如何使用SwampDragon创建带外键的模型？

Question

我正在使用SwampDragon创建聊天演示，我不确定如何创建包含相关字段的模型。

使用下面的代码，每次在javascript中调用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,"Connection aborted"]。在python控制台上有 no 输出，可以解决这个错误。

任何人都可以帮助我了解如何使用Message的相关字段创建User吗？

型号：

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)

串行：

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', )

路线：

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)

javascipt的：

...
  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);
    });
  },
...

要求

• 的django == 1.7.6
• SwampDragon == 0.4.1.2
• SwampDragon-AUTH == 0.1.3

Answer 1

回答我自己的问题：这不像我预期的那样内置于框架中。您需要使用get_initial方法在路由器中实例化相关模型。然后将这些传递给序列化程序并正确创建Message模型。

路线

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()

的Javascript

...
  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);
    });
  },
...

串行

class MessageSerializer(ModelSerializer):
    user = UserSerializer

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