我如何使用"这个"在我的骨干视图?

时间:2011-12-04 03:21:56

标签: javascript html css backbone.js

var homeView = Backbone.View.extend({
        el:  $("#main_container"),
        initialize: function(){
            _.bindAll(this, 'render');
        },
        render:function(){
            $.get('/home', {}, function(data){
                console.log(data);
                var tpl = _.template(home_container_temp, {});
                this.el.html(tpl);
            });
        }
    });

我想做一个ajax GET请求,然后设置数据。但我无法做到,因为我得到了:

Uncaught TypeError: Cannot call method 'html' of undefined

2 个答案:

答案 0 :(得分:4)

this内的

$.get()不是指视图。

陷阱>

var homeView = Backbone.View.extend({
    el:  $("#main_container"),
    initialize: function(){
        _.bindAll(this, 'render');
    },
    render:function(){
        var $el = this.el;
        $.get('/home', {}, function(data){
            console.log(data);
            var tpl = _.template(home_container_temp, {});
            $el.html(tpl);
        });
    }
});

答案 1 :(得分:0)

这是“动态this”的JavaScript功能,如果您想在回调中使用“this”,请将其保留在回调之外的变量中:

render: function() {
    var _this = this; // keep it outside the callback
    $.get('/home', {}, function(data){
        console.log(data);
        var tpl = _.template(home_container_temp, {});
        // use the _this variable in the callback.
        _this.el.html(tpl);
    });
}
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