test_serializers.py 文件源码

def test_composite_serializer_can_handle_errors_during_update(self):

        class EngineSerializer(CompositeSerializer):

            class Meta:
                composite = Vehicle.engine

            def set_cylinders(self, instance, field, value):
                assert False, 'Some error'

        data = {
            'cylinders': 2,
        }
        engine = Engine(4, 2345, 'apple', 'petrol')

        serializer = EngineSerializer(engine, data=data, partial=True)
        self.assertTrue(serializer.is_valid(), serializer.errors)

        with self.assertRaises(ValidationError):
            serializer.save()