Django - BaseSerializer.is_valid() 缺少 1 个必需的位置参数："self"

Question

我正在创建一个基本视图集类，并尝试在两个类中使用它。视图集有一个create方法，该方法使用get_serializer_class((来获取serializer并创建对象。但是is_valid((抛出错误

TypeError:BaseSerializer.is_valid((缺少1个必需的位置参数："self">

这是基类：

class BaseViewSet(BaseFilterViewSet):
permission_classes = [IsAuthenticated]

def create(self, request: Request, *args: Any, **kwargs: Any) -> Response:
context = super(BaseViewSet, self).get_serializer_context()
context.update({"request": request})

# serializer = super(BaseViewSet, self).get_serializer_class()
serializer = self.get_serializer_class()
serializer(data=request.data, context=context)
serializer.is_valid(raise_exception=True)
serializer.save(created_by=request.user)
return Response(serializer.data, status=HTTP_201_CREATED)

下面是使用此视图集并定义get_serializer_class方法的子类。

class ChildViewSet(BaseViewSet):
queryset = Child.objects.all().select_related("model2")
permission_classes = [IsAuthenticated]
def get_serializer_class(self) -> Type[BaseSerializer[_MT_co]]:
if self.action == "stock":
return StockSerializer
else:
return ChildSerializer

非常感谢您的投入和帮助。

Answer 1

您可以使用.get_serializer(…)^[drf-doc]：这将使用.get_serializer_class()^{[drf-doc][sup>中指定的序列化程序类自动创建序列化程序，该类具有已包含请求(以及view和format(的.get_serializer_context(…)方法调用/drf-doc]/sup>检索的上下文。因此，您可以将其实现为：}

class BaseViewSet(BaseFilterViewSet):
permission_classes = [IsAuthenticated]

def create(self, request: Request, *args: Any, **kwargs: Any) -> Response:
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
serializer.save(created_by=request.user)
return Response(serializer.data, status=HTTP_201_CREATED)