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770 lines
30 KiB
Python
770 lines
30 KiB
Python
from django.contrib.contenttypes.models import ContentType
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from django.core.exceptions import FieldError
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from django.db.models import Q
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from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
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from .models import (
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AllowsNullGFK,
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Animal,
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Carrot,
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Comparison,
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ConcreteRelatedModel,
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ForConcreteModelModel,
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ForProxyModelModel,
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Gecko,
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ManualPK,
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Mineral,
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ProxyRelatedModel,
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Rock,
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TaggedItem,
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ValuableRock,
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ValuableTaggedItem,
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Vegetable,
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)
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class GenericRelationsTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.lion = Animal.objects.create(common_name="Lion", latin_name="Panthera leo")
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cls.platypus = Animal.objects.create(
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common_name="Platypus",
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latin_name="Ornithorhynchus anatinus",
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)
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Vegetable.objects.create(name="Eggplant", is_yucky=True)
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cls.bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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cls.quartz = Mineral.objects.create(name="Quartz", hardness=7)
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# Tagging stuff.
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cls.fatty = cls.bacon.tags.create(tag="fatty")
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cls.salty = cls.bacon.tags.create(tag="salty")
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cls.yellow = cls.lion.tags.create(tag="yellow")
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cls.hairy = cls.lion.tags.create(tag="hairy")
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def comp_func(self, obj):
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# Original list of tags:
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return obj.tag, obj.content_type.model_class(), obj.object_id
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async def test_generic_async_acreate(self):
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await self.bacon.tags.acreate(tag="orange")
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self.assertEqual(await self.bacon.tags.acount(), 3)
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def test_generic_update_or_create_when_created(self):
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"""
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Should be able to use update_or_create from the generic related manager
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to create a tag. Refs #23611.
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"""
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count = self.bacon.tags.count()
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tag, created = self.bacon.tags.update_or_create(tag="stinky")
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self.assertTrue(created)
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self.assertEqual(count + 1, self.bacon.tags.count())
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def test_generic_update_or_create_when_updated(self):
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"""
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Should be able to use update_or_create from the generic related manager
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to update a tag. Refs #23611.
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"""
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count = self.bacon.tags.count()
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tag = self.bacon.tags.create(tag="stinky")
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self.assertEqual(count + 1, self.bacon.tags.count())
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tag, created = self.bacon.tags.update_or_create(
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defaults={"tag": "juicy"}, id=tag.id
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)
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self.assertFalse(created)
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self.assertEqual(count + 1, self.bacon.tags.count())
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self.assertEqual(tag.tag, "juicy")
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async def test_generic_async_aupdate_or_create(self):
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tag, created = await self.bacon.tags.aupdate_or_create(
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id=self.fatty.id, defaults={"tag": "orange"}
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)
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self.assertIs(created, False)
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self.assertEqual(tag.tag, "orange")
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self.assertEqual(await self.bacon.tags.acount(), 2)
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tag, created = await self.bacon.tags.aupdate_or_create(tag="pink")
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self.assertIs(created, True)
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self.assertEqual(await self.bacon.tags.acount(), 3)
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self.assertEqual(tag.tag, "pink")
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def test_generic_get_or_create_when_created(self):
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"""
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Should be able to use get_or_create from the generic related manager
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to create a tag. Refs #23611.
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"""
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count = self.bacon.tags.count()
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tag, created = self.bacon.tags.get_or_create(tag="stinky")
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self.assertTrue(created)
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self.assertEqual(count + 1, self.bacon.tags.count())
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def test_generic_get_or_create_when_exists(self):
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"""
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Should be able to use get_or_create from the generic related manager
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to get a tag. Refs #23611.
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"""
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count = self.bacon.tags.count()
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tag = self.bacon.tags.create(tag="stinky")
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self.assertEqual(count + 1, self.bacon.tags.count())
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tag, created = self.bacon.tags.get_or_create(
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id=tag.id, defaults={"tag": "juicy"}
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)
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self.assertFalse(created)
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self.assertEqual(count + 1, self.bacon.tags.count())
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# shouldn't had changed the tag
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self.assertEqual(tag.tag, "stinky")
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async def test_generic_async_aget_or_create(self):
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tag, created = await self.bacon.tags.aget_or_create(
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id=self.fatty.id, defaults={"tag": "orange"}
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)
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self.assertIs(created, False)
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self.assertEqual(tag.tag, "fatty")
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self.assertEqual(await self.bacon.tags.acount(), 2)
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tag, created = await self.bacon.tags.aget_or_create(tag="orange")
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self.assertIs(created, True)
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self.assertEqual(await self.bacon.tags.acount(), 3)
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self.assertEqual(tag.tag, "orange")
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def test_generic_relations_m2m_mimic(self):
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"""
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Objects with declared GenericRelations can be tagged directly -- the
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API mimics the many-to-many API.
