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[3.1.x] Improved ManyToManyField.through docs. 

Backport of e7fa8aff43 from master
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Adam Johnson 2020-07-10 14:27:31 +01:00 committed by Mariusz Felisiak
parent e63644d37b
commit 32e22f0531
1 changed files with 10 additions and 1 deletions
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11
docs/ref/models/fields.txt
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@ -1837,6 +1837,13 @@ that control how the relationship functions.
:ref:`extra data with a many-to-many relationship
<intermediary-manytomany>`.
.. note::
If you don't want multiple associations between the same instances, add
a :class:`~django.db.models.UniqueConstraint` including the from and to
fields. Django's automatically generated many-to-many tables include
such a constraint.
.. note::
Recursive relationships using an intermediary model and defined as
@ -1870,7 +1877,9 @@ that control how the relationship functions.
points (i.e. the target model instance).
This class can be used to query associated records for a given model
instance like a normal model.
instance like a normal model::
Model.m2mfield.through.objects.all()
.. attribute:: ManyToManyField.through_fields