import datetime from operator import attrgetter from django.apps.registry import Apps from django.core.exceptions import FieldError from django.db import models from django.db.models.fields.related import ForeignObject from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature from django.utils import translation from .models import ( Article, ArticleIdea, ArticleTag, ArticleTranslation, Country, Friendship, Group, Membership, NewsArticle, Person, ) # Note that these tests are testing internal implementation details. # ForeignObject is not part of public API. class MultiColumnFKTests(TestCase): def setUp(self): # Creating countries self.usa = Country.objects.create(name="United States of America") self.soviet_union = Country.objects.create(name="Soviet Union") Person() # Creating People self.bob = Person() self.bob.name = 'Bob' self.bob.person_country = self.usa self.bob.save() self.jim = Person.objects.create(name='Jim', person_country=self.usa) self.george = Person.objects.create(name='George', person_country=self.usa) self.jane = Person.objects.create(name='Jane', person_country=self.soviet_union) self.mark = Person.objects.create(name='Mark', person_country=self.soviet_union) self.sam = Person.objects.create(name='Sam', person_country=self.soviet_union) # Creating Groups self.kgb = Group.objects.create(name='KGB', group_country=self.soviet_union) self.cia = Group.objects.create(name='CIA', group_country=self.usa) self.republican = Group.objects.create(name='Republican', group_country=self.usa) self.democrat = Group.objects.create(name='Democrat', group_country=self.usa) def test_get_succeeds_on_multicolumn_match(self): # Membership objects have access to their related Person if both # country_ids match between them membership = Membership.objects.create( membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id) person = membership.person self.assertEqual((person.id, person.name), (self.bob.id, "Bob")) def test_get_fails_on_multicolumn_mismatch(self): # Membership objects returns DoesNotExist error when the there is no # Person with the same id and country_id membership = Membership.objects.create( membership_country_id=self.usa.id, person_id=self.jane.id, group_id=self.cia.id) self.assertRaises(Person.DoesNotExist, getattr, membership, 'person') def test_reverse_query_returns_correct_result(self): # Creating a valid membership because it has the same country has the person Membership.objects.create( membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id) # Creating an invalid membership because it has a different country has the person Membership.objects.create( membership_country_id=self.soviet_union.id, person_id=self.bob.id, group_id=self.republican.id) self.assertQuerysetEqual( self.bob.membership_set.all(), [ self.cia.id ], attrgetter("group_id") ) def test_query_filters_correctly(self): # Creating a to valid memberships Membership.objects.create( membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id) Membership.objects.create( membership_country_id=self.usa.id, person_id=self.jim.id, group_id=self.cia.id) # Creating an invalid membership Membership.objects.create(membership_country_id=self.soviet_union.id, person_id=self.george.id, group_id=self.cia.id) self.assertQuerysetEqual( Membership.objects.filter(person__name__contains='o'), [ self.bob.id ], attrgetter("person_id") ) def test_reverse_query_filters_correctly(self): timemark = datetime.datetime.utcnow() timedelta = datetime.timedelta(days=1) # Creating a to valid memberships Membership.objects.create( membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id, date_joined=timemark - timedelta) Membership.objects.create( membership_country_id=self.usa.id, person_id=self.jim.id, group_id=self.cia.id, date_joined=timemark + timedelta) # Creating an invalid membership Membership.objects.create( membership_country_id=self.soviet_union.id, person_id=self.george.id, group_id=self.cia.id, date_joined=timemark + timedelta) self.assertQuerysetEqual( Person.objects.filter(membership__date_joined__gte=timemark), [ 'Jim' ], attrgetter('name') ) def test_forward_in_lookup_filters_correctly(self): Membership.objects.create(membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id) Membership.objects.create(membership_country_id=self.usa.id, person_id=self.jim.id, group_id=self.cia.id) # Creating an invalid membership Membership.objects.create( membership_country_id=self.soviet_union.id, person_id=self.george.id, group_id=self.cia.id) self.assertQuerysetEqual( Membership.objects.filter(person__in=[self.george, self.jim]), [ self.jim.id, ], attrgetter('person_id') ) self.assertQuerysetEqual( Membership.objects.filter(person__in=Person.objects.filter(name='Jim')), [ self.jim.id, ], attrgetter('person_id') ) def test_double_nested_query(self): m1 = Membership.objects.create(membership_country_id=self.usa.id, person_id=self.bob.id, group_id=self.cia.id) m2 = Membership.objects.create(membership_country_id=self.usa.id, person_id=self.jim.id, group_id=self.cia.id) Friendship.objects.create(from_friend_country_id=self.usa.id, from_friend_id=self.bob.id, to_friend_country_id=self.usa.id, to_friend_id=self.jim.id) self.assertQuerysetEqual(Membership.objects.filter( person__in=Person.objects.filter( from_friend__in=Friendship.objects.filter( to_friend__in=Person.objects.all()))), [m1], lambda x: x) self.assertQuerysetEqual(Membership.objects.exclude( person__in=Person.objects.filter( from_friend__in=Friendship.objects.filter( to_friend__in=Person.objects.all()))), [m2], lambda x: x) def test_select_related_foreignkey_forward_works(self): Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.democrat) with self.assertNumQueries(1): people = [m.person for m in Membership.objects.select_related('person').order_by('pk')] normal_people = [m.person for m in Membership.objects.all().order_by('pk')] self.assertEqual(people, normal_people) def test_prefetch_foreignkey_forward_works(self): Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.democrat) with self.assertNumQueries(2): people = [ m.person for m in Membership.objects.prefetch_related('person').order_by('pk')] normal_people = [m.person for m in Membership.objects.order_by('pk')] self.assertEqual(people, normal_people) def test_prefetch_foreignkey_reverse_works(self): Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.democrat) with self.assertNumQueries(2): membership_sets = [ list(p.membership_set.all()) for p in Person.objects.prefetch_related('membership_set').order_by('pk')] normal_membership_sets = [list(p.membership_set.all()) for p in Person.objects.order_by('pk')] self.assertEqual(membership_sets, normal_membership_sets) def test_m2m_through_forward_returns_valid_members(self): # We start out by making sure that the Group 'CIA' has no members. self.assertQuerysetEqual( self.cia.members.all(), [] ) Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.cia) # Let's check to make sure that it worked. Bob and Jim should be members of the CIA. self.assertQuerysetEqual( self.cia.members.all(), [ 'Bob', 'Jim' ], attrgetter("name") ) def test_m2m_through_reverse_returns_valid_members(self): # We start out by making sure that Bob is in no groups. self.assertQuerysetEqual( self.bob.groups.all(), [] ) Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.republican) # Bob should be in the CIA and a Republican self.assertQuerysetEqual( self.bob.groups.all(), [ 'CIA', 'Republican' ], attrgetter("name") ) def test_m2m_through_forward_ignores_invalid_members(self): # We start out by making sure that the Group 'CIA' has no members. self.assertQuerysetEqual( self.cia.members.all(), [] ) # Something adds jane to group CIA but Jane is in Soviet Union which isn't CIA's country Membership.objects.create(membership_country=self.usa, person=self.jane, group=self.cia) # There should still be no members in CIA self.assertQuerysetEqual( self.cia.members.all(), [] ) def test_m2m_through_reverse_ignores_invalid_members(self): # We start out by making sure that Jane has no groups. self.assertQuerysetEqual( self.jane.groups.all(), [] ) # Something adds jane to group CIA but Jane is in Soviet Union which isn't CIA's country Membership.objects.create(membership_country=self.usa, person=self.jane, group=self.cia) # Jane should still not be in any groups self.assertQuerysetEqual( self.jane.groups.all(), [] ) def test_m2m_through_on_self_works(self): self.assertQuerysetEqual( self.jane.friends.all(), [] ) Friendship.objects.create( from_friend_country=self.jane.person_country, from_friend=self.jane, to_friend_country=self.george.person_country, to_friend=self.george) self.assertQuerysetEqual( self.jane.friends.all(), ['George'], attrgetter("name") ) def test_m2m_through_on_self_ignores_mismatch_columns(self): self.assertQuerysetEqual(self.jane.friends.all(), []) # Note that we use ids instead of instances. This is because instances on ForeignObject # properties will set all related field off of the given instance Friendship.objects.create( from_friend_id=self.jane.id, to_friend_id=self.george.id, to_friend_country_id=self.jane.person_country_id, from_friend_country_id=self.george.person_country_id) self.assertQuerysetEqual(self.jane.friends.all(), []) def test_prefetch_related_m2m_forward_works(self): Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.democrat) with self.assertNumQueries(2): members_lists = [list(g.members.all()) for g in Group.objects.prefetch_related('members')] normal_members_lists = [list(g.members.all()) for g in Group.objects.all()] self.assertEqual(members_lists, normal_members_lists) def test_prefetch_related_m2m_reverse_works(self): Membership.objects.create(membership_country=self.usa, person=self.bob, group=self.cia) Membership.objects.create(membership_country=self.usa, person=self.jim, group=self.democrat) with self.assertNumQueries(2): groups_lists = [list(p.groups.all()) for p in Person.objects.prefetch_related('groups')] normal_groups_lists = [list(p.groups.all()) for p in Person.objects.all()] self.assertEqual(groups_lists, normal_groups_lists) @translation.override('fi') def test_translations(self): a1 = Article.objects.create(pub_date=datetime.date.today()) at1_fi = ArticleTranslation(article=a1, lang='fi', title='Otsikko', body='Diipadaapa') at1_fi.save() at2_en = ArticleTranslation(article=a1, lang='en', title='Title', body='Lalalalala') at2_en.save() self.assertEqual(Article.objects.get(pk=a1.pk).active_translation, at1_fi) with self.assertNumQueries(1): fetched = Article.objects.select_related('active_translation').get( active_translation__title='Otsikko') self.assertEqual(fetched.active_translation.title, 'Otsikko') a2 = Article.objects.create(pub_date=datetime.date.today()) at2_fi = ArticleTranslation(article=a2, lang='fi', title='Atsikko', body='Diipadaapa', abstract='dipad') at2_fi.save() a3 = Article.objects.create(pub_date=datetime.date.today()) at3_en = ArticleTranslation(article=a3, lang='en', title='A title', body='lalalalala', abstract='lala') at3_en.save() # Test model initialization with active_translation field. a3 = Article(id=a3.id, pub_date=a3.pub_date, active_translation=at3_en) a3.save() self.assertEqual( list(Article.objects.filter(active_translation__abstract=None)), [a1, a3]) self.assertEqual( list(Article.objects.filter(active_translation__abstract=None, active_translation__pk__isnull=False)), [a1]) with translation.override('en'): self.assertEqual( list(Article.objects.filter(active_translation__abstract=None)), [a1, a2]) def test_foreign_key_raises_informative_does_not_exist(self): referrer = ArticleTranslation() with self.assertRaisesMessage(Article.DoesNotExist, 'ArticleTranslation has no article'): referrer.article def test_foreign_key_related_query_name(self): a1 = Article.objects.create(pub_date=datetime.date.today()) ArticleTag.objects.create(article=a1, name="foo") self.assertEqual(Article.objects.filter(tag__name="foo").count(), 1) self.assertEqual(Article.objects.filter(tag__name="bar").count(), 0) with self.assertRaises(FieldError): Article.objects.filter(tags__name="foo") def test_many_to_many_related_query_name(self): a1 = Article.objects.create(pub_date=datetime.date.today()) i1 = ArticleIdea.objects.create(name="idea1") a1.ideas.add(i1) self.assertEqual(Article.objects.filter(idea_things__name="idea1").count(), 1) self.assertEqual(Article.objects.filter(idea_things__name="idea2").count(), 0) with self.assertRaises(FieldError): Article.objects.filter(ideas__name="idea1") @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.assertQuerysetEqual( NewsArticle.objects.select_related('active_translation'), [na], lambda x: x ) 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): """ See: https://code.djangoproject.com/ticket/21566 """ objs = [Person(name="abcd_%s" % i, person_country=self.usa) for i in range(0, 5)] Person.objects.bulk_create(objs, 10) class TestModelCheckTests(SimpleTestCase): def test_check_composite_foreign_object(self): test_apps = Apps(['foreign_object']) class Parent(models.Model): a = models.PositiveIntegerField() b = models.PositiveIntegerField() class Meta: apps = test_apps unique_together = (('a', 'b'),) class Child(models.Model): a = models.PositiveIntegerField() b = models.PositiveIntegerField() value = models.CharField(max_length=255) parent = ForeignObject( Parent, on_delete=models.SET_NULL, from_fields=('a', 'b'), to_fields=('a', 'b'), related_name='children', ) class Meta: apps = test_apps self.assertEqual(Child._meta.get_field('parent').check(from_model=Child), []) def test_check_subset_composite_foreign_object(self): test_apps = Apps(['foreign_object']) class Parent(models.Model): a = models.PositiveIntegerField() b = models.PositiveIntegerField() c = models.PositiveIntegerField() class Meta: apps = test_apps unique_together = (('a', 'b'),) class Child(models.Model): a = models.PositiveIntegerField() b = models.PositiveIntegerField() c = models.PositiveIntegerField() d = models.CharField(max_length=255) parent = ForeignObject( Parent, on_delete=models.SET_NULL, from_fields=('a', 'b', 'c'), to_fields=('a', 'b', 'c'), related_name='children', ) class Meta: apps = test_apps self.assertEqual(Child._meta.get_field('parent').check(from_model=Child), [])