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"""
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self.assertSequenceEqual(self.lion.tags.all(), [self.hairy, self.yellow])
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self.assertSequenceEqual(self.bacon.tags.all(), [self.fatty, self.salty])
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def test_access_content_object(self):
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"""
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Test accessing the content object like a foreign key.
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"""
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tagged_item = TaggedItem.objects.get(tag="salty")
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self.assertEqual(tagged_item.content_object, self.bacon)
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def test_query_content_object(self):
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qs = TaggedItem.objects.filter(animal__isnull=False).order_by(
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"animal__common_name", "tag"
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)
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self.assertSequenceEqual(qs, [self.hairy, self.yellow])
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mpk = ManualPK.objects.create(id=1)
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mpk.tags.create(tag="mpk")
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qs = TaggedItem.objects.filter(
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Q(animal__isnull=False) | Q(manualpk__id=1)
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).order_by("tag")
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self.assertQuerySetEqual(qs, ["hairy", "mpk", "yellow"], lambda x: x.tag)
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def test_exclude_generic_relations(self):
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"""
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Test lookups over an object without GenericRelations.
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"""
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# Recall that the Mineral class doesn't have an explicit GenericRelation
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# defined. That's OK, because you can create TaggedItems explicitly.
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# However, excluding GenericRelations means your lookups have to be a
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# bit more explicit.
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shiny = TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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clearish = TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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ctype = ContentType.objects.get_for_model(self.quartz)
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q = TaggedItem.objects.filter(
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content_type__pk=ctype.id, object_id=self.quartz.id
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)
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self.assertSequenceEqual(q, [clearish, shiny])
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def test_access_via_content_type(self):
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"""
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Test lookups through content type.
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"""
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self.lion.delete()
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self.platypus.tags.create(tag="fatty")
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ctype = ContentType.objects.get_for_model(self.platypus)
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self.assertSequenceEqual(
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Animal.objects.filter(tags__content_type=ctype),
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[self.platypus],
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)
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def test_set_foreign_key(self):
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"""
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You can set a generic foreign key in the way you'd expect.
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"""
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tag1 = TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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tag1.content_object = self.platypus
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tag1.save()
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self.assertSequenceEqual(self.platypus.tags.all(), [tag1])
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def test_queries_across_generic_relations(self):
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"""
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Queries across generic relations respect the content types. Even though
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there are two TaggedItems with a tag of "fatty", this query only pulls
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out the one with the content type related to Animals.
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"""
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self.assertSequenceEqual(
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Animal.objects.order_by("common_name"),
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[self.lion, self.platypus],
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)
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def test_queries_content_type_restriction(self):
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"""
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Create another fatty tagged instance with different PK to ensure there
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is a content type restriction in the generated queries below.
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"""
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mpk = ManualPK.objects.create(id=self.lion.pk)
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mpk.tags.create(tag="fatty")
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self.platypus.tags.create(tag="fatty")
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self.assertSequenceEqual(
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Animal.objects.filter(tags__tag="fatty"),
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[self.platypus],
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)
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self.assertSequenceEqual(
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Animal.objects.exclude(tags__tag="fatty"),
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[self.lion],
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)
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def test_object_deletion_with_generic_relation(self):
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"""
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If you delete an object with an explicit Generic relation, the related
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objects are deleted when the source object is deleted.
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"""
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self.assertQuerySetEqual(
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TaggedItem.objects.all(),
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[
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("fatty", Vegetable, self.bacon.pk),
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("hairy", Animal, self.lion.pk),
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("salty", Vegetable, self.bacon.pk),
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("yellow", Animal, self.lion.pk),
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],
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self.comp_func,
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)
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self.lion.delete()
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self.assertQuerySetEqual(
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TaggedItem.objects.all(),
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[
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("fatty", Vegetable, self.bacon.pk),
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("salty", Vegetable, self.bacon.pk),
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],
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self.comp_func,
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)
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def test_object_deletion_without_generic_relation(self):
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"""
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If Generic Relation is not explicitly defined, any related objects
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remain after deletion of the source object.
