Question

我从collection.fetch()调用返回一个带有多个嵌套对象的对象。有没有办法解析这些子对象并将它们作为单独的模型传递给集合？

这是我要回来的数据的一个例子。当从服务器获取时，我想将它作为3个模型传递给集合。

这是我正在努力的小提琴，但我不确定最好的解决方法：http://jsfiddle.net/L8ov7oo5/

来自服务器的数据：

{
  "slides": {
    "date": "August 21, 2014",
    "Author": "Luke Skywalker",
    "slide1": {
        "content": {
            "headline": "headline 1",
            "desc": "description for slide 1",
            "image": [
                {
                    "url": "http://placekitten.com/100/100",
                    "type": "thumbnail",
                    "alt": "imageofakitten"
                }
            ]
        }
    },
    "slide2": {
        "content": {
            "headline": "headline2",
            "desc": "descriptionforslide2",
            "image": [
                {
                    "url": "http: //placekitten.com/125/125",
                    "type": "thumbnail",
                    "alt": "imageofakitten"
                }
            ]
        }
    },
    "slide3": {
        "content": {
            "headline": "headline3",
            "desc": "descriptionforslide3",
            "image": [
                {
                    "url": "http: //placekitten.com/150/150",
                    "type": "thumbnail",
                    "alt": "imageofakitten"
                }
            ]
        }
    }
  }
}

我希望传递给集合的模型示例：

{
  "slide1": {
    "content": {
      "headline": "headline 1",
      "desc": "description for slide 1",
      "image": [
        {
          "url": "http://placekitten.com/100/100",
          "type": "thumbnail",
          "alt": "imageofakitten"
        }
      ]
    }
  }
}

这是我的代码，但是当我记录collection.fetch()的结果时，我在集合中看不到3个模型。

var MyModel = Backbone.Model.extend({});

var MyCollection = Backbone.Collection.extend({
  model: MyModel,

  url: 'https://api.mongolab.com/api/1/databases/parse-test/collections/parse-test-collection?apiKey=x5akja343lqkja',

  parse: function (response) {
    console.log('response', response);
    for (var prop in response[0].slides) {
        if ( response[0].slides.hasOwnProperty(prop) ) {

            // Try to add an object as a 'model' to the 'collection'
            this.add( response[0].slides[prop] );
        }
    }
    return response;
  }
});

var myCollection = new MyCollection();

myCollection.fetch().done(function () {
  // Expecting to see 3 models in this collection but I am not.
  console.log(myCollection);   
});

Answer 1

只需删除属性日期和作者并返回幻灯片

即可

  parse: function (response) {
      //console.log('response', response[0]['slides']);
      delete  response[0]['slides'].date;
      delete  response[0]['slides'].Author;
      var temp = [];
      $.each( response[0]['slides'], function(index, val) {
         temp.push(val);
      });
      return temp;
  }

DEMO

Answer 2

您的集合的解析调用应该返回一个数组。在for-in循环中，将所需的每个对象添加到数组中，并在完成后从解析中返回数组。

var obj = response[0].slides,
    returnList = [];

for (var prop in obj) {
    if (obj.hasOwnProperty(prop) && prop !== 'date' && prop !== 'Author') {
      returnList.push(obj[prop]);
    }
}
return returnList;

这里有jsfiddle来演示。

编辑：这是另一个jsfiddle演示使用_.map（）而不是for-in循环。

var obj = response[0].slides;

delete obj.date;
delete obj.Author;
return _.map(obj, function (value, key) {
    return obj[key];
});

Backbone - 将对象解析为模型以进行收集

2 个答案: