mirror of
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80aae83439
Black 23.1.0 is released which, as the first release of the year,
introduces the 2023 stable style. This incorporates most of last year's
preview style.
https://github.com/psf/black/releases/tag/23.1.0
Backport of 097e3a70c1 from main
690 lines
26 KiB
Python
690 lines
26 KiB
Python
import copy
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import datetime
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import pickle
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from operator import attrgetter
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from django.core.exceptions import FieldError
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from django.db import models
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from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
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from django.test.utils import isolate_apps
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from django.utils import translation
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from .models import (
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Article,
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ArticleIdea,
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ArticleTag,
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ArticleTranslation,
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Country,
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Friendship,
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Group,
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Membership,
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NewsArticle,
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Person,
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)
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# Note that these tests are testing internal implementation details.
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# ForeignObject is not part of public API.
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class MultiColumnFKTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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# Creating countries
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cls.usa = Country.objects.create(name="United States of America")
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cls.soviet_union = Country.objects.create(name="Soviet Union")
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# Creating People
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cls.bob = Person.objects.create(name="Bob", person_country=cls.usa)
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cls.jim = Person.objects.create(name="Jim", person_country=cls.usa)
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cls.george = Person.objects.create(name="George", person_country=cls.usa)
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cls.jane = Person.objects.create(name="Jane", person_country=cls.soviet_union)
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cls.mark = Person.objects.create(name="Mark", person_country=cls.soviet_union)
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cls.sam = Person.objects.create(name="Sam", person_country=cls.soviet_union)
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# Creating Groups
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cls.kgb = Group.objects.create(name="KGB", group_country=cls.soviet_union)
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cls.cia = Group.objects.create(name="CIA", group_country=cls.usa)
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cls.republican = Group.objects.create(name="Republican", group_country=cls.usa)
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cls.democrat = Group.objects.create(name="Democrat", group_country=cls.usa)
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def test_get_succeeds_on_multicolumn_match(self):
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# Membership objects have access to their related Person if both
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# country_ids match between them
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membership = Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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)
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person = membership.person
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self.assertEqual((person.id, person.name), (self.bob.id, "Bob"))
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def test_get_fails_on_multicolumn_mismatch(self):
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# Membership objects returns DoesNotExist error when there is no
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# Person with the same id and country_id
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membership = Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.jane.id,
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group_id=self.cia.id,
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)
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with self.assertRaises(Person.DoesNotExist):
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getattr(membership, "person")
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def test_reverse_query_returns_correct_result(self):
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# Creating a valid membership because it has the same country has the person
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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)
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# Creating an invalid membership because it has a different country has
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# the person.
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Membership.objects.create(
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membership_country_id=self.soviet_union.id,
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person_id=self.bob.id,
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group_id=self.republican.id,
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)
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with self.assertNumQueries(1):
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membership = self.bob.membership_set.get()
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self.assertEqual(membership.group_id, self.cia.id)
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self.assertIs(membership.person, self.bob)
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def test_query_filters_correctly(self):
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# Creating a to valid memberships
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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)
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.jim.id,
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group_id=self.cia.id,
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)
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# Creating an invalid membership
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Membership.objects.create(
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membership_country_id=self.soviet_union.id,
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person_id=self.george.id,
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group_id=self.cia.id,
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)
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self.assertQuerySetEqual(
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Membership.objects.filter(person__name__contains="o"),
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[self.bob.id],
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attrgetter("person_id"),
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)
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def test_reverse_query_filters_correctly(self):
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timemark = datetime.datetime.now(tz=datetime.timezone.utc).replace(tzinfo=None)
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timedelta = datetime.timedelta(days=1)
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# Creating a to valid memberships
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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date_joined=timemark - timedelta,
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)
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.jim.id,
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group_id=self.cia.id,
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date_joined=timemark + timedelta,
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)
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# Creating an invalid membership
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Membership.objects.create(
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membership_country_id=self.soviet_union.id,
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person_id=self.george.id,
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group_id=self.cia.id,
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date_joined=timemark + timedelta,
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)
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self.assertQuerySetEqual(
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Person.objects.filter(membership__date_joined__gte=timemark),
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["Jim"],
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attrgetter("name"),
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)
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def test_forward_in_lookup_filters_correctly(self):
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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)
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Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.jim.id,
