backbone.js - collection.each() 不迭代模型

Question

我正在尝试迭代由集合获取的模型。

我有以下代码:

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

            renderCollection: function() {
                console.log("rendering collection");
                this.collection.each(function(index,model){
                    console.log("model"); 
                });
                console.log(this.collection);
            },

render: function() {
                this.template = _.template(template, {});
                this.$el.html(this.template);
                // some other stuff
                this.renderCollection();
}

和结果:

rendering collection

d {models: Array[0], length: 0, _byId: Object, constructor: function, model: function…}
_byId: Object
_idAttr: "id"
length: 4
models: Array[4]
0: d
_changing: false
_events: Object
_pending: false
_previousAttributes: Object
attributes: Object
created: "2013-02-13 09:22:42"
id: "1"
modified: "2013-02-13 09:22:42"
role: "admin"
username: "email@gmail.com"
__proto__: Object
changed: Object
cid: "c5"
collection: d
id: "1"
__proto__: e
1: d
2: d
3: d
length: 4
__proto__: Array[0]
__proto__: e
 user_list.js:25

所以 fetch 方法确实有效 - 在对象转储中我可以找到 4 条记录，但迭代集合不起作用......

Answer 1

做 each收藏上给 model本身作为 argument .

尝试这个:

this.collection.each(function(model){
  console.log(model); 
});

它应该给你 model对于当前迭代。