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"""
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TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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quartz_pk = self.quartz.pk
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self.quartz.delete()
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self.assertQuerySetEqual(
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TaggedItem.objects.all(),
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[
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("clearish", Mineral, quartz_pk),
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("fatty", Vegetable, self.bacon.pk),
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("hairy", Animal, self.lion.pk),
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("salty", Vegetable, self.bacon.pk),
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("yellow", Animal, self.lion.pk),
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],
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self.comp_func,
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)
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def test_tag_deletion_related_objects_unaffected(self):
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"""
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If you delete a tag, the objects using the tag are unaffected (other
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than losing a tag).
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"""
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ctype = ContentType.objects.get_for_model(self.lion)
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tag = TaggedItem.objects.get(
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content_type__pk=ctype.id, object_id=self.lion.id, tag="hairy"
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)
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tag.delete()
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self.assertSequenceEqual(self.lion.tags.all(), [self.yellow])
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self.assertQuerySetEqual(
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TaggedItem.objects.all(),
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[
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("fatty", Vegetable, self.bacon.pk),
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("salty", Vegetable, self.bacon.pk),
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("yellow", Animal, self.lion.pk),
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],
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self.comp_func,
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)
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def test_add_bulk(self):
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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t1 = TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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t2 = TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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# One update() query.
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with self.assertNumQueries(1):
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bacon.tags.add(t1, t2)
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self.assertEqual(t1.content_object, bacon)
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self.assertEqual(t2.content_object, bacon)
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def test_add_bulk_false(self):
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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t1 = TaggedItem.objects.create(content_object=self.quartz, tag="shiny")
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t2 = TaggedItem.objects.create(content_object=self.quartz, tag="clearish")
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# One save() for each object.
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with self.assertNumQueries(2):
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bacon.tags.add(t1, t2, bulk=False)
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self.assertEqual(t1.content_object, bacon)
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self.assertEqual(t2.content_object, bacon)
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def test_add_rejects_unsaved_objects(self):
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t1 = TaggedItem(content_object=self.quartz, tag="shiny")
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msg = (
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"<TaggedItem: shiny> instance isn't saved. Use bulk=False or save the "
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"object first."
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)
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with self.assertRaisesMessage(ValueError, msg):
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self.bacon.tags.add(t1)
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def test_add_rejects_wrong_instances(self):
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msg = "'TaggedItem' instance expected, got <Animal: Lion>"
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with self.assertRaisesMessage(TypeError, msg):
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self.bacon.tags.add(self.lion)
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async def test_aadd(self):
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bacon = await Vegetable.objects.acreate(name="Bacon", is_yucky=False)
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t1 = await TaggedItem.objects.acreate(content_object=self.quartz, tag="shiny")
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t2 = await TaggedItem.objects.acreate(content_object=self.quartz, tag="fatty")
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await bacon.tags.aadd(t1, t2, bulk=False)
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self.assertEqual(await bacon.tags.acount(), 2)
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def test_set(self):
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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fatty = bacon.tags.create(tag="fatty")
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salty = bacon.tags.create(tag="salty")
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bacon.tags.set([fatty, salty])
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self.assertSequenceEqual(bacon.tags.all(), [fatty, salty])
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bacon.tags.set([fatty])
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self.assertSequenceEqual(bacon.tags.all(), [fatty])
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bacon.tags.set([])
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self.assertSequenceEqual(bacon.tags.all(), [])
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bacon.tags.set([fatty, salty], bulk=False, clear=True)
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self.assertSequenceEqual(bacon.tags.all(), [fatty, salty])
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bacon.tags.set([fatty], bulk=False, clear=True)
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self.assertSequenceEqual(bacon.tags.all(), [fatty])
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bacon.tags.set([], clear=True)
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self.assertSequenceEqual(bacon.tags.all(), [])
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async def test_aset(self):
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bacon = await Vegetable.objects.acreate(name="Bacon", is_yucky=False)
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fatty = await bacon.tags.acreate(tag="fatty")
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await bacon.tags.aset([fatty])
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self.assertEqual(await bacon.tags.acount(), 1)
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await bacon.tags.aset([])
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self.assertEqual(await bacon.tags.acount(), 0)
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await bacon.tags.aset([fatty], bulk=False, clear=True)
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self.assertEqual(await bacon.tags.acount(), 1)
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def test_assign(self):
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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fatty = bacon.tags.create(tag="fatty")
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salty = bacon.tags.create(tag="salty")
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bacon.tags.set([fatty, salty])
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self.assertSequenceEqual(bacon.tags.all(), [fatty, salty])
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bacon.tags.set([fatty])
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self.assertSequenceEqual(bacon.tags.all(), [fatty])
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bacon.tags.set([])
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self.assertSequenceEqual(bacon.tags.all(), [])
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def test_assign_with_queryset(self):
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# Querysets used in reverse GFK assignments are pre-evaluated so their
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# value isn't affected by the clearing operation
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# in ManyRelatedManager.set() (#19816).