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group_id=self.cia.id,
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)
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# Creating an invalid membership
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Membership.objects.create(
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membership_country_id=self.soviet_union.id,
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person_id=self.george.id,
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group_id=self.cia.id,
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)
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self.assertQuerySetEqual(
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Membership.objects.filter(person__in=[self.george, self.jim]),
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[
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self.jim.id,
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],
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attrgetter("person_id"),
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)
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self.assertQuerySetEqual(
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Membership.objects.filter(person__in=Person.objects.filter(name="Jim")),
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[
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self.jim.id,
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],
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attrgetter("person_id"),
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)
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def test_double_nested_query(self):
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m1 = Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.bob.id,
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group_id=self.cia.id,
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)
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m2 = Membership.objects.create(
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membership_country_id=self.usa.id,
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person_id=self.jim.id,
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group_id=self.cia.id,
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)
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Friendship.objects.create(
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from_friend_country_id=self.usa.id,
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from_friend_id=self.bob.id,
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to_friend_country_id=self.usa.id,
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to_friend_id=self.jim.id,
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)
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self.assertSequenceEqual(
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Membership.objects.filter(
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person__in=Person.objects.filter(
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from_friend__in=Friendship.objects.filter(
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to_friend__in=Person.objects.all()
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)
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)
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),
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[m1],
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)
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self.assertSequenceEqual(
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Membership.objects.exclude(
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person__in=Person.objects.filter(
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from_friend__in=Friendship.objects.filter(
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to_friend__in=Person.objects.all()
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)
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)
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),
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[m2],
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)
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def test_select_related_foreignkey_forward_works(self):
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.democrat
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)
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with self.assertNumQueries(1):
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people = [
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m.person
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for m in Membership.objects.select_related("person").order_by("pk")
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]
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normal_people = [m.person for m in Membership.objects.order_by("pk")]
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self.assertEqual(people, normal_people)
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def test_prefetch_foreignkey_forward_works(self):
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.democrat
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)
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with self.assertNumQueries(2):
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people = [
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m.person
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for m in Membership.objects.prefetch_related("person").order_by("pk")
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]
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normal_people = [m.person for m in Membership.objects.order_by("pk")]
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self.assertEqual(people, normal_people)
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def test_prefetch_foreignkey_reverse_works(self):
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.democrat
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)
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with self.assertNumQueries(2):
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membership_sets = [
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list(p.membership_set.all())
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for p in Person.objects.prefetch_related("membership_set").order_by(
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"pk"
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)
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]
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with self.assertNumQueries(7):
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normal_membership_sets = [
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list(p.membership_set.all()) for p in Person.objects.order_by("pk")
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]
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self.assertEqual(membership_sets, normal_membership_sets)
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def test_m2m_through_forward_returns_valid_members(self):
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# We start out by making sure that the Group 'CIA' has no members.
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self.assertQuerySetEqual(self.cia.members.all(), [])
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.cia
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)
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# Bob and Jim should be members of the CIA.
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self.assertQuerySetEqual(
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self.cia.members.all(), ["Bob", "Jim"], attrgetter("name")
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)
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def test_m2m_through_reverse_returns_valid_members(self):
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# We start out by making sure that Bob is in no groups.
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self.assertQuerySetEqual(self.bob.groups.all(), [])
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.republican
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)
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# Bob should be in the CIA and a Republican
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self.assertQuerySetEqual(
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self.bob.groups.all(), ["CIA", "Republican"], attrgetter("name")
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)
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def test_m2m_through_forward_ignores_invalid_members(self):
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# We start out by making sure that the Group 'CIA' has no members.
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self.assertQuerySetEqual(self.cia.members.all(), [])
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# Something adds jane to group CIA but Jane is in Soviet Union which
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# isn't CIA's country.
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Membership.objects.create(
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membership_country=self.usa, person=self.jane, group=self.cia
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)
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# There should still be no members in CIA
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self.assertQuerySetEqual(self.cia.members.all(), [])
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def test_m2m_through_reverse_ignores_invalid_members(self):
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# We start out by making sure that Jane has no groups.
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self.assertQuerySetEqual(self.jane.groups.all(), [])
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# Something adds jane to group CIA but Jane is in Soviet Union which
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# isn't CIA's country.
