Question

我正在构建一个适配器来包装Keen.io API，到目前为止，我已经能够成功加载项目资源，但是返回的对象如下所示：

{
  partners_url: "/3.0/projects/<ID>/partners",
  name: "Project Name",
  url: "/3.0/projects/<ID>",
  saved_queries: [ ],
  events_url: "/3.0/projects/<ID>/events",
  id: "<ID>",
  organization_id: "<ORG ID>",
  queries_url: "/3.0/projects/<ID>/queries",
  api_key: "<API KEY>",
  events: [
    {
      url: "/3.0/projects/<ID>/events/user_signup",
      name: "user_signup"
    },
    {
      url: "/3.0/projects/<ID>/events/user_converted",
      name: "user_converted"
    },
    {
      url: "/3.0/projects/<ID>/events/user_created_project",
      name: "user_created_project"
    }
  ]
}

排除很多错误，Ember使用name映射id和RESTSerializer属性没有问题，但如果我为events添加Project关系1}}模型爆炸：

Error while loading route: TypeError: Cannot set property 'store' of undefined
    at Ember.Object.extend.modelFor (http://localhost:3000/assets/ember-data.js?body=1:9813:23)
    at Ember.Object.extend.recordForId (http://localhost:3000/assets/ember-data.js?body=1:9266:21)
    at deserializeRecordId (http://localhost:3000/assets/ember-data.js?body=1:10197:27)
    at deserializeRecordIds (http://localhost:3000/assets/ember-data.js?body=1:10211:9)
    at http://localhost:3000/assets/ember-data.js?body=1:10177:11
    at http://localhost:3000/assets/ember-data.js?body=1:8518:20
    at http://localhost:3000/assets/ember.js?body=1:3404:16
    at Object.OrderedSet.forEach (http://localhost:3000/assets/ember.js?body=1:3247:10)
    at Object.Map.forEach (http://localhost:3000/assets/ember.js?body=1:3402:10)
    at Function.Model.reopenClass.eachRelationship (http://localhost:3000/assets/ember-data.js?body=1:8517:42)

根据我的调查，这似乎是因为它无法找到将Event映射回Project的反向关系，因为没有父ID。

是否可以在Ember Data中创建关系以支持此功能？或者是否可以修改序列化程序以在加载前为每个事件追加projectId？

我使用的是Ember 1.5.0-beta.4和Ember Data 1.0.0-beta.7 + canary.f482da04。

Answer 1

假设您的Project模型设置如下：

App.Project = DS.Model.extend({
  events: DS.hasMany('event');
});

您需要确保API中的JSON具有Ember-Data所期望的特定形状。

{
  "project": {
    "id": 1,
    "events": ["1", "2"],
  },

  "events": [{
    "id": "1",
    "name": "foo"
  }, {
    "id": "2",
    "name": "bar"
  }]
}

但是，您可以在模型的序列化程序中实现extractArray，将JSON从服务器转换为类似上述示例的内容。

Ember docs中有一个工作示例和解释。

Ember数据序列化没有父ID的关系

1 个答案: