相关疑难解决方法(0)

我正面临Backbone.js上的"更改事件未触发"问题= /

这里是我对用户模型的看法:

    window.UserView = Backbone.View.extend({

        ...

        initialize: function()
        {
            this.model.on('destroy', this.remove, this);

            this.model.on('change', function()
            {
               console.log('foo');
            });
        },

        render: function(selected)
        {
            var view = this.template(this.model.toJSON());

            $(this.el).html(view);

            return this;
        },

        transfer: function(e)
        {                
            var cas = listofcas;

            var transferTo = Users.getByCid('c1');
            var transferToCas = transferTo.get('cas');

            this.model.set('cas', cas);
            console.log('current model');
            console.log(this.model);

            //this.model.change();
            this.model.trigger("change:cas");
            console.log('trigger change');

            transferTo.set('cas', transferToCas);
            console.log('transferto model');
            console.log(transferTo);

            //transferTo.change();
            transferTo.trigger("change:cas");
            console.log('trigger change');

        }

    });

在这里,用户模型:

window.User = Backbone.Model.extend({

        urlRoot: $('#pilote-manager-app').attr('data-src'),

        initialize: function()
        {
            this.set('rand', 1);
            this.set('specialite', this.get('sfGuardUser').specialite);
            this.set('name', this.get('sfGuardUser').first_name …

 Person = Backbone.Model.extend({
        defaults: {
            name: 'Fetus',
            age: 0,
            children: []
        },
        initialize: function(){
            alert("Welcome to this world");
        },
        adopt: function( newChildsName ){
            var children_array = this.get("children");
            children_array.push( newChildsName );
            this.set({ children: children_array });
        }
    });

    var person = new Person({ name: "Thomas", age: 67, children: ['Ryan']});
    person.adopt('John Resig');
    var children = person.get("children"); // ['Ryan', 'John Resig']

在此示例代码中,我们有:

children_array = this.get("children")

我以为这只会指向内存中的相同数组(因此也是O(1)).然而,我认为这将是一个设计层,因为可以在不使用this.set()的情况下操纵数组,然后事件监听器就不会触发.

所以我猜它(不知何故神奇地)复制数组？

http://backbonejs.org/#Model-set

怎么了？

编辑:我刚刚在https://github.com/documentcloud/backbone/blob/master/backbone.js的骨干源代码中找到了实现(我在底部粘贴了相关代码)

获得回报:

return this.attributes[attr]

所以这只会指向内存中的相同数组吗？所以可以在不使用set()的情况下更改数组,这样会很糟糕......？我对么？

get: function(attr) {
      return this.attributes[attr];
    },

    // Get …