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Update signals doc - clarification on EmbeddedDocument

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Since there is a .save() method on EmbeddedDocument, you could be tempted to attach a pre_save event to an EmbeddedDocument (#1720). This update is an attempt to make this clearer.
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Bastien Gérard 2018-08-13 21:21:33 +02:00 committed by Bastien Gérard
parent a0e5cf4ecc
commit 1a2b1f283b
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docs/guide/signals.rst
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@ -113,6 +113,10 @@ handlers within your subclass::
signals.pre_save.connect(Author.pre_save, sender=Author)
signals.post_save.connect(Author.post_save, sender=Author)
.. warning::
Note that EmbeddedDocument only supports pre/post_init signals. pre/post_save, etc should be attached to Document's class only. Attaching pre_save to an EmbeddedDocument is ignored silently.
Finally, you can also use this small decorator to quickly create a number of
signals and attach them to your :class:`~mongoengine.Document` or
:class:`~mongoengine.EmbeddedDocument` subclasses as class decorators::