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docs: use explicit register_delete_rule example

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The previous example of creating bi-directional delete rules was vague since the example defined only one class and the relationship between "Foo" and "Bar" wasn't clear. I added a more explicit example where the relationship between the two classes is explicit.
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Alex Xu 2017-07-10 16:43:24 -04:00 committed by GitHub
parent a8d6e59a7a
commit 437b11af9a
1 changed files with 6 additions and 4 deletions
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10
mongoengine/fields.py
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@ -971,11 +971,13 @@ class ReferenceField(BaseField):
.. code-block:: python .. code-block:: python
class Bar(Document): class Org(Document):
content = StringField() owner = ReferenceField('User')
foo = ReferenceField('Foo')
Foo.register_delete_rule(Bar, 'foo', NULLIFY) class User(Document):
org = ReferenceField('Org', reverse_delete_rule=CASCADE)
User.register_delete_rule(Org, 'owner', DENY)
.. versionchanged:: 0.5 added `reverse_delete_rule` .. versionchanged:: 0.5 added `reverse_delete_rule`
""" """