Python 如何创建带有外键的模型？

我正在使用创建聊天演示，我不确定如何创建带有相关字段的模型

使用下面的代码，每次调用javascript中的

createMessage

函数时都会发生错误。我收到的唯一错误来自websocket输出：

c[3001，“连接中止”]

。python控制台上没有任何输出可以解释这个错误

有人能帮我理解如何创建一条

消息

，相关字段为

用户

型号： 序列化程序： 路线： Javascipt： 要求

• django==1.7.6
• 沼泽龙==0.4.1.2
• 沼泽龙认证==0.1.3

---

回答我自己的问题：这并不像我预期的那样内置到框架中。您需要在

get\u initial

方法中实例化路由器中的相关模型。然后，这些将被传递到序列化程序，并将正确创建

消息

模型
路线 Javascript 序列化程序

from django.contrib.auth.models import User
from django.db import models

from swampdragon.models import SelfPublishModel

from .serializers import MessageSerializer


class Message(SelfPublishModel, models.Model):
    serializer_class = MessageSerializer

    user = models.ForeignKey(User, related_name='messages')
    body = models.TextField(blank=True)

from swampdragon.serializers.model_serializer import ModelSerializer
from django.contrib.auth.models import User


class UserSerializer(ModelSerializer):

    class Meta:
        model = User
        publish_fields = ('id', 'username')
        update_fields = ('first_name', 'last_name', )


class MessageSerializer(ModelSerializer):
    user = UserSerializer

    class Meta:
        model = b'chat.Message'
        publish_fields = ('body', 'user', )
        update_fields = ('body', 'user', )

from swampdragon import route_handler
from swampdragon.route_handler import ModelRouter, BaseRouter

from .models import Message
from .serializers import MessageSerializer, UserSerializer


class MessageRouter(ModelRouter):
    route_name = 'message'
    serializer_class = MessageSerializer
    model = Message
    include_related = [UserSerializer, ]

    def get_object(self, **kwargs):
        return self.model.objects.get(pk=kwargs['id'])

    def get_query_set(self, **kwargs):
        return self.model.objects.all()

route_handler.register(MessageRouter)

...
  createMessage: function(message){
    var data = {
      user: 1,
      body: message
    };
    swampdragon.create('message', data, function (context, data) {
       console.log('MessageStore: onCreate success.', context, data);
    }, function (context, data) {
      console.log('MessageStore: onCreate failed.', context, data);
    });
  },
...

class MessageRouter(ModelRouter):
    route_name = 'message'
    serializer_class = MessageSerializer
    model = Message
    include_related = [UserSerializer, ]

    def get_initial(self, verb, **kwargs):
        user = User.objects.get(pk=kwargs['user_id'])
        return {'user': user}

    def get_object(self, **kwargs):
        return self.model.objects.get(pk=kwargs['id'])

    def get_query_set(self, **kwargs):
        return self.model.objects.all()

...
  createMessage: function(message){
    var data = {
      user_id: 1,
      body: message
    };
    swampdragon.create('message', data, function (context, data) {
       console.log('MessageStore: onCreate success.', context, data);
    }, function (context, data) {
      console.log('MessageStore: onCreate failed.', context, data);
    });
  },
...

class MessageSerializer(ModelSerializer):
    user = UserSerializer

    class Meta:
        model = b'chat.Message'
        publish_fields = ('body', 'user', )
        update_fields = ('body', )