Backbone Collection添加事件触发一次

Question

我有一个Backbone集合,当我添加一个新模型时,"添加"事件似乎并没有像我期望的那样工作.我绑定了2个视图来监听集合上的添加事件,但只有一个似乎得到了事件的通知,当发生这种情况时,没有PUT请求被发送到我的服务器.当我删除第二个绑定时,另一个工作,并发送PUT请求.这是代码片段:

    var FlagList = Backbone.Collection.extend({
    model: Flag  // model not shown here... let me know if it would help to see
});

    var FlagCollectionView = Backbone.View.extend({
    el: $('ul.#flags'),
    initialize: function() {
        flags.bind('add', this.addFlag, this);  // this one doesn't fire!!
    },
    addFlag: function(flag) {
        alert("got it 1");  // I never see this popup
    }
});

    var AddFlagView = Backbone.View.extend({
    el: $("#addFlagPopup"),
    events: {
        "click #addFlag": "addFlag"
    },
            initialize: function() {
                    flags.bind('add', this.closePopup, this);   // this one fires!!
            }
    addFlag: function() {
        flags.create(new Flag);
    },
    closePopup: function() {
        alert("got it 2");  // I see this popup
    }
});

var flags = new FlagList;
var addFlagView = new AddFlagView;
var flagCollectionView = new FlagCollectionView;

Answer 1

一些建议:

ID与类

通过组合一个类和一个id,你已经完全限定了你的选择器.jQuery允许这样,但ID选择器在页面上应该是唯一的,所以el: $('ul.#flags')改为el: $('ul#flags').

利用骨干网

我喜欢将我的集合和/或模型明确地传递给我的视图,collection并model在视图中使用魔术和属性.

var flags = new FlagList;
var addFlagView = new AddFlagView({collection: flags});
var flagCollectionView = new FlagCollectionView({collection: flags});

现在意味着在您的视图中,您将自动访问this.collection

解除绑定事件以避免鬼视图

var FlagCollectionView = Backbone.View.extend(
{
    initialize: function (options)
    {
        this.collection.bind('add', this.addFlag, this);
    },
    addFlag: function (flag)
    {
        alert("got it 1");
    },
    destroyMethod: function()
    {
        // you need some logic to call this function, this is not a default Backbone implementation
        this.collection.unbind('add', this.addFlag);
    }
});

var AddFlagView = Backbone.View.extend(
{
    initialize: function ()
    {
        this.collection.bind('add', this.closePopup, this);
    },
    closePopup: function ()
    {
        alert("got it 2");
    },
    destroyMethod: function()
    {
        // you need some logic to call this function, this is not a default Backbone implementation
        this.collection.unbind('add', this.closePopup);
    }
});

看起来我必须同意@fguillen,你的问题必须在初始化视图的某个地方,就像在我的评论中我提到它很可能与时间有关,即:在'add之后将你的事件绑定到集合'事件已经解雇了.