Django

Question

我正在创建一个基本视图集 class 并尝试在两个 class 中使用它。视图集有一个创建方法，它使用 get_serializer_class() 来获取序列化器并创建对象。但是 is_valid() 抛出错误

TypeError: BaseSerializer.is_valid() missing 1 required positional argument: 'self'

这里是基地 class:

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)

这是使用此视图集并定义 get_serializer_class 方法的子 class。

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

您可以使用已包含请求的 .get_serializer(…) ^[drf-doc]: this will automatically create the serializer with the serializer class that is specified in the .get_serializer_class() ^[drf-doc] with the context retrieved by the .get_serializer_context(…) method call ^[drf-doc]（以及 view 和 format）。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.<strong>get_serializer(</strong>data=request.data<strong>)</strong>
        serializer.is_valid(raise_exception=True)
        serializer.save(created_by=request.user)
        return Response(serializer.data, status=HTTP_201_CREATED)

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

Django - BaseSerializer.is_valid() missing 1 required positional argument: 'self'

django-serializer

django-rest-framework

django-rest-viewsets