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More details on partial objects

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Benjamin Eberlei 2011-10-15 16:14:36 +02:00
parent b88ef8b1a5
commit 6d4337fc71
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en/reference/partial-objects.rst
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@ -15,6 +15,14 @@ of Doctrine2 to this problem is.
``Query#getScalarResult()``, ``Query#getSingleScalarResult()``,
etc.
.. warning::
Use of partial objects is tricky. Fields that are not retrieved
from the database will not be updated by the UnitOfWork even if they
get changed in your objects. You can only promote a partial object
to a fully-loaded object by calling ``EntityManager#refresh()``
or a DQL query with the refresh flag.
What is the problem?
--------------------
@ -60,6 +68,18 @@ keyword as follows:
<?php
$q = $em->createQuery("select partial u.{id,name} from MyApp\Domain\User u");
You can also get a partial reference instead of a proxy reference by
calling:
.. code-block:: php
<?php
$reference = $em->getPartialReference('MyApp\Domain\User', 1);
Partial references are objects with only the identifiers set as they
are passed to the second argument of the ``getPartialReference()`` method.
All other fields are null.
When should I force partial objects?
------------------------------------