test_querysets.py 文件源码

def test_annotate_length(self):
        with override('nl'):
            qs = Blog.objects.annotate(l=models.functions.Length('title_i18n'))

            self.assertEquals(
                list(qs.values_list('l', flat=True)),
                list(map(len, ['VALK', 'VULTURE', 'BAT', 'DOLFIN', 'ZEBRA']))
            )