test_field.py 文件源码

def test_field_save_and_load(self):
        """Save and load a test model."""
        # pylint:disable=invalid-name
        t = SimpleType(a=1, b="? ?", c=datetime.datetime(1985, 10, 26, 9, 0))
        m = SimpleModel(test_field=t)
        m.save()  # pylint:disable=no-member

        # Retrieve from DB
        m = SimpleModel.objects.get(id=1)
        self.assertIsNotNone(m.test_field)
        self.assertIsInstance(m.test_field, SimpleType)
        self.assertEqual(m.test_field.a, 1)
        self.assertEqual(m.test_field.b, "? ?")
        self.assertEqual(m.test_field.c, datetime.datetime(1985, 10, 26, 9, 0))

        cursor = connection.connection.cursor()
        cursor.execute("SELECT (test_field).a FROM %s" % (
            SimpleModel._meta.db_table,))
        result, = cursor.fetchone()

        self.assertEqual(result, 1)

        cursor = connection.connection.cursor()
        cursor.execute("SELECT (test_field).b FROM %s" % (
            SimpleModel._meta.db_table,))
        result, = cursor.fetchone()

        self.assertEqual(result, "? ?")