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321 lines
12 KiB
Python
321 lines
12 KiB
Python
from django.db.models import ProtectedError, Q, Sum
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from django.forms.models import modelform_factory
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from django.test import TestCase, skipIfDBFeature
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from .models import (
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A,
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Address,
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B,
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Board,
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C,
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Cafe,
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CharLink,
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Company,
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Contact,
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Content,
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D,
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Guild,
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HasLinkThing,
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Link,
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Node,
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Note,
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OddRelation1,
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OddRelation2,
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Organization,
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Person,
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Place,
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Related,
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Restaurant,
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Tag,
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Team,
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TextLink,
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)
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class GenericRelationTests(TestCase):
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def test_inherited_models_content_type(self):
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"""
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GenericRelations on inherited classes use the correct content type.
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"""
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p = Place.objects.create(name="South Park")
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r = Restaurant.objects.create(name="Chubby's")
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l1 = Link.objects.create(content_object=p)
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l2 = Link.objects.create(content_object=r)
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self.assertEqual(list(p.links.all()), [l1])
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self.assertEqual(list(r.links.all()), [l2])
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def test_reverse_relation_pk(self):
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"""
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The correct column name is used for the primary key on the
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originating model of a query. See #12664.
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"""
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p = Person.objects.create(account=23, name="Chef")
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Address.objects.create(
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street="123 Anywhere Place",
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city="Conifer",
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state="CO",
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zipcode="80433",
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content_object=p,
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)
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qs = Person.objects.filter(addresses__zipcode="80433")
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self.assertEqual(1, qs.count())
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self.assertEqual("Chef", qs[0].name)
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def test_charlink_delete(self):
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oddrel = OddRelation1.objects.create(name="clink")
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CharLink.objects.create(content_object=oddrel)
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oddrel.delete()
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def test_textlink_delete(self):
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oddrel = OddRelation2.objects.create(name="tlink")
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TextLink.objects.create(content_object=oddrel)
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oddrel.delete()
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def test_coerce_object_id_remote_field_cache_persistence(self):
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restaurant = Restaurant.objects.create()
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CharLink.objects.create(content_object=restaurant)
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charlink = CharLink.objects.latest("pk")
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self.assertIs(charlink.content_object, charlink.content_object)
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# If the model (Cafe) uses more than one level of multi-table inheritance.
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cafe = Cafe.objects.create()
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CharLink.objects.create(content_object=cafe)
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charlink = CharLink.objects.latest("pk")
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self.assertIs(charlink.content_object, charlink.content_object)
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def test_q_object_or(self):
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"""
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SQL query parameters for generic relations are properly
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grouped when OR is used (#11535).
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In this bug the first query (below) works while the second, with the
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query parameters the same but in reverse order, does not.
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The issue is that the generic relation conditions do not get properly
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grouped in parentheses.
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"""
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note_contact = Contact.objects.create()
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org_contact = Contact.objects.create()
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Note.objects.create(note="note", content_object=note_contact)
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org = Organization.objects.create(name="org name")
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org.contacts.add(org_contact)
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# search with a non-matching note and a matching org name
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qs = Contact.objects.filter(
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Q(notes__note__icontains=r"other note")
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| Q(organizations__name__icontains=r"org name")
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)
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self.assertIn(org_contact, qs)
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# search again, with the same query parameters, in reverse order
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qs = Contact.objects.filter(
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Q(organizations__name__icontains=r"org name")
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| Q(notes__note__icontains=r"other note")
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)
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self.assertIn(org_contact, qs)
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def test_join_reuse(self):
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qs = Person.objects.filter(addresses__street="foo").filter(
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addresses__street="bar"
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)
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self.assertEqual(str(qs.query).count("JOIN"), 2)
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def test_generic_relation_ordering(self):
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"""
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Ordering over a generic relation does not include extraneous
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duplicate results, nor excludes rows not participating in the relation.
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"""
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p1 = Place.objects.create(name="South Park")
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p2 = Place.objects.create(name="The City")
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c = Company.objects.create(name="Chubby's Intl.")
