重写创建函数后，如何在django中获取新创建对象的id？

Question

我有一个ModelViewSet，我想对新创建的对象执行更多操作。但是我无法在此处获取新创建的对象 ID。 super()后如何获取新创建的对象id？

    def create(self, request, *args, **kwargs):
        phone = request.data.get('student_phone_number')
        batch_id = request.data.get('batch_id')
        class_number = request.data.get('class_number')
        if not any([phone, batch_id, class_number]):
            return Response({"message": "Missing Params"}, status=status.HTTP_400_BAD_REQUEST)

        if self.queryset.filter(student_phone_number=phone, batch_id=batch_id, class_number=class_number,
                                is_cancelled=False).exists():
            return Response({"message": "Compensation class already booked"}, status=status.HTTP_400_BAD_REQUEST)
        
        super().create(request, *args, **kwargs)

Answer 1

您应该覆盖 perform_create 而不是在 ModelViewSet 上创建方法

def perform_create(self, serializer):
    phone_value = self.request.data['phone']
    batch_id_value = self.request.data['batch_id']
    class_number_value = self.request.data['class_number']

    // do your condition here

    instance = serializer.save(phone=phone_value, batch_id=batch_id_value, class_number=class_number_value)
    
    instance_id = instance.id

    // do whatever you want with instance_id 

    return Response({"message": "Data Has been saved", Id:instance_id }, status=status.HTTP_201_CREATED)

调用 serializer.save() 应该 return 刚刚创建的实例。

重写创建函数后，如何在django中获取新创建对象的id？

After overriding create function, how to the get the id of the newly created object in django?

django

django-rest-framework