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Membership.objects.create(
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membership_country=self.usa, person=self.jane, group=self.cia
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)
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# Jane should still not be in any groups
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self.assertQuerySetEqual(self.jane.groups.all(), [])
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def test_m2m_through_on_self_works(self):
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self.assertQuerySetEqual(self.jane.friends.all(), [])
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Friendship.objects.create(
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from_friend_country=self.jane.person_country,
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from_friend=self.jane,
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to_friend_country=self.george.person_country,
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to_friend=self.george,
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)
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self.assertQuerySetEqual(
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self.jane.friends.all(), ["George"], attrgetter("name")
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)
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def test_m2m_through_on_self_ignores_mismatch_columns(self):
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self.assertQuerySetEqual(self.jane.friends.all(), [])
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# Note that we use ids instead of instances. This is because instances
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# on ForeignObject properties will set all related field off of the
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# given instance.
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Friendship.objects.create(
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from_friend_id=self.jane.id,
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to_friend_id=self.george.id,
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to_friend_country_id=self.jane.person_country_id,
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from_friend_country_id=self.george.person_country_id,
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)
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self.assertQuerySetEqual(self.jane.friends.all(), [])
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def test_prefetch_related_m2m_forward_works(self):
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.democrat
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)
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with self.assertNumQueries(2):
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members_lists = [
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list(g.members.all()) for g in Group.objects.prefetch_related("members")
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]
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normal_members_lists = [list(g.members.all()) for g in Group.objects.all()]
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self.assertEqual(members_lists, normal_members_lists)
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def test_prefetch_related_m2m_reverse_works(self):
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Membership.objects.create(
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membership_country=self.usa, person=self.bob, group=self.cia
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)
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Membership.objects.create(
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membership_country=self.usa, person=self.jim, group=self.democrat
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)
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with self.assertNumQueries(2):
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groups_lists = [
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list(p.groups.all()) for p in Person.objects.prefetch_related("groups")
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]
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normal_groups_lists = [list(p.groups.all()) for p in Person.objects.all()]
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self.assertEqual(groups_lists, normal_groups_lists)
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@translation.override("fi")
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def test_translations(self):
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a1 = Article.objects.create(pub_date=datetime.date.today())
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at1_fi = ArticleTranslation(
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article=a1, lang="fi", title="Otsikko", body="Diipadaapa"
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)
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at1_fi.save()
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at2_en = ArticleTranslation(
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article=a1, lang="en", title="Title", body="Lalalalala"
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)
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at2_en.save()
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self.assertEqual(Article.objects.get(pk=a1.pk).active_translation, at1_fi)
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with self.assertNumQueries(1):
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fetched = Article.objects.select_related("active_translation").get(
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active_translation__title="Otsikko"
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)
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self.assertEqual(fetched.active_translation.title, "Otsikko")
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a2 = Article.objects.create(pub_date=datetime.date.today())
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at2_fi = ArticleTranslation(
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article=a2, lang="fi", title="Atsikko", body="Diipadaapa", abstract="dipad"
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)
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at2_fi.save()
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a3 = Article.objects.create(pub_date=datetime.date.today())
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at3_en = ArticleTranslation(
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article=a3, lang="en", title="A title", body="lalalalala", abstract="lala"
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)
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at3_en.save()
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# Test model initialization with active_translation field.
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a3 = Article(id=a3.id, pub_date=a3.pub_date, active_translation=at3_en)
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a3.save()
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self.assertEqual(
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list(Article.objects.filter(active_translation__abstract=None)), [a1, a3]
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)
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self.assertEqual(
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list(
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Article.objects.filter(
