from django.db.models import Q from django.test import TestCase from .models import Issue, User, UnicodeReferenceModel class RelatedObjectTests(TestCase): def test_related_objects_have_name_attribute(self): for field_name in ('test_issue_client', 'test_issue_cc'): obj = User._meta.get_field(field_name) self.assertEqual(field_name, obj.field.related_query_name()) def test_m2m_and_m2o(self): r = User.objects.create(username="russell") g = User.objects.create(username="gustav") i1 = Issue(num=1) i1.client = r i1.save() i2 = Issue(num=2) i2.client = r i2.save() i2.cc.add(r) i3 = Issue(num=3) i3.client = g i3.save() i3.cc.add(r) self.assertQuerysetEqual( Issue.objects.filter(client=r.id), [ 1, 2, ], lambda i: i.num ) self.assertQuerysetEqual( Issue.objects.filter(client=g.id), [ 3, ], lambda i: i.num ) self.assertQuerysetEqual( Issue.objects.filter(cc__id__exact=g.id), [] ) self.assertQuerysetEqual( Issue.objects.filter(cc__id__exact=r.id), [ 2, 3, ], lambda i: i.num ) # These queries combine results from the m2m and the m2o relationships. # They're three ways of saying the same thing. self.assertQuerysetEqual( Issue.objects.filter(Q(cc__id__exact=r.id) | Q(client=r.id)), [ 1, 2, 3, ], lambda i: i.num ) self.assertQuerysetEqual( Issue.objects.filter(cc__id__exact=r.id) | Issue.objects.filter(client=r.id), [ 1, 2, 3, ], lambda i: i.num ) self.assertQuerysetEqual( Issue.objects.filter(Q(client=r.id) | Q(cc__id__exact=r.id)), [ 1, 2, 3, ], lambda i: i.num ) class RelatedObjectUnicodeTests(TestCase): def test_m2m_with_unicode_reference(self): """ Regression test for #6045: references to other models can be unicode strings, providing they are directly convertible to ASCII. """ m1 = UnicodeReferenceModel.objects.create() m2 = UnicodeReferenceModel.objects.create() m2.others.add(m1) # used to cause an error (see ticket #6045) m2.save() list(m2.others.all()) # Force retrieval.