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Link.objects.create(content_object=p1)
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Link.objects.create(content_object=c)
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places = list(Place.objects.order_by("links__id"))
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def count_places(place):
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return len([p for p in places if p.id == place.id])
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self.assertEqual(len(places), 2)
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self.assertEqual(count_places(p1), 1)
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self.assertEqual(count_places(p2), 1)
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def test_target_model_len_zero(self):
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"""
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Saving a model with a GenericForeignKey to a model instance whose
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__len__ method returns 0 (Team.__len__() here) shouldn't fail (#13085).
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"""
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team1 = Team.objects.create(name="Backend devs")
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note = Note(note="Deserve a bonus", content_object=team1)
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note.save()
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def test_target_model_bool_false(self):
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"""
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Saving a model with a GenericForeignKey to a model instance whose
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__bool__ method returns False (Guild.__bool__() here) shouldn't fail
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(#13085).
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"""
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g1 = Guild.objects.create(name="First guild")
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note = Note(note="Note for guild", content_object=g1)
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note.save()
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@skipIfDBFeature("interprets_empty_strings_as_nulls")
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def test_gfk_to_model_with_empty_pk(self):
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"""Test related to #13085"""
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# Saving model with GenericForeignKey to model instance with an
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# empty CharField PK
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b1 = Board.objects.create(name="")
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tag = Tag(label="VP", content_object=b1)
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tag.save()
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def test_ticket_20378(self):
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# Create a couple of extra HasLinkThing so that the autopk value
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# isn't the same for Link and HasLinkThing.
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hs1 = HasLinkThing.objects.create()
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hs2 = HasLinkThing.objects.create()
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hs3 = HasLinkThing.objects.create()
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hs4 = HasLinkThing.objects.create()
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l1 = Link.objects.create(content_object=hs3)
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l2 = Link.objects.create(content_object=hs4)
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self.assertSequenceEqual(HasLinkThing.objects.filter(links=l1), [hs3])
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self.assertSequenceEqual(HasLinkThing.objects.filter(links=l2), [hs4])
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self.assertSequenceEqual(
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HasLinkThing.objects.exclude(links=l2), [hs1, hs2, hs3]
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)
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self.assertSequenceEqual(
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HasLinkThing.objects.exclude(links=l1), [hs1, hs2, hs4]
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)
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def test_ticket_20564(self):
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b1 = B.objects.create()
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b2 = B.objects.create()
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b3 = B.objects.create()
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c1 = C.objects.create(b=b1)
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c2 = C.objects.create(b=b2)
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c3 = C.objects.create(b=b3)
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A.objects.create(flag=None, content_object=b1)
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A.objects.create(flag=True, content_object=b2)
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self.assertSequenceEqual(C.objects.filter(b__a__flag=None), [c1, c3])
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self.assertSequenceEqual(C.objects.exclude(b__a__flag=None), [c2])
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def test_ticket_20564_nullable_fk(self):
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b1 = B.objects.create()
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b2 = B.objects.create()
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b3 = B.objects.create()
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d1 = D.objects.create(b=b1)
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d2 = D.objects.create(b=b2)
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d3 = D.objects.create(b=b3)
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d4 = D.objects.create()
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A.objects.create(flag=None, content_object=b1)
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A.objects.create(flag=True, content_object=b1)
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A.objects.create(flag=True, content_object=b2)
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self.assertSequenceEqual(D.objects.exclude(b__a__flag=None), [d2])
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self.assertSequenceEqual(D.objects.filter(b__a__flag=None), [d1, d3, d4])
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self.assertSequenceEqual(B.objects.filter(a__flag=None), [b1, b3])
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self.assertSequenceEqual(B.objects.exclude(a__flag=None), [b2])
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def test_extra_join_condition(self):
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# A crude check that content_type_id is taken in account in the
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# join/subquery condition.
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self.assertIn(
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"content_type_id", str(B.objects.exclude(a__flag=None).query).lower()
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)
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# No need for any joins - the join from inner query can be trimmed in
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# this case (but not in the above case as no a objects at all for given
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# B would then fail).
