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Document that Doctrine associations don't work across different entity managers #8907

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6 changes: 6 additions & 0 deletions doctrine/multiple_entity_managers.rst
Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,12 @@ entity manager that connects to another database might handle the rest.
usually required. Be sure you actually need multiple entity managers before
adding in this layer of complexity.

.. caution::

Entities cannot define associations across different entity managers. If you
need that, there are `several alternatives <https://stackoverflow.com/a/11494543/2804294>`_
that require some custom setup.

The following configuration code shows how you can configure two entity managers:

.. configuration-block::
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