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active_translation__abstract=None,
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active_translation__pk__isnull=False,
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)
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),
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[a1],
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)
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with translation.override("en"):
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self.assertEqual(
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list(Article.objects.filter(active_translation__abstract=None)),
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[a1, a2],
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)
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def test_foreign_key_raises_informative_does_not_exist(self):
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referrer = ArticleTranslation()
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with self.assertRaisesMessage(
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Article.DoesNotExist, "ArticleTranslation has no article"
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):
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referrer.article
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def test_foreign_key_related_query_name(self):
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a1 = Article.objects.create(pub_date=datetime.date.today())
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ArticleTag.objects.create(article=a1, name="foo")
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self.assertEqual(Article.objects.filter(tag__name="foo").count(), 1)
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self.assertEqual(Article.objects.filter(tag__name="bar").count(), 0)
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msg = (
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"Cannot resolve keyword 'tags' into field. Choices are: "
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"active_translation, active_translation_q, articletranslation, "
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"id, idea_things, newsarticle, pub_date, tag"
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)
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with self.assertRaisesMessage(FieldError, msg):
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Article.objects.filter(tags__name="foo")
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def test_many_to_many_related_query_name(self):
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a1 = Article.objects.create(pub_date=datetime.date.today())
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i1 = ArticleIdea.objects.create(name="idea1")
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a1.ideas.add(i1)
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self.assertEqual(Article.objects.filter(idea_things__name="idea1").count(), 1)
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self.assertEqual(Article.objects.filter(idea_things__name="idea2").count(), 0)
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msg = (
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"Cannot resolve keyword 'ideas' into field. Choices are: "
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"active_translation, active_translation_q, articletranslation, "
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"id, idea_things, newsarticle, pub_date, tag"
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)
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with self.assertRaisesMessage(FieldError, msg):
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Article.objects.filter(ideas__name="idea1")
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|
|
@translation.override("fi")
|
|
def test_inheritance(self):
|
|
na = NewsArticle.objects.create(pub_date=datetime.date.today())
|
|
ArticleTranslation.objects.create(
|
|
article=na, lang="fi", title="foo", body="bar"
|
|
)
|
|
self.assertSequenceEqual(
|
|
NewsArticle.objects.select_related("active_translation"), [na]
|
|
)
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(
|
|
NewsArticle.objects.select_related("active_translation")[
|
|
0
|
|
].active_translation.title,
|
|
"foo",
|
|
)
|
|
|
|
@skipUnlessDBFeature("has_bulk_insert")
|
|
def test_batch_create_foreign_object(self):
|
|
objs = [
|
|
Person(name="abcd_%s" % i, person_country=self.usa) for i in range(0, 5)
|
|
]
|
|
Person.objects.bulk_create(objs, 10)
|
|
|
|
def test_isnull_lookup(self):
|
|
m1 = Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group_id=None
|
|
)
|
|
m2 = Membership.objects.create(
|
|
membership_country=self.usa, person=self.bob, group=self.cia
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.filter(group__isnull=True),
|
|
[m1],
|
|
)
|
|
self.assertSequenceEqual(
|
|
Membership.objects.filter(group__isnull=False),
|
|
[m2],
|
|
)
|
|
|
|
|
|
class TestModelCheckTests(SimpleTestCase):
|
|
@isolate_apps("foreign_object")
|
|
def test_check_composite_foreign_object(self):
|
|
class Parent(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
|
|
class Meta:
|
|
unique_together = (("a", "b"),)
|
|
|
|
class Child(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
value = models.CharField(max_length=255)
|
|
parent = models.ForeignObject(
|
|
Parent,
|
|
on_delete=models.SET_NULL,
|
|
from_fields=("a", "b"),
|
|
to_fields=("a", "b"),
|
|
related_name="children",
|
|
)
|
|
|
|
self.assertEqual(Child._meta.get_field("parent").check(from_model=Child), [])
|
|
|
|
@isolate_apps("foreign_object")
|
|
def test_check_subset_composite_foreign_object(self):
|
|
class Parent(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
c = models.PositiveIntegerField()
|
|
|
|
class Meta:
|
|
unique_together = (("a", "b"),)
|
|
|
|
class Child(models.Model):
|
|
a = models.PositiveIntegerField()
|
|
b = models.PositiveIntegerField()
|
|
c = models.PositiveIntegerField()
|
|
d = models.CharField(max_length=255)
|
|
parent = models.ForeignObject(
|
|
Parent,
|
|
on_delete=models.SET_NULL,
|
|
from_fields=("a", "b", "c"),
|
|
to_fields=("a", "b", "c"),
|
|
related_name="children",
|
|
)
|
|
|
|
self.assertEqual(Child._meta.get_field("parent").check(from_model=Child), [])
|
|
|
|
|
|
class TestExtraJoinFilterQ(TestCase):
|
|
@translation.override("fi")
|
|
def test_extra_join_filter_q(self):
|
|
a = Article.objects.create(pub_date=datetime.datetime.today())
|
|
ArticleTranslation.objects.create(
|
|
article=a, lang="fi", title="title", body="body"
|
|
)
|
|
qs = Article.objects.all()
|
|
with self.assertNumQueries(2):
|
|
self.assertEqual(qs[0].active_translation_q.title, "title")
|
|
qs = qs.select_related("active_translation_q")
|
|
with self.assertNumQueries(1):
|
|
self.assertEqual(qs[0].active_translation_q.title, "title")
|
|
|
|
|
|
class TestCachedPathInfo(TestCase):
|
|
def test_equality(self):
|
|
"""
|
|
The path_infos and reverse_path_infos attributes are equivalent to
|
|
calling the get_<method>() with no arguments.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
self.assertEqual(
|
|
foreign_object.path_infos,
|
|
foreign_object.get_path_info(),
|
|
)
|
|
self.assertEqual(
|
|
foreign_object.reverse_path_infos,
|
|
foreign_object.get_reverse_path_info(),
|
|
)
|
|
|
|
def test_copy_removes_direct_cached_values(self):
|
|
"""
|
|
Shallow copying a ForeignObject (or a ForeignObjectRel) removes the
|
|
object's direct cached PathInfo values.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObject's __dict__.
