Django Rest Framework将相关模型与当前用户相关联

Question

我首先解释一下我的问题的当前情况。

模型

例如，有5个模型：Community，User，Membership，Reservation，Item

class User(Model):
    name = CharField(max_length=50)
    communities = ManyToManyField('Community', through='Membership')


class Community(Model):
    name = CharField(max_length=50)


class Membership(Model):
    user = ForeignKey('User')
    community = ForeignKey('Community')


class Item(Model):
    name = CharField(max_length=50)


class Reservation(Model):
    item = ForeignKey('Item')
    membership = ForeignKey('Membership')

  

  
• Community是m：m User到Membership。
  
• Reservation为1：m Membership
  
• Item为1：m Reservation
  

ModelSerializer

class ReservationSerializer(ModelSerializer):
    class Meta:
        model = Reservation
        fields = ('membership', 'item')

问题

从User自动设置request.user值的最佳方法是什么，因此ReservationSerializer所需的属性只是community和item代替membership和item？

参考

• How to create a django User using DRF's ModelSerializer
• Return the current user with Django Rest Framework
• http://www.django-rest-framework.org/tutorial/4-authentication-and-permissions#associating-snippets-with-users
• Django Rest Framework ModelSerializer Set attribute on create
• Dynamically limiting queryset of related field
• djangorestframework: Filtering in a related field

Answer 1

序列化程序的作用是以清晰的方式表示信息，而不是操纵此类数据。您可能希望在视图上执行此操作：使用DRF上可用的通用ListCreateAPIView，您可以使用pre_save信号来存储该信息：

from rest_framework.generics import ListCreateAPIView

class ReservationView(ListCreateAPIView):
    def pre_save(self, obj):
        obj.membership.user = self.request.user