如何为Ember数据创建自定义Serializer

Question

我有一个返回JSON的API,它没有为Ember的消费格式正确.而不是这(烬预期):

{ events: [
    { id: 1, title: "Event 1", description: "Learn Ember" },
    { id: 2, title: "Event 2", description: "Learn Ember 2" }
]}

我明白了:

{ events: [
    { event: { id: 1, "Event 1", description: "Learn Ember" }},
    { event: { id: 2, "Event 2", description: "Learn Ember 2" }}
]}

因此,如果我理解正确,我需要创建一个自定义Serializer来修改JSON.

var store = DS.Store.create({
    adapter: DS.RESTAdapter.create({
        serializer: DS.Serializer.create({
            // which hook should I override??
        })
    })
});

我已经阅读了与DS.Serializer相关的代码注释,但我无法理解如何实现我想要的...

我该怎么做？

ps:我的目标是App.Event.find()开展工作.目前,我明白了Uncaught Error: assertion failed: Your server returned a hash with the key 0 but you have no mapping for it.这就是我需要修复收到的JSON的原因.

编辑:这是我现在的工作方式:

extractMany: function(loader, json, type, records) {
    var root = this.rootForType(type),
    roots = this.pluralize(root);

    json = reformatJSON(root, roots, json);
    this._super(loader, json, type, records);
  }

Answer 1

我假设响应仅包含ID,并且您尝试提取它们.

您将需要子类DS.JSONSerializer,它提供了处理JSON有效负载的基本行为.特别是,您将要覆盖extractHasMany挂钩:

// elsewhere in your file
function singularize(key) {
  // remove the trailing `s`. You might want to store a hash of
  // plural->singular if you deal with names that don't follow
  // this pattern
  return key.substr(0, key.length - 1);
}

DS.JSONSerializer.extend({
  extractHasMany: function(type, hash, key) {
    return hash[key][singularize(key)].id;
  }
})