javascript - EmberJS : Cannot read property 'typeKey' of undefined

Question

我想这个应该相当简单，但我还没有找到问题的根源，我还在学习 Ember-Data。

我有两个模型，它们之间具有 hasMany 关系:

App.User = DS.Model.extend({

  displayName: DS.attr('string'),
  email: DS.attr('string'),
  firstName: DS.attr('string'),
  lastName: DS.attr('string'),
  location: DS.attr('string'),
  messages: DS.hasMany('message')

});

App.Message = DS.Model.extend({

  user: DS.belongsTo('user'),
  createdAt: DS.attr('date'),
  updatedAt: DS.attr('date'),
  fullText: DS.attr('string'),
  subject: DS.attr('string'),
  recipients: DS.attr('string')

});

Ember-data 从服务器检索用户，输出如下:

{  
   "user":[  
      {  
         "id":"3",
         "firstName":"A",
         "lastName":"User",
         "location":"",
         "email":"a@user.com",
         "displayName":"auser",
         "messages":[  
            {  
               "id":"3",
               "user":"3",
               "createdAt":"2014-08-06 20:08:38",
               "fullText":"Here is some text",
               "recipients":"",
               "subject":"Message subject (may not be needed)",
               "updatedAt":"2014-08-06 20:08:38"
            }
         ]
      }
   ]
}

但是，当 Ember 尝试使用此响应填充商店时，我收到以下错误:

Error while loading route: TypeError: Cannot read property 'typeKey' of undefined
    at Ember.Object.extend.modelFor (http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:10667:22)
    at Ember.Object.extend.recordForId (http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:10112:21)
    at deserializeRecordId (http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:11116:27)
    at deserializeRecordIds (http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:11130:9)
    at http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:11095:11
    at http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:9317:20
    at http://www.musicicons.dev/assets/packages/ember/ember.js:3428:16
    at Object.OrderedSet.forEach (http://www.musicicons.dev/assets/packages/ember/ember.js:3271:10)
    at Object.Map.forEach (http://www.musicicons.dev/assets/packages/ember/ember.js:3426:10)
    at Function.Model.reopenClass.eachRelationship (http://www.musicicons.dev/assets/packages/ember-data/ember-data.js:9316:42)

如果我从我的 User 模型中删除或重命名 hasMany 关系，错误就会消失，所以我认为我的 JSON 构造不正确。

Answer 1

更新

Ember Data 现在支持它:Ember-data embedded records current state?

原创

默认情况下，Ember Data 不支持嵌入记录，这意味着您的 json 确实应该采用这种格式(如果您通过 id 3 查找用户):

{  
   "user":
   {  
      "id":"3",
      "firstName":"A",
      "lastName":"User",
      "location":"",
      "email":"a@user.com",
      "displayName":"auser",
      "messages": [3]
    },
    "messages":[  
     {  
       "id":"3",
       "user":"3",
       "createdAt":"2014-08-06 20:08:38",
       "fullText":"Here is some text",
       "recipients":"",
       "subject":"Message subject (may not be needed)",
       "updatedAt":"2014-08-06 20:08:38"
     }
    ]  
}

示例:http://emberjs.jsbin.com/OxIDiVU/918/edit

您可以在此处阅读有关嵌入式记录的信息:Ember-data embedded records current state?