ember.js - Ember 数据 : Uncaught TypeError: Cannot call method 'modelFor' of undefined

Question

我正在尝试使用 ember 数据定义我的模型，但出于某种原因，一旦我添加了一些
hasMany 或 belongsTo 关系，我收到错误“Uncaught TypeError: Cannot call method 'modelFor' of undefined”

我做错了什么？

App.User = DS.Model.extend({
  username: DS.attr('string'),
  facebook_id: DS.attr('string'),
  staff: DS.attr('boolean', {defaultValue: false}),
  createdAt: DS.attr('date'),
  posts: DS.hasMany('post', {async: true}),
  comments: DS.hasMany('comment', {async: true)
})

App.Post = DS.Model.extend({
  title: DS.attr('string'),
  image: DS.attr('string'),
  track: DS.attr('string'),
  createdAt: DS.attr('date'),
  user: DS.belongsTo('user'),
  comments: DS.hasMany('comment', {async: true})
})

App.Comment = DS.Model.extend({
  user: DS.belongsTo('user'),
  post: DS.belongsTo('post'),
  track: DS.attr('string'),
  createdAt: DS.attr('date')
})

Answer 1

通过在关系中指定应用程序名称来解决它，例如而不是 hasMany('comment') 我使用 hasMany('App.Comment')。不确定发生了什么，因为文档中显示的是前者。

App.User = DS.Model.extend({
  username: DS.attr('string'),
  facebook_id: DS.attr('string'),
  staff: DS.attr('boolean', {defaultValue: false}),
  createdAt: DS.attr('date'),
  posts: DS.hasMany('App.Post', {async: true}),
  comments: DS.hasMany('App.Comment', {async: true)
})

App.Post = DS.Model.extend({
  title: DS.attr('string'),
  image: DS.attr('string'),
  track: DS.attr('string'),
  createdAt: DS.attr('date'),
  user: DS.belongsTo('App.User'),
  comments: DS.hasMany('App.Comment', {async: true})
})

App.Comment = DS.Model.extend({
  user: DS.belongsTo('App.User'),
  post: DS.belongsTo('App.Post'),
  track: DS.attr('string'),
  createdAt: DS.attr('date')
})