python - Django 休息框架忽略 has_object_permission

Question

我正在尝试限制用户对对象的访问。只有创建者才能修改对象。为此目的，就像他们在我写的教程中所说的那样

class IsOwnerOrReadOnly(permissions.BasePermission):
    def has_object_permission(self, request, view, obj):
        return False

并将其添加到 permission_classes。但是任何用户仍然可以修改任何对象。如果我添加方法

    def has_permission(self, request, view):
        return False

没有人能做任何事。因此，所有行为都由唯一的 has_permission 方法控制，该方法不提供任何方式来处理每个对象的权限。那我做错了什么吗？这是请求处理程序的代码

class ProblemsHandler(APIView):

    permission_classes = (
        IsOwnerOrReadOnly,
        permissions.IsAuthenticatedOrReadOnly,
    )

    def pre_save(self, request, problem):
        problem.author = request.user

    def get_object(self, request, pk, format):
        try:
            problem = ProblemsModel.objects.get(pk=pk)
            serializer = ProblemsSerializer(problem)
            return Response(serializer.data, status=HTTP_200_OK)
        except ProblemsModel.DoesNotExist:
            raise Http404

    def get_list(self, request, format):
        problems = ProblemsModel.objects.all()
        serializer = ProblemsSerializer(problems, many=True)
        return Response(serializer.data, status=HTTP_200_OK)

    def get(self, request, pk=None, format=None):
        if pk:
            return self.get_object(request, pk, format)
        else:
            return self.get_list(request, format)

    def post(self, request, format=None):
        serializer = ProblemsSerializer(data=request.DATA)
        if serializer.is_valid():
            self.pre_save(request, serializer.object)
            serializer.save()
            return Response(serializer.data, status=HTTP_201_CREATED)
        else:
            return Response(serializer.errors, status=HTTP_400_BAD_REQUEST)

    def put(self, request, pk, format=None):
        try:
            problem = ProblemsModel.objects.get(pk=pk)
            serializer = ProblemsSerializer(problem, data=request.DATA)
            if serializer.is_valid():
                self.pre_save(request, serializer.object)
                serializer.save()
                return Response(serializer.data, status=HTTP_200_OK)
            else:
                return Response(serializer.errors, status=HTTP_400_BAD_REQUEST)
        except ProblemsModel.DoesNotExist:
            raise Http404

    def delete(self, request, pk, format=None):
        try:
            problem = ProblemsModel.objects.get(pk=pk)
            problem.delete()
            return Response(status=HTTP_204_NO_CONTENT)
        except ProblemsModel.DoesNotExist:
            raise Http404

Answer 1

对象的权限检查由 DRF 在方法 APIView.check_object_permissions 中完成。

由于您不使用 GenericAPIView，因此您定义了自己的 get_object 方法，并且必须自己调用 check_object_permissions。由于您有点误用了 get_object，因此您必须检查 GET(单个)、PUT 和 DELETE

self.check_object_permissions(self.request, obj)

也许可以更好地了解 DRF Generic Views ，因为您的用例看起来很像它们。通常 get_object 应该只返回一个对象并检查权限。