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bacon = Vegetable.objects.create(name="Bacon", is_yucky=False)
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bacon.tags.create(tag="fatty")
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bacon.tags.create(tag="salty")
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self.assertEqual(2, bacon.tags.count())
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qs = bacon.tags.filter(tag="fatty")
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bacon.tags.set(qs)
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self.assertEqual(1, bacon.tags.count())
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self.assertEqual(1, qs.count())
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def test_clear(self):
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self.assertSequenceEqual(
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TaggedItem.objects.order_by("tag"),
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[self.fatty, self.hairy, self.salty, self.yellow],
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)
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self.bacon.tags.clear()
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self.assertSequenceEqual(self.bacon.tags.all(), [])
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self.assertSequenceEqual(
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TaggedItem.objects.order_by("tag"),
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[self.hairy, self.yellow],
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)
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async def test_aclear(self):
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await self.bacon.tags.aclear()
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self.assertEqual(await self.bacon.tags.acount(), 0)
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def test_remove(self):
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self.assertSequenceEqual(
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TaggedItem.objects.order_by("tag"),
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[self.fatty, self.hairy, self.salty, self.yellow],
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)
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self.bacon.tags.remove(self.fatty)
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self.assertSequenceEqual(self.bacon.tags.all(), [self.salty])
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self.assertSequenceEqual(
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TaggedItem.objects.order_by("tag"),
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[self.hairy, self.salty, self.yellow],
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)
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async def test_aremove(self):
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await self.bacon.tags.aremove(self.fatty)
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self.assertEqual(await self.bacon.tags.acount(), 1)
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await self.bacon.tags.aremove(self.salty)
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self.assertEqual(await self.bacon.tags.acount(), 0)
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def test_generic_relation_related_name_default(self):
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# GenericRelation isn't usable from the reverse side by default.
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msg = (
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"Cannot resolve keyword 'vegetable' into field. Choices are: "
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"animal, content_object, content_type, content_type_id, id, "
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"manualpk, object_id, tag, valuabletaggeditem"
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)
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with self.assertRaisesMessage(FieldError, msg):
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TaggedItem.objects.filter(vegetable__isnull=True)
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def test_multiple_gfk(self):
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# Simple tests for multiple GenericForeignKeys
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# only uses one model, since the above tests should be sufficient.
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tiger = Animal.objects.create(common_name="tiger")
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cheetah = Animal.objects.create(common_name="cheetah")
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bear = Animal.objects.create(common_name="bear")
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# Create directly
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c1 = Comparison.objects.create(
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first_obj=cheetah, other_obj=tiger, comparative="faster"
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)
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c2 = Comparison.objects.create(
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first_obj=tiger, other_obj=cheetah, comparative="cooler"
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)
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# Create using GenericRelation
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c3 = tiger.comparisons.create(other_obj=bear, comparative="cooler")
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c4 = tiger.comparisons.create(other_obj=cheetah, comparative="stronger")
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self.assertSequenceEqual(cheetah.comparisons.all(), [c1])
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# Filtering works
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self.assertCountEqual(
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tiger.comparisons.filter(comparative="cooler"),
|
|
[c2, c3],
|
|
)
|
|
|
|
# Filtering and deleting works
|
|
subjective = ["cooler"]
|
|
tiger.comparisons.filter(comparative__in=subjective).delete()
|
|
self.assertCountEqual(Comparison.objects.all(), [c1, c4])
