mirror of
https://github.com/php/doc-es.git
synced 2026-03-26 00:12:06 +01:00
48db252cf2
git-svn-id: https://svn.php.net/repository/phpdoc/es/trunk@334831 c90b9560-bf6c-de11-be94-00142212c4b1
93 lines
2.2 KiB
XML
93 lines
2.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<!-- EN-Revision: 565e478d69a9d0c217eda773c77ca823423adf21 Maintainer: seros Status: ready -->
|
|
<!-- Reviewed: yes Maintainer: seros -->
|
|
|
|
<chapter xml:id="mongo.writes" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
|
|
<title>Escrituras</title>
|
|
<section>
|
|
<title>Actualización de objetos anidados</title>
|
|
|
|
<para>
|
|
Supongamos que queremos cambiar el nombre del autor de un comentario en este documento:
|
|
|
|
<programlisting role="javascript">
|
|
<![CDATA[
|
|
{
|
|
"_id" : ObjectId("4b06c282edb87a281e09dad9"),
|
|
"content" : "this is a blog post.",
|
|
"comments" :
|
|
[
|
|
{
|
|
"author" : "Mike",
|
|
"comment" : "I think that blah blah blah...",
|
|
},
|
|
{
|
|
"author" : "John",
|
|
"comment" : "I disagree."
|
|
}
|
|
]
|
|
}
|
|
]]>
|
|
</programlisting>
|
|
|
|
Para cambiar un campo interno usamos $set (de manera que el resto de campos no
|
|
se eliminen) con el índice del comentario a cambiar:
|
|
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
|
|
$blog->update($criteria, array('$set' => array("comments.1" => array("author" => "Jim"))));
|
|
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>El operador posicional</title>
|
|
<para>
|
|
El operador posicional <literal>$</literal> es útil a la hora de actualizar objetos
|
|
de arrays. En el ejemplo anterior, por ejemplo, podríamos no conocer el índice del
|
|
comentario que necesitamos modificar; sólo sabemos que queremos cambiar "John" a "Jim".
|
|
Podemos usar <literal>$</literal> para lograrlo.
|
|
</para>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
|
|
$blog->update(
|
|
array("comments.author" => "John"),
|
|
array('$set' => array('comments.$.author' => "Jim")));
|
|
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</section>
|
|
|
|
</chapter>
|
|
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|
|
|