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Add alert to "avoid persisting detached entities" #8109

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Jul 5, 2020
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Add alert to "avoid persisting detached entities" #8109

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6 changes: 6 additions & 0 deletions docs/en/reference/working-with-objects.rst
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Expand Up @@ -250,6 +250,12 @@ as follows:
- If X is a detached entity, an exception will be thrown on
flush.

.. caution::

Do not pass detached entities to the persist operation. The persist operation always
considers entities that are not yet known to the ``EntityManager`` as new entities
(refer to the ``STATE_NEW`` constant inside the ``UnitOfWork``).

Removing entities
-----------------

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