|
|
|
|
# If we delete cheetah, Comparisons with cheetah as 'first_obj' will be
|
|
# deleted since Animal has an explicit GenericRelation to Comparison
|
|
# through first_obj. Comparisons with cheetah as 'other_obj' will not
|
|
# be deleted.
|
|
cheetah.delete()
|
|
self.assertSequenceEqual(Comparison.objects.all(), [c4])
|
|
|
|
def test_gfk_subclasses(self):
|
|
# GenericForeignKey should work with subclasses (see #8309)
|
|
quartz = Mineral.objects.create(name="Quartz", hardness=7)
|
|
valuedtag = ValuableTaggedItem.objects.create(
|
|
content_object=quartz, tag="shiny", value=10
|
|
)
|
|
self.assertEqual(valuedtag.content_object, quartz)
|
|
|
|
def test_generic_relation_to_inherited_child(self):
|
|
# GenericRelations to models that use multi-table inheritance work.
|
|
granite = ValuableRock.objects.create(name="granite", hardness=5)
|
|
ValuableTaggedItem.objects.create(
|
|
content_object=granite, tag="countertop", value=1
|
|
)
|
|
self.assertEqual(ValuableRock.objects.filter(tags__value=1).count(), 1)
|
|
# We're generating a slightly inefficient query for tags__tag - we
|
|
# first join ValuableRock -> TaggedItem -> ValuableTaggedItem, and then
|
|
# we fetch tag by joining TaggedItem from ValuableTaggedItem. The last
|
|
# join isn't necessary, as TaggedItem <-> ValuableTaggedItem is a
|
|
# one-to-one join.
|
|
self.assertEqual(ValuableRock.objects.filter(tags__tag="countertop").count(), 1)
|
|
granite.delete() # deleting the rock should delete the related tag.
|
|
self.assertEqual(ValuableTaggedItem.objects.count(), 0)
|
|
|
|
def test_gfk_manager(self):
|
|
# GenericForeignKey should not use the default manager (which may
|
|
# filter objects).
|
|
tailless = Gecko.objects.create(has_tail=False)
|
|
tag = TaggedItem.objects.create(content_object=tailless, tag="lizard")
|
|
self.assertEqual(tag.content_object, tailless)
|
|
|
|
def test_subclasses_with_gen_rel(self):
|
|
"""
|
|
Concrete model subclasses with generic relations work
|
|
correctly (ticket 11263).
|
|
"""
|
|
granite = Rock.objects.create(name="granite", hardness=5)
|
|
TaggedItem.objects.create(content_object=granite, tag="countertop")
|
|
self.assertEqual(Rock.objects.get(tags__tag="countertop"), granite)
|
|
|
|
def test_subclasses_with_parent_gen_rel(self):
|
|
"""
|
|
Generic relations on a base class (Vegetable) work correctly in
|
|
subclasses (Carrot).
|
|
"""
|
|
bear = Carrot.objects.create(name="carrot")
|
|
TaggedItem.objects.create(content_object=bear, tag="orange")
|
|
self.assertEqual(Carrot.objects.get(tags__tag="orange"), bear)
|
|
|
|
def test_get_or_create(self):
|
|
# get_or_create should work with virtual fields (content_object)
|
|
quartz = Mineral.objects.create(name="Quartz", hardness=7)
|
|
tag, created = TaggedItem.objects.get_or_create(
|
|
tag="shiny", defaults={"content_object": quartz}
|
|
)
|
|
self.assertTrue(created)
|
|
self.assertEqual(tag.tag, "shiny")
|
|
self.assertEqual(tag.content_object.id, quartz.id)
|
|
|
|
def test_update_or_create_defaults(self):
|
|
# update_or_create should work with virtual fields (content_object)
|
|
quartz = Mineral.objects.create(name="Quartz", hardness=7)
|
|
diamond = Mineral.objects.create(name="Diamond", hardness=7)
|
|
tag, created = TaggedItem.objects.update_or_create(
|
|
tag="shiny", defaults={"content_object": quartz}
|
|
)
|
|
self.assertTrue(created)
|
|
self.assertEqual(tag.content_object.id, quartz.id)
|
|
|
|
tag, created = TaggedItem.objects.update_or_create(
|
|
tag="shiny", defaults={"content_object": diamond}
|
|
)
|
|
self.assertFalse(created)
|
|
self.assertEqual(tag.content_object.id, diamond.id)
|
|
|
|
def test_query_content_type(self):
|
|
msg = "Field 'content_object' does not generate an automatic reverse relation"
|
|
with self.assertRaisesMessage(FieldError, msg):
|
|
TaggedItem.objects.get(content_object="")
|
|
|
|
def test_unsaved_generic_foreign_key_parent_save(self):
|
|
quartz = Mineral(name="Quartz", hardness=7)
|
|
tagged_item = TaggedItem(tag="shiny", content_object=quartz)
|
|
msg = (
|
|
"save() prohibited to prevent data loss due to unsaved related object "
|
|
"'content_object'."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
tagged_item.save()
|
|
|
|
@skipUnlessDBFeature("has_bulk_insert")
|
|
def test_unsaved_generic_foreign_key_parent_bulk_create(self):
|
|
quartz = Mineral(name="Quartz", hardness=7)
|
|
tagged_item = TaggedItem(tag="shiny", content_object=quartz)
|
|
msg = (
|
|
"bulk_create() prohibited to prevent data loss due to unsaved related "
|
|
"object 'content_object'."
|
|
)
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
TaggedItem.objects.bulk_create([tagged_item])
|
|
|
|
def test_cache_invalidation_for_content_type_id(self):
|
|
# Create a Vegetable and Mineral with the same id.
|
|
new_id = (
|
|
max(
|
|
Vegetable.objects.order_by("-id")[0].id,
|
|
Mineral.objects.order_by("-id")[0].id,
|
|
)
|
|
+ 1
|
|
)
|
|
broccoli = Vegetable.objects.create(id=new_id, name="Broccoli")
|
|
diamond = Mineral.objects.create(id=new_id, name="Diamond", hardness=7)
|
|
tag = TaggedItem.objects.create(content_object=broccoli, tag="yummy")
|
|
tag.content_type = ContentType.objects.get_for_model(diamond)
|
|
self.assertEqual(tag.content_object, diamond)
|
|
|
|
def test_cache_invalidation_for_object_id(self):
|
|
broccoli = Vegetable.objects.create(name="Broccoli")
|
|
cauliflower = Vegetable.objects.create(name="Cauliflower")
|
|
tag = TaggedItem.objects.create(content_object=broccoli, tag="yummy")
|
|
tag.object_id = cauliflower.id
|
|
self.assertEqual(tag.content_object, cauliflower)
|
|
|
|
def test_assign_content_object_in_init(self):
|
|
spinach = Vegetable(name="spinach")
|
|
tag = TaggedItem(content_object=spinach)
|
|
self.assertEqual(tag.content_object, spinach)
|
|
|
|
def test_create_after_prefetch(self):
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [])
|
|
weird_tag = platypus.tags.create(tag="weird")
|
|
self.assertSequenceEqual(platypus.tags.all(), [weird_tag])
|
|
|
|
def test_add_after_prefetch(self):
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [])
|
|
weird_tag = TaggedItem.objects.create(tag="weird", content_object=platypus)
|
|
platypus.tags.add(weird_tag)
|
|
self.assertSequenceEqual(platypus.tags.all(), [weird_tag])
|
|
|
|
def test_remove_after_prefetch(self):
|
|
weird_tag = self.platypus.tags.create(tag="weird")
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [weird_tag])
|
|
platypus.tags.remove(weird_tag)
|
|
self.assertSequenceEqual(platypus.tags.all(), [])
|
|
|
|
def test_clear_after_prefetch(self):
|
|
weird_tag = self.platypus.tags.create(tag="weird")
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [weird_tag])
|
|
platypus.tags.clear()
|
|
self.assertSequenceEqual(platypus.tags.all(), [])
|
|
|
|
def test_set_after_prefetch(self):
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [])
|
|
furry_tag = TaggedItem.objects.create(tag="furry", content_object=platypus)
|
|
platypus.tags.set([furry_tag])
|
|
self.assertSequenceEqual(platypus.tags.all(), [furry_tag])
|
|
weird_tag = TaggedItem.objects.create(tag="weird", content_object=platypus)
|
|
platypus.tags.set([weird_tag])
|
|
self.assertSequenceEqual(platypus.tags.all(), [weird_tag])
|
|
|
|
def test_add_then_remove_after_prefetch(self):
|
|
furry_tag = self.platypus.tags.create(tag="furry")
|
|
platypus = Animal.objects.prefetch_related("tags").get(pk=self.platypus.pk)
|
|
self.assertSequenceEqual(platypus.tags.all(), [furry_tag])
|
|
weird_tag = self.platypus.tags.create(tag="weird")
|
|
platypus.tags.add(weird_tag)
|
|
self.assertSequenceEqual(platypus.tags.all(), [furry_tag, weird_tag])
|
|
platypus.tags.remove(weird_tag)
|
|
self.assertSequenceEqual(platypus.tags.all(), [furry_tag])
|
|
|
|
def test_prefetch_related_different_content_types(self):
|
|
TaggedItem.objects.create(content_object=self.platypus, tag="prefetch_tag_1")
|
|
TaggedItem.objects.create(
|
|
