test_querysets.py 文件源码

def test_order_by_fallback_chain(self):

        class TestObj(models.Model):
            title = models.CharField(max_length=100)
            i18n = TranslationField(fields=('title', ))

            class Meta:
                app_label = 'django-modeltrans_tests'

        translate_model(TestObj)

        with CreateTestModel(TestObj):
            TestObj.objects.bulk_create([
                TestObj(title='Falcon', title_nl='Valk'),
                TestObj(title='Frog', title_nl='Kikker', title_fr='Grenouilles', title_fy='Frosk'),
                TestObj(title='Fox', title_nl='Vos', title_fy='Foks'),
                TestObj(title='Gecko'),
                TestObj(title='Gerbil'),
                TestObj(title='Vulture', title_nl='Gier', title_fr='Vautour')
            ])

            # should use the 'default' fallback chain
            with override('nl'):
                qs = TestObj.objects.all().order_by('title_i18n')
                self.assertEquals(key(qs, 'title_i18n'), ['Gecko', 'Gerbil', 'Gier', 'Kikker', 'Valk', 'Vos'])

            # should use the 'fy' fallback chain
            with override('fy'):
                expected = ['Foks', 'Frosk', 'Gecko', 'Gerbil', 'Gier', 'Valk']
                qs = TestObj.objects.all().order_by('title_i18n')
                self.assertEquals(key(qs, 'title_i18n'), expected)

                expected.reverse()
                qs = TestObj.objects.all().order_by('-title_i18n')
                self.assertEquals(key(qs, 'title_i18n'), expected)

            # should use the 'default' fallback chain
            with override('fr'):
                qs = TestObj.objects.all().order_by('title_i18n')
                self.assertEquals(key(qs, 'title_i18n'), ['Falcon', 'Fox', 'Gecko', 'Gerbil', 'Grenouilles', 'Vautour'])