Finished
401401 with self.assertWarnsMessage(RemovedInDjango50Warning, msg):
402402 Book.objects.prefetch_related("authors").iterator()
403403
404 def test_prefetch_with_sliced_queryset(self):
405 """
406 Prefetch objects should work with sliced querysets.
407 """
408 # Test with [:3] slice
409 with self.assertNumQueries(2):
410 books = list(
411 Author.objects.prefetch_related(
412 Prefetch(
413 "books",
414 queryset=Book.objects.all()[:3],
415 to_attr="example_books",
416 )
417 )
418 )
419
420 # Check that each author has at most 3 books
421 for author in books:
422 self.assertLessEqual(len(author.example_books), 3)
423
424 # Test with [1:3] slice
425 with self.assertNumQueries(2):
426 books = list(
427 Author.objects.prefetch_related(
428 Prefetch(
429 "books",
430 queryset=Book.objects.all()[1:3],
431 to_attr="example_books",
432 )
433 )
434 )
435
436 # Check that each author has at most 2 books (slice [1:3])
437 for author in books:
438 self.assertLessEqual(len(author.example_books), 2)
439
404440
405441class RawQuerySetTests(TestDataMixin, TestCase):
406442 def test_basic(self):
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
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_attribute_error (prefetch_related.tests.PrefetchRelatedTests)
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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