null value in column "user_id" violates not-null constraint in post request , serialzier

Question

This is my views and serializer , when I post some data , getting null value in column "user_id" violates not-null constraint after passing user_id also same issue

views

serializer_class = subSerializer()

class subView():
    serializer = self.get_serializer(data=request.data)
    serializer.is_valid(raise_exception=True)
    self.perform_create(serializer)

serializer.py

class UserSerializer(serializers.ModelSerializer):
         ....................

class subSerialzier(serializers.ModelSerializer):
      user = UserSerializer(read_only=True)
       class Meta:
    model = RecipeSubmission
    fields = (
        'id',
        'user',
        'name',
         .......)