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404404 instance_attr = self.related.field.get_foreign_related_value
405405 instances_dict = {instance_attr(inst): inst for inst in instances}
406406 query = {"%s__in" % self.related.field.name: instances}
407 queryset = queryset.filter(**query)
407
408 # Handle sliced querysets by applying filters before the slice
409 if queryset.query.is_sliced:
410 # Create a new queryset without the slice to apply filters
411 base_queryset = self.related.related_model._base_manager.db_manager(hints={'instance': instances[0]}).all()
412 base_queryset._add_hints(instance=instances[0])
413 base_queryset = base_queryset.filter(**query)
414 # Apply the original queryset's filters and ordering
415 if queryset.query.where:
416 base_queryset = base_queryset.filter(queryset.query.where)
417 if queryset.query.order_by:
418 base_queryset = base_queryset.order_by(*queryset.query.order_by)
419 # Apply the slice from the original queryset
420 if queryset.query.low_mark is not None or queryset.query.high_mark is not None:
421 base_queryset = base_queryset[queryset.query.low_mark:queryset.query.high_mark]
422 queryset = base_queryset
423 else:
424 queryset = queryset.filter(**query)
408425
409426 # Since we're going to assign directly in the cache,
410427 # we must manage the reverse relation cache manually.
719736 instance_attr = self.field.get_foreign_related_value
720737 instances_dict = {instance_attr(inst): inst for inst in instances}
721738 query = {"%s__in" % self.field.name: instances}
722 queryset = queryset.filter(**query)
739
740 # Handle sliced querysets by applying filters before the slice
741 if queryset.query.is_sliced:
742 # Create a new queryset without the slice to apply filters
743 base_queryset = self.field.remote_field.model._base_manager.using(queryset._db or self._db)
744 base_queryset._add_hints(instance=instances[0])
745 base_queryset = base_queryset.filter(**query)
746 # Apply the original queryset's filters and ordering
747 if queryset.query.where:
748 base_queryset = base_queryset.filter(queryset.query.where)
749 if queryset.query.order_by:
750 base_queryset = base_queryset.order_by(*queryset.query.order_by)
751 # Apply the slice from the original queryset
752 if queryset.query.low_mark is not None or queryset.query.high_mark is not None:
753 base_queryset = base_queryset[queryset.query.low_mark:queryset.query.high_mark]
754 queryset = base_queryset
755 else:
756 queryset = queryset.filter(**query)
723757
724758 # Since we just bypassed this class' get_queryset(), we must manage
725759 # the reverse relation manually.
10521086 queryset = queryset.using(queryset._db or self._db)
10531087
10541088 query = {"%s__in" % self.query_field_name: instances}
1055 queryset = queryset._next_is_sticky().filter(**query)
1056
1057 # M2M: need to annotate the query in order to get the primary model
1058 # that the secondary model was actually related to. We know that
1059 # there will already be a join on the join table, so we can just add
1060 # the select.
1061
1062 # For non-autocreated 'through' models, can't assume we are
1063 # dealing with PK values.
1064 fk = self.through._meta.get_field(self.source_field_name)
1065 join_table = fk.model._meta.db_table
1066 connection = connections[queryset.db]
1067 qn = connection.ops.quote_name
1068 queryset = queryset.extra(
1069 select={
1070 "_prefetch_related_val_%s"
1071 % f.attname: "%s.%s"
1072 % (qn(join_table), qn(f.column))
1073 for f in fk.local_related_fields
1074 }
1075 )
1089
1090 # Handle sliced querysets by applying filters before the slice
1091 if queryset.query.is_sliced:
1092 # Create a new queryset without the slice to apply filters
1093 base_queryset = queryset.model._base_manager.using(queryset._db or self._db)
1094 base_queryset._add_hints(instance=instances[0])
1095 base_queryset = base_queryset.filter(**query)
1096 # Apply the original queryset's filters and ordering
1097 if queryset.query.where:
1098 base_queryset = base_queryset.filter(queryset.query.where)
1099 if queryset.query.order_by:
1100 base_queryset = base_queryset.order_by(*queryset.query.order_by)
1101
1102 # M2M: need to annotate the query in order to get the primary model
1103 # that the secondary model was actually related to. We know that
1104 # there will already be a join on the join table, so we can just add the select.
1105 # For non-autocreated 'through' models, can't assume we are
1106 # dealing with PK values.
1107 fk = self.through._meta.get_field(self.source_field_name)
1108 join_table = fk.model._meta.db_table
1109 connection = connections[queryset.db]
1110 qn = connection.ops.quote_name
1111 base_queryset = base_queryset.extra(
1112 select={
1113 "_prefetch_related_val_%s"
1114 % f.attname: "%s.%s"
1115 % (qn(join_table), qn(f.column))
1116 for f in fk.local_related_fields
1117 }
1118 )
1119
1120 # Apply the slice from the original queryset after all other operations
1121 if queryset.query.low_mark is not None or queryset.query.high_mark is not None:
1122 base_queryset = base_queryset[queryset.query.low_mark:queryset.query.high_mark]
1123 queryset = base_queryset
1124 else:
1125 queryset = queryset._next_is_sticky().filter(**query)
1126
1127 # M2M: need to annotate the query in order to get the primary model
1128 # that the secondary model was actually related to. We know that
1129 # there will already be a join on the join table, so we can just add the select.
1130
1131 # For non-autocreated 'through' models, can't assume we are
1132 # dealing with PK values.
1133 fk = self.through._meta.get_field(self.source_field_name)
1134 join_table = fk.model._meta.db_table
1135 connection = connections[queryset.db]
1136 qn = connection.ops.quote_name
1137 queryset = queryset.extra(
1138 select={
1139 "_prefetch_related_val_%s"
1140 % f.attname: "%s.%s"
1141 % (qn(join_table), qn(f.column))
1142 for f in fk.local_related_fields
1143 }
1144 )
10761145 return (
10771146 queryset,
10781147 lambda result: tuple(
Test NameStatus
test_foreignkey_reverse (prefetch_related.tests.PrefetchLimitTests)
Fail
test_m2m_forward (prefetch_related.tests.PrefetchLimitTests)
Fail
test_m2m_reverse (prefetch_related.tests.PrefetchLimitTests)
Fail
test_reverse_ordering (prefetch_related.tests.PrefetchLimitTests)
Fail
test_attribute_error (prefetch_related.tests.PrefetchRelatedTests)
Fail
The prefetched relationship is used rather than populating the reverse
Pass
test_bug (prefetch_related.tests.Ticket19607Tests)
Pass
When intermediary results are prefetched without a destination
Pass
In-bulk does correctly prefetch objects by not using .iterator()
Pass
test_prefetch_nullable (prefetch_related.tests.NullableTest)
Pass
test_traverse_nullable (prefetch_related.tests.NullableTest)
Pass
test_bug (prefetch_related.tests.Ticket21410Tests)
Pass
test_bug (prefetch_related.tests.Ticket21760Tests)
Pass
test_m2m_then_m2m (prefetch_related.tests.DefaultManagerTests)
Pass
test_order (prefetch_related.tests.LookupOrderingTest)
Pass
test_foreignkey (prefetch_related.tests.ForeignKeyToFieldTest)
Pass
test_m2m (prefetch_related.tests.ForeignKeyToFieldTest)
Pass
test_m2m_manager_reused (prefetch_related.tests.ForeignKeyToFieldTest)
Pass
test_basic (prefetch_related.tests.RawQuerySetTests)
Pass
test_clear (prefetch_related.tests.RawQuerySetTests)
Pass
test_prefetch_before_raw (prefetch_related.tests.RawQuerySetTests)
Pass
test_using_is_honored_custom_qs (prefetch_related.tests.MultiDbTests)
Pass
test_using_is_honored_fkey (prefetch_related.tests.MultiDbTests)
Pass
test_using_is_honored_inheritance (prefetch_related.tests.MultiDbTests)
Pass
test_using_is_honored_m2m (prefetch_related.tests.MultiDbTests)
Pass
test_child_link_prefetch (prefetch_related.tests.MultiTableInheritanceTest)
Pass
test_foreignkey (prefetch_related.tests.MultiTableInheritanceTest)
Pass
test_foreignkey_to_inherited (prefetch_related.tests.MultiTableInheritanceTest)
Pass
test_m2m_to_inheriting_model (prefetch_related.tests.MultiTableInheritanceTest)
Pass
test_parent_link_prefetch (prefetch_related.tests.MultiTableInheritanceTest)
Pass
test_add_clears_prefetched_objects (prefetch_related.tests.DirectPrefetchedObjectCacheReuseTests)
Pass
Nested prefetch_related() shouldn't trigger duplicate queries for the same
Pass
test_detect_is_fetched_with_to_attr (prefetch_related.tests.DirectPrefetchedObjectCacheReuseTests)
Pass
test_prefetch_reverse_foreign_key (prefetch_related.tests.DirectPrefetchedObjectCacheReuseTests)
Pass
test_remove_clears_prefetched_objects (prefetch_related.tests.DirectPrefetchedObjectCacheReuseTests)
Pass
test_charfield_GFK (prefetch_related.tests.GenericRelationTests)
Pass
