Ember.Js Reflexive Association

Question

我正在尝试实施“追随者/追随者”关系。

应用程序/模板/ users.hbs ---------------------------

{{#each model as |user|}}
   ...
  <button {{action 'follow' user}}>Follow</button>
{{/each}}

应用程序/路由/ users.js ---------------------------

 follow(user){
   //currentUser is the one clicking on 'follow' button 
   //and it works.I can successfully alert it's properties.
   currentUser.get('followings').pushObject(user);
 },

应用程序/模型/ user.js的-----------------------

...
followings: DS.hasMany('user',{inverse: null}),
followers: DS.hasMany('user',{inverse: null}),

现在，此解决方案导致以下错误;

Uncaught TypeError: Cannot read the property 'modelName' of undefined at assertPolymorphicType.notifyRecordRelationshipAdded

Answer 1

试试这个：

followings: DS.hasMany('user', { inverse: 'followers' },
followers: DS.hasMany('user', { inverse: 'followings' },