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
# The ForeignObjectRel doesn't have reverse_path_infos.
|
|
foreign_object.remote_field.path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
self.assertIn("path_infos", foreign_object.remote_field.__dict__)
|
|
# Cached value is removed via __getstate__() on ForeignObjectRel
|
|
# because no __copy__() method exists, so __reduce_ex__() is used.
|
|
remote_field_copy = copy.copy(foreign_object.remote_field)
|
|
self.assertNotIn("path_infos", remote_field_copy.__dict__)
|
|
# Cached values are removed via __copy__() on ForeignObject for
|
|
# consistency of behavior.
|
|
foreign_object_copy = copy.copy(foreign_object)
|
|
self.assertNotIn("path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("reverse_path_infos", foreign_object_copy.__dict__)
|
|
# ForeignObjectRel's remains because it's part of a shallow copy.
|
|
self.assertIn("path_infos", foreign_object_copy.remote_field.__dict__)
|
|
|
|
def test_deepcopy_removes_cached_values(self):
|
|
"""
|
|
Deep copying a ForeignObject removes the object's cached PathInfo
|
|
values, including those of the related ForeignObjectRel.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObject's __dict__.
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
# The ForeignObjectRel doesn't have reverse_path_infos.
|
|
foreign_object.remote_field.path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
self.assertIn("path_infos", foreign_object.remote_field.__dict__)
|
|
# Cached value is removed via __getstate__() on ForeignObjectRel
|
|
# because no __deepcopy__() method exists, so __reduce_ex__() is used.
|
|
remote_field_copy = copy.deepcopy(foreign_object.remote_field)
|
|
self.assertNotIn("path_infos", remote_field_copy.__dict__)
|
|
# Field.__deepcopy__() internally uses __copy__() on both the
|
|
# ForeignObject and ForeignObjectRel, so all cached values are removed.
|
|
foreign_object_copy = copy.deepcopy(foreign_object)
|
|
self.assertNotIn("path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("reverse_path_infos", foreign_object_copy.__dict__)
|
|
self.assertNotIn("path_infos", foreign_object_copy.remote_field.__dict__)
|
|
|
|
def test_pickling_foreignobjectrel(self):
|
|
"""
|
|
Pickling a ForeignObjectRel removes the path_infos attribute.
|
|
|
|
ForeignObjectRel implements __getstate__(), so copy and pickle modules
|
|
both use that, but ForeignObject implements __reduce__() and __copy__()
|
|
separately, so doesn't share the same behaviour.
|
|
"""
|
|
foreign_object_rel = Membership._meta.get_field("person").remote_field
|
|
# Trigger storage of cached_property into ForeignObjectRel's __dict__.
|
|
foreign_object_rel.path_infos
|
|
self.assertIn("path_infos", foreign_object_rel.__dict__)
|
|
foreign_object_rel_restored = pickle.loads(pickle.dumps(foreign_object_rel))
|
|
self.assertNotIn("path_infos", foreign_object_rel_restored.__dict__)
|
|
|
|
def test_pickling_foreignobject(self):
|
|
"""
|
|
Pickling a ForeignObject does not remove the cached PathInfo values.
|
|
|
|
ForeignObject will always keep the path_infos and reverse_path_infos
|
|
attributes within the same process, because of the way
|
|
Field.__reduce__() is used for restoring values.
|
|
"""
|
|
foreign_object = Membership._meta.get_field("person")
|
|
# Trigger storage of cached_property into ForeignObjectRel's __dict__
|
|
foreign_object.path_infos
|
|
foreign_object.reverse_path_infos
|
|
self.assertIn("path_infos", foreign_object.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object.__dict__)
|
|
foreign_object_restored = pickle.loads(pickle.dumps(foreign_object))
|
|
self.assertIn("path_infos", foreign_object_restored.__dict__)
|
|
self.assertIn("reverse_path_infos", foreign_object_restored.__dict__)
|