drivers, so that they can be maintained by third parties.

This change requires DCOM-308 to be implemented first, as that is the metadata structure that we want to reach first.

Originally created by @doctrinebot on GitHub (Nov 7, 2015). Originally assigned to: @guilhermeblanco on GitHub. Jira issue originally created by user @ocramius: ORM metadata is currently "lazy" by default: - we inject a metadata driver in the metadata factory - the metadata is mutable, which is causing big headaches - the mix of metadata drivers and ORM functionality makes functional tests around mapping Instead, we can: - inject the metadata in the ORM entry point ( `EntityManager::**construct()` or equivalent) - make the metadata lazy (if needed) - make the metadata a simple `Map<ClassName, ClassMetadata>` Doing this allows us to completely externalize the mapping drivers, so that they can be maintained by third parties. This change requires [DCOM-308](http://www.doctrine-project.org/jira/browse/DCOM-308) to be implemented first, as that is the metadata structure that we want to reach first.

admin added the New Feature label 2026-01-22 14:50:53 +01:00

admin closed this issue

2026-01-22 14:50:53 +01:00

admin commented

2026-01-22 14:50:53 +01:00

@doctrinebot commented on GitHub (Nov 7, 2015):

depends on DCOM-308: Create a Mapping Component

@doctrinebot commented on GitHub (Nov 7, 2015): - depends on [DCOM-308: Create a Mapping Component](http://www.doctrine-project.org/jira/browse/DCOM-308)

admin commented

2026-01-22 14:50:53 +01:00

@doctrinebot commented on GitHub (Nov 8, 2015):

Comment created by @beberlei:

How can mapping drivers not be implemented by third parties right now by overriding the Driver interface? I don't see a benefit here.

In applications with 100 entities, loading them all every request is a clear no-go.

@doctrinebot commented on GitHub (Nov 8, 2015): Comment created by @beberlei: How can mapping drivers not be implemented by third parties right now by overriding the Driver interface? I don't see a benefit here. In applications with 100<ins></ins> entities, loading them all every request is a clear no-go.

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Reference: doctrine/archived-orm#4865