创建带有belongsTo关系错误的记录-Ember.js

Question

给定两个模型：Message.js和User.js，尝试使用Ember.js创建记录时，我不断收到以下错误。 任何Ember.js向导都知道我的代码有什么问题吗？

//错误：断言失败：您只能向此关系添加“用户”记录

App.Message = DS.Model.extend({
 title: DS.attr(),
 body: DS.attr(),
 user: DS.belongsTo('user'),
});

App.User = DS.Model.extend({
  first_name: DS.attr(),
  last_name: DS.attr(),
  email: DS.attr(),
  password: DS.attr(),
  messages: DS.hasMany('message'),
});


App.NewMessageController = Ember.Controller.extend({
need: ['application'],
thisUserID: Ember.computed.alias('controllers.application.userID'),

actions: {
    save: function() {
        // Prints -> 'thisUserID' -- all is fine here
        console.log('The user id from new-letter is: '+this.get('thisUserID')); 

        var store = this.store;
        //Prints -> <DS.PromiseObject:ember433> -- Strange?
        console.log("Checking the store: "+store.find('user', this.get('thisUserID'))); 

        var newMessage = store.createRecord('message', {
            title: this.get('title'),
            body: this.get('body'),
        });
        newMessage.save();

        // Prints-> Error: Assertion Failed: You can only add a 'user' record to this relationship
        var user = store.find('user', this.get('thisUserID')).then(function(user) {
          newMessage.set('user', user);
        });
    }
}
});

Answer 1

我不是向导，但是您似乎正在尝试将用户记录设置为消息： newMessage.set('user', user);

相反，您应该添加以下消息： user.get('messages').addObject(newMessage);