test_custom_queryset (prefetch_related.tests.GenericRelationTests)
Pass
test_deleted_GFK (prefetch_related.tests.GenericRelationTests)
Pass
test_generic_relation (prefetch_related.tests.GenericRelationTests)
Pass
test_nullable_GFK (prefetch_related.tests.GenericRelationTests)
Pass
test_prefetch_GFK (prefetch_related.tests.GenericRelationTests)
Pass
test_prefetch_GFK_fk_pk (prefetch_related.tests.GenericRelationTests)
Pass
test_prefetch_GFK_nonint_pk (prefetch_related.tests.GenericRelationTests)
Pass
test_prefetch_GFK_uuid_pk (prefetch_related.tests.GenericRelationTests)
Pass
A 'content_object' can be traversed with prefetch_related() and
Pass
test_bool (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_clear (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_count (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_exists (prefetch_related.tests.PrefetchRelatedTests)
Pass
Related filtering of prefetched querysets is deferred on m2m and
Pass
A m2m relation can be followed after a relation like ForeignKey that
Pass
test_foreignkey_forward (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_foreignkey_reverse (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_forward_m2m_to_attr_conflict (prefetch_related.tests.PrefetchRelatedTests)
Pass
Objects retrieved with .get() get the prefetch behavior.
Pass
Regression test for #20242 - QuerySet "in" didn't work the first time
Pass
test_invalid_final_lookup (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_len (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_forward (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_prefetching_iterator_with_chunks (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_prefetching_iterator_without_chunks (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_prefetching_iterator_without_chunks_warning (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_reverse (prefetch_related.tests.PrefetchRelatedTests)
Pass
A m2m can be followed through another m2m.
Pass
test_m2m_then_m2m_object_ids (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_then_reverse_fk_object_ids (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_m2m_then_reverse_one_to_one_object_ids (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_named_values_list (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_onetoone_reverse_no_match (prefetch_related.tests.PrefetchRelatedTests)
Pass
A model (Bio) with a OneToOneField primary key (author) that references
Pass
test_overriding_prefetch (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_prefetch_eq (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_reverse_m2m_to_attr_conflict (prefetch_related.tests.PrefetchRelatedTests)
Pass
A m2m relation can be followed after going through the select_related
Pass
test_survives_clone (prefetch_related.tests.PrefetchRelatedTests)
Pass
test_ambiguous (prefetch_related.tests.CustomPrefetchTests)
Pass
test_custom_qs (prefetch_related.tests.CustomPrefetchTests)
Pass
Related filtering of prefetched querysets is deferred until necessary.
Pass
test_generic_rel (prefetch_related.tests.CustomPrefetchTests)
Pass
test_m2m (prefetch_related.tests.CustomPrefetchTests)
Pass
test_m2m_through_fk (prefetch_related.tests.CustomPrefetchTests)
Pass
test_m2m_through_gfk (prefetch_related.tests.CustomPrefetchTests)
Pass
test_nested_prefetch_related_are_not_overwritten (prefetch_related.tests.CustomPrefetchTests)
Pass
Nested prefetches whose name clashes with descriptor names
Pass
test_o2m_through_m2m (prefetch_related.tests.CustomPrefetchTests)
Pass
test_raw_queryset (prefetch_related.tests.CustomPrefetchTests)
Pass
test_reverse_m2m (prefetch_related.tests.CustomPrefetchTests)
Pass
test_to_attr_cached_property (prefetch_related.tests.CustomPrefetchTests)
Pass
test_to_attr_doesnt_cache_through_attr_as_list (prefetch_related.tests.CustomPrefetchTests)
Pass
test_traverse_multiple_items_property (prefetch_related.tests.CustomPrefetchTests)
Pass
test_traverse_qs (prefetch_related.tests.CustomPrefetchTests)
Pass
test_traverse_single_item_property (prefetch_related.tests.CustomPrefetchTests)
Pass
test_values_queryset (prefetch_related.tests.CustomPrefetchTests)
Pass
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