这是我的准则。

class MyViewSet(ModelViewSet):
    serializer_class = MySerializer
    queryset = MyClass.objects.all()

    def get_serializer_class(self):
        if request.user.is_superuser:
            return self.serializer_class
        else:
            return OtherSerializer

    def perform_create(self, serializer):
        if request.user.is_superuser:
            if serializer.is_valid(): 
                serializer.save(organization=self.request.user.organization) 

        else:
            employee = Employee.objects.get(user=self.request.user)
            serializer.save(employee=employee, organization=self.request.user.organization)

这是我的序列化器：

class MySerializer(serializers.ModelSerializer):
    class Meta:
        model = models.MyClass

        def validate(self, data):  
            employee = data.get('employee')
            members = Team.objects.get(id=team.id.members.all())
            if employee not in members:
                raise serializers.ValidationError('Invalid')
            return data

问题是，当我在ViewSet的perform_create（）中调用自定义验证函数时，它没有被调用。
问题出在哪里？