在收集主干复位事件 [英] Backbone reset event in collection

问题描述

如何骨干复位事件的作品？
据我了解

How does Backbone reset event works? As far as I understand

1. 从集合中删除所有机型


2. 添加新的牵强模式，以收集


3. 火灾复位事件

在我的情况下，每个模型借鉴SVG的东西，所以我应该叫从集合中移除模型之前删除的功能。当模型从集合中删除的事件被触发？

In my case each model draw something on SVG so I should call remove function before removing model from collection. Which event is triggered when model is removed from collection?

推荐答案

作为@保罗指出，有前重置解雇没有predefined事件。但是，您可以通过覆盖重置方法在您的收藏提供你自己的。例如，

As @Paul noted, there is no predefined event fired before a reset. However, you can provide your own by overriding the reset method on your collection. For example,

var SVGCollection = Backbone.Collection.extend({
    reset: function(models, options) {
        options = options || {};

        if (!options.