如何在Ember数据中的一个JSON请求中加载两个模型？ [英] How do I load two models in one JSON request in Ember-data?

问题描述

使用Ember-data和Ember.js，我试图加载两个具有一个JSON请求的模型。模型有类似的关系：

Using Ember-data and Ember.js, I'm trying to load two models with one JSON request. The models have a relationship analogous to this:

App.Person = DS.Model.extend({
    name:  DS.attr('string'),
    dogs:  DS.hasMany('App.Dog'),
});

App.Dog = DS.Model.extend({
    name:  DS.attr('string'),
    owner: DS.belongsTo('App.Person'),
});

我的服务器正在发送JSON：

My server is sending JSON like this:

{
    "dog": {
        "id": 1,
        "name": "Fido",
        "owner": {
            "id": 1,
            "name": "John Smith",
            "dogs": [1]
        }
    }
}

...但是，Ember数据仍然向我的服务器发送请求（使用findQuery），尝试得到所有者的JSON。

…And yet, Ember-data still sends a request (using findQuery) to my server trying to get the owner JSON.

我有一个jsFiddle设置，演示它此处。要观察问题发生，您需要转到此链接才能激活路由/模板：

I have a jsFiddle set up that demonstrates it here. To watch the problem happen, you'll need to go to this link to activate the route/template:

http://fiddle.jshell.net/6kQ8s/2/show/#/dog/1

我没有在我的适配器中定义findQuery（），因为我不需要它来获取我已经发送的数据...对吗？

I haven't defined findQuery() in my adapter on purpose because I shouldn't need that to get data that I have already sent… Right?

有人知道我在这里做错了吗？

Does anyone know what I'm doing wrong here?

推荐答案

我正在做以下（使用ember-data revision 8）

I'm doing the following (using ember-data revision 8)

App.Dog = DS.Model.extend({
    name:  DS.attr('string'),
    owner: DS.belongsTo('App.Person', { embedded: true }),
});

此外，我必须告诉序列化器加载此关系的映射。
虽然不是必需的，我使用我自己的DS.Serializer子类。在初始化
时，序列化程序加载Person类的映射，该类指定应加载
嵌入式关系。

Additionally, I have to tell the serializer to load a mapping for this relation. Though it's not required, I'm using my own DS.Serializer subclass. At initialisation time the serializer loads a mapping for the Person class, which specifies that embedded relationships should be loaded.

  App.WOSerializer = DS.Serializer.extend({
    init: function(){
      this._super();
      this.map(App.Dog, {
        person: {
          embedded: 'load'
        }
      });
  });

由问题提问者编辑：

需要在适配器中初始化序列化程序。

The serializer needed to be initialized in the adapter.

App.adapter = DS.Adapter.create({
    // ...
    serializer: App.WOSerializer.create()
});

这篇关于如何在Ember数据中的一个JSON请求中加载两个模型？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！