Backbone.js - 从 url 获取 JSON [英] Backbone.js - Getting JSON back from url

问题描述

在尝试学习 Backbone.js 时，我一直在尝试使用以下代码获取 JSON 文件的内容:

While trying to learn Backbone.js, I've been trying to grab the content of a JSON file using the following code:

(function($){
    var MyModel = Backbone.Model.extend();
    var MyCollection = Backbone.Collection.extend({
        model : MyModel,
        url: '/backbone/data.json',
        parse: function(response) {
          console.log(response);
          return response;
        }
    });

    var stuff = new MyCollection;
    console.log(stuff.fetch());
    console.log(stuff.toJSON());
})(jQuery)

'stuff.fetch()' 返回整个对象(包含我在 responseText 中查找的数据)，'stuff.toJSON' 不返回任何内容 ([])，但是 parse 方法中的控制台返回的正是我想要的想要(我的数据的 json 对象).

'stuff.fetch()' returns the entire object (with the data I'm after in responseText), 'stuff.toJSON' returns nothing ([]), but the console in the parse method is returning exactly what I want (the json object of my data).

我觉得我在这里遗漏了一些明显的东西，但我似乎无法弄清楚为什么我无法获得正确的数据.有人可以指出我正确的方向或告诉我我在这里做错了什么吗?我是否将模型用于错误的事情?

I feel like I'm missing something obvious here, but I just can't seem to figure it out why I can't get the right data out. Could someone point me in the right direction or show me what I'm doing wrong here? Am I using a model for the wrong thing?

推荐答案

fetch 是一个异步调用，所以如果你想得到响应，传递一个 success 回调进入论点.

fetch is a asynchronous call, so if you want to get the response, pass a success callback into the arguments.

stuff.fetch({
  success: function (collection, response) {
    console.log(response);
  }
})

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