content_object=Vegetable.objects.create(name="Broccoli"),
|
|
tag="prefetch_tag_2",
|
|
)
|
|
TaggedItem.objects.create(
|
|
content_object=Animal.objects.create(common_name="Bear"),
|
|
tag="prefetch_tag_3",
|
|
)
|
|
qs = TaggedItem.objects.filter(
|
|
tag__startswith="prefetch_tag_",
|
|
).prefetch_related("content_object", "content_object__tags")
|
|
with self.assertNumQueries(4):
|
|
tags = list(qs)
|
|
for tag in tags:
|
|
self.assertSequenceEqual(tag.content_object.tags.all(), [tag])
|
|
|
|
def test_prefetch_related_custom_object_id(self):
|
|
tiger = Animal.objects.create(common_name="tiger")
|
|
cheetah = Animal.objects.create(common_name="cheetah")
|
|
Comparison.objects.create(
|
|
first_obj=cheetah,
|
|
other_obj=tiger,
|
|
comparative="faster",
|
|
)
|
|
Comparison.objects.create(
|
|
first_obj=tiger,
|
|
other_obj=cheetah,
|
|
comparative="cooler",
|
|
)
|
|
qs = Comparison.objects.prefetch_related("first_obj__comparisons")
|
|
for comparison in qs:
|
|
self.assertSequenceEqual(
|
|
comparison.first_obj.comparisons.all(), [comparison]
|
|
)
|
|
|
|
|
|
class ProxyRelatedModelTest(TestCase):
|
|
def test_default_behavior(self):
|
|
"""
|
|
The default for for_concrete_model should be True
|
|
"""
|
|
base = ForConcreteModelModel()
|
|
base.obj = rel = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForConcreteModelModel.objects.get(pk=base.pk)
|
|
rel = ConcreteRelatedModel.objects.get(pk=rel.pk)
|
|
self.assertEqual(base.obj, rel)
|
|
|
|
def test_works_normally(self):
|
|
"""
|
|
When for_concrete_model is False, we should still be able to get
|
|
an instance of the concrete class.
|
|
"""
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
self.assertEqual(base.obj, rel)
|
|
|
|
def test_proxy_is_returned(self):
|
|
"""
|
|
Instances of the proxy should be returned when
|
|
for_concrete_model is False.
|
|
"""
|
|
base = ForProxyModelModel()
|
|
base.obj = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
self.assertIsInstance(base.obj, ProxyRelatedModel)
|
|
|
|
def test_query(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
self.assertEqual(rel, ConcreteRelatedModel.objects.get(bases__id=base.id))
|
|
|
|
def test_query_proxy(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = rel = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
self.assertEqual(rel, ProxyRelatedModel.objects.get(bases__id=base.id))
|
|
|
|
def test_generic_relation(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = ProxyRelatedModel.objects.create()
|
|
base.save()
|
|
|
|
base = ForProxyModelModel.objects.get(pk=base.pk)
|
|
rel = ProxyRelatedModel.objects.get(pk=base.obj.pk)
|
|
self.assertEqual(base, rel.bases.get())
|
|
|
|
def test_generic_relation_set(self):
|
|
base = ForProxyModelModel()
|
|
base.obj = ConcreteRelatedModel.objects.create()
|
|
base.save()
|
|
newrel = ConcreteRelatedModel.objects.create()
|
|
|
|
newrel.bases.set([base])
|
|
newrel = ConcreteRelatedModel.objects.get(pk=newrel.pk)
|
|
self.assertEqual(base, newrel.bases.get())
|
|
|
|
|
|
class TestInitWithNoneArgument(SimpleTestCase):
|
|
def test_none_allowed(self):
|
|
# AllowsNullGFK doesn't require a content_type, so None argument should
|
|
# also be allowed.
|
|
AllowsNullGFK(content_object=None)
|
|
# TaggedItem requires a content_type but initializing with None should
|
|
# be allowed.
|
|
TaggedItem(content_object=None)
|