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self.assertNotIn(" join ", str(B.objects.exclude(a__flag=True).query).lower())
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self.assertIn(
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"content_type_id", str(B.objects.exclude(a__flag=True).query).lower()
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)
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def test_annotate(self):
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hs1 = HasLinkThing.objects.create()
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hs2 = HasLinkThing.objects.create()
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HasLinkThing.objects.create()
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b = Board.objects.create(name=str(hs1.pk))
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Link.objects.create(content_object=hs2)
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link = Link.objects.create(content_object=hs1)
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Link.objects.create(content_object=b)
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qs = HasLinkThing.objects.annotate(Sum("links")).filter(pk=hs1.pk)
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# If content_type restriction isn't in the query's join condition,
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# then wrong results are produced here as the link to b will also match
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# (b and hs1 have equal pks).
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self.assertEqual(qs.count(), 1)
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self.assertEqual(qs[0].links__sum, link.id)
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link.delete()
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# Now if we don't have proper left join, we will not produce any
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# results at all here.
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# clear cached results
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qs = qs.all()
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self.assertEqual(qs.count(), 1)
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# Note - 0 here would be a nicer result...
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self.assertIs(qs[0].links__sum, None)
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# Finally test that filtering works.
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self.assertEqual(qs.filter(links__sum__isnull=True).count(), 1)
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self.assertEqual(qs.filter(links__sum__isnull=False).count(), 0)
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def test_filter_targets_related_pk(self):
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# Use hardcoded PKs to ensure different PKs for "link" and "hs2"
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# objects.
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HasLinkThing.objects.create(pk=1)
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hs2 = HasLinkThing.objects.create(pk=2)
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link = Link.objects.create(content_object=hs2, pk=1)
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self.assertNotEqual(link.object_id, link.pk)
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self.assertSequenceEqual(HasLinkThing.objects.filter(links=link.pk), [hs2])
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def test_editable_generic_rel(self):
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GenericRelationForm = modelform_factory(HasLinkThing, fields="__all__")
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form = GenericRelationForm()
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self.assertIn("links", form.fields)
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form = GenericRelationForm({"links": None})
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self.assertTrue(form.is_valid())
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form.save()
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links = HasLinkThing._meta.get_field("links")
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self.assertEqual(links.save_form_data_calls, 1)
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def test_ticket_22998(self):
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related = Related.objects.create()
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content = Content.objects.create(related_obj=related)
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Node.objects.create(content=content)
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# deleting the Related cascades to the Content cascades to the Node,
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# where the pre_delete signal should fire and prevent deletion.
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with self.assertRaises(ProtectedError):
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related.delete()
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def test_ticket_22982(self):
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place = Place.objects.create(name="My Place")
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self.assertIn("GenericRelatedObjectManager", str(place.links))
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def test_filter_on_related_proxy_model(self):
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place = Place.objects.create()
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Link.objects.create(content_object=place)
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self.assertEqual(Place.objects.get(link_proxy__object_id=place.id), place)
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def test_generic_reverse_relation_with_mti(self):
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"""
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Filtering with a reverse generic relation, where the GenericRelation
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comes from multi-table inheritance.
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"""
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place = Place.objects.create(name="Test Place")
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link = Link.objects.create(content_object=place)
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result = Link.objects.filter(places=place)
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self.assertCountEqual(result, [link])
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def test_generic_reverse_relation_with_abc(self):
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"""
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The reverse generic relation accessor (targets) is created if the
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GenericRelation comes from an abstract base model (HasLinks).
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"""
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thing = HasLinkThing.objects.create()
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link = Link.objects.create(content_object=thing)
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self.assertCountEqual(link.targets.all(), [thing])
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def test_generic_reverse_relation_exclude_filter(self):
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place1 = Place.objects.create(name="Test Place 1")
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place2 = Place.objects.create(name="Test Place 2")
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Link.objects.create(content_object=place1)
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link2 = Link.objects.create(content_object=place2)
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qs = Link.objects.filter(~Q(places__name="Test Place 1"))
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self.assertSequenceEqual(qs, [link2])
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qs = Link.objects.exclude(places__name="Test Place 1")
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self.assertSequenceEqual(qs, [link2])
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