id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28723	"RelatedManager.get_prefetch_queryset returns ""wrong"" cache_name"	Mike Hansen	nobody	"Currently, `RelatedManager.get_prefetch_queryset` returns `self.field.related_query_name()` as the `cache_name`.  In the case where no `related_name` has been set on the `ForeignKey`, then this does not match with the `through_attr` used by `get_prefetcher`.

Using the models in `tests/prefetch_related/models.py`,

{{{#!python
BookWithYear.objects.prefetch_related('bookreview_set')
}}}
will use a `through_attr` of `""bookreview_set""`, but `""bookreview""` is what will be placed in `_prefetched_objects_cache`.

I think `related_manager.field.remote_field.get_accessor_name()` should be used instead.

https://github.com/django/django/pull/9259 is a pull request which fixes this issue"	Bug	closed	Database layer (models, ORM)	dev	Normal	fixed			Accepted	1	0	0	0	0	0