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
29078	Serializer handle_m2m_field() should honor any previous prefetch	xx396	Zeeshan Khan	"Example:

from django.contrib.auth.models import Group
from django.core import serializers

groups = Group.objects.prefetch_related('permissions').all()
serializers.serialize('json', groups)

This will N+1 query the permissions as handle_m2m_field uses iterator() which bypasses any cache. Suggest serializers/python.py line 78 replaces iterator() with all()"	Cleanup/optimization	closed	Core (Serialization)	2.0	Normal	fixed			Accepted	1	0	0	0	0	0