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[4.2.x] Corrected QuerySet.prefetch_related() note about GenericRelation(). 

GenericRelation is a reverse generic relationship so it's always
homogeneous. Mentioning this as a restriction is confusing.
Backport of 88b5b7b8e5 from main
This commit is contained in:
Mariusz Felisiak 2023-09-16 06:57:38 +02:00
parent 866122690d
commit ff26e6ad84
1 changed files with 5 additions and 4 deletions
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docs/ref/models/querysets.txt
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@ -1161,10 +1161,11 @@ one-to-one.
``prefetch_related``, on the other hand, does a separate lookup for each ``prefetch_related``, on the other hand, does a separate lookup for each
relationship, and does the 'joining' in Python. This allows it to prefetch relationship, and does the 'joining' in Python. This allows it to prefetch
many-to-many and many-to-one objects, which cannot be done using many-to-many, many-to-one, and
``select_related``, in addition to the foreign key and one-to-one relationships :class:`~django.contrib.contenttypes.fields.GenericRelation` objects which
that are supported by ``select_related``. It also supports prefetching of cannot be done using ``select_related``, in addition to the foreign key and
:class:`~django.contrib.contenttypes.fields.GenericRelation` and one-to-one relationships that are supported by ``select_related``. It also
supports prefetching of
:class:`~django.contrib.contenttypes.fields.GenericForeignKey`, however, it :class:`~django.contrib.contenttypes.fields.GenericForeignKey`, however, it
must be restricted to a homogeneous set of results. For example, prefetching must be restricted to a homogeneous set of results. For example, prefetching
objects referenced by a ``GenericForeignKey`` is only supported if the query objects referenced by a ``GenericForeignKey`` is only supported if the query