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如何解析响应值..我想从 json 值中获取 json 值....但是在解析时遇到问题....

var ListView = Backbone.View.extend({
    el: '#app-container',

    initialize: function() {
        _.bindAll(this,"render");
        console.log('ListView init.');
        this.counter = 0;
        this.collection = new FieldCollection();
        this.collection;
        this.render(this.collection);
    },

    events: {
        'click #add': 'addItem'
    },

   render: function(val) {
        console.log(val);
        console.log('Render called.');

    },
});

我的json如下...

[
{
    "name": "qqqqqqqqqqqqqqqqqqq",
    "img": "qqqqqqqqqqqqqqqqqqqq"
},
{
    "name": "eeeeeeeeeeeeeeeeeee",
    "img": "eeeeeeeeeeeeeeeeeee"
},
{
    "name": "ggggggggggggggggggg",
    "img": "gggggggggggggggggggg"
}
]

我的问题是如何解析响应值...

如何访问视图中的json值...

var FieldCollection = Backbone.Collection.extend({
    defaults: {
        model: Field
    },
    model: Field,
    url: 'http://localhost:8080/backbonejs/myjsoncollection.json',
    initialize: function() {
        console.log('FieldCollection init.');
    },
    parse: function(response) {
      console.log(response);
      return response;
    }
});

这是整个代码...

$(function(){

var Field = Backbone.Model.extend({
    defaults: {
        name: "shaleen",
        img: "not found",
    },
    initialize: function() {
       // console.log(this.attributes.name);
    }
});
 var FieldCollection = Backbone.Collection.extend({
    defaults: {
        model: Field
    },
    model: Field,
    url: 'http://localhost:8080/backbonejs/myjsoncollection.json',
    initialize: function() {
        console.log('FieldCollection init.');
    },
/*  parse: function(response) {
      console.log(response);
      return response;
    }*/
});

var ListView = Backbone.View.extend({
    el: '#app-container',
    initialize: function() {
        _.bindAll(this,"render");
        console.log('ListView init.');
        this.counter = 0;
        var jsonfield = new FieldCollection();
        jsonfield.fetch();
        this.render(jsonfield);
    },
   render:function(collection){
        _.each(collection, function(model){
            console.log(model.get('name'));
        });

        _.each(function(model){
            console.log(model.get('name'));
            console.log(model.get('img'));
        },this);
    }
});

var listView = new ListView();

});

4

1 回答 1

0

parse函数是可选的，你只需要实现它，如果你从服务器接收到数据后有什么特别的事情发生。为了隔离可能的错误来源，我将首先通过不连接到您的服务器来简化您的方法。请运行以下代码：

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

var FieldCollection = Backbone.Collection.extend({
    model: Field,
});

var ListView = Backbone.View.extend({
    el: '#app-container',

    initialize: function() {
        this.collection = new FieldCollection();
        this.collection.add([{name:'name1',img:'img1'},{name:'name2',img:'img2'}]);
        this.render(this.collection);
    },

    render(collection){
        collection.each(function(model){
            console.log(model.get('name')+' '+model.get('img'));
    },this);
});

如果可行，请应用以下 2 项更改：

  1. 更改集合以包含 url：

    var FieldCollection = Backbone.Collection.extend({
    model: Field,
    url='http://localhost:8080/backbonejs/myjsoncollection.json'
});

  2. 更改 View 的初始化函数以进行获取：

    initialize: function() {
    this.collection = new FieldCollection();
    this.collection.fetch();
    this.render(this.collection);
},

请先运行简化版本，如果这适用于扩展版本。

于 2012-08-16T09:53:53.937 回答