无法访问Backbone View Handlebars中的json对象

Backbone View:

        var $ = require('jquery'),
        Handlebars = require('handlebars'),
        Backbone = require('backbone'),
        channel = require('../../templates/dashboard/channelstats.html'),
        channelstatsCollection = require('../../collections/dashboard/ChannelStatsCollection'),
        mainJs = require('../../libs/main');
var ChannelStatsView = Backbone.View.extend({
    el: "#divstatsview",
    initialize: function () {

        this.collection = new channelstatsCollection();

        var api_token = mainJs.get_api_token();

        this.collection.fetch(
                {
                    headers: {'Authorization': 'Bearer ' + api_token.access_token},
                    success: function (collection, response, options) {

                        var tpl = channel;

                        console.log(JSON.stringify(response));
$(this.el).html(tpl({orders:JSON.stringify(response)}));                         
                    }
                }
        );



    }

});
// Our module now returns our view
module.exports = ChannelStatsView;
        var $ = require('jquer