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Improved ManyToManyField.through docs. #13174

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Jul 17, 2020
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Improved ManyToManyField.through docs. #13174

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11 changes: 10 additions & 1 deletion docs/ref/models/fields.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -1818,6 +1818,13 @@ 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
Expand Down Expand Up @@ -1851,7 +1858,9 @@ 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

Expand Down