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Code Issues 32 Releases Wiki Activity

[4.2.x] Fixed #30355 -- Doc'd interaction between custom managers and prefetch_related().

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Backport of 5f2308710b from main
This commit is contained in:
Akash Kumar Sen
2023-05-26 21:28:59 +05:30
committed by Mariusz Felisiak
parent b2355a8df3
commit eb84c068ed
1 changed files with 12 additions and 0 deletions
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docs/topics/db/queries.txt
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@@ -1802,6 +1802,18 @@ methods::
b.entry_set(manager="entries").is_published() b.entry_set(manager="entries").is_published()
.. admonition:: Interaction with prefetching
When calling :meth:`~django.db.models.query.QuerySet.prefetch_related` with
a reverse relation, the default manager will be used. If you want to
prefetch related objects using a custom reverse manager, use
:class:`Prefetch() <django.db.models.Prefetch>`. For example::
from django.db.models import Prefetch
prefetch_manager = Prefetch("entry_set", queryset=Entry.entries.all())
Blog.objects.prefetch_related(prefetch_manager)
Additional methods to handle related objects Additional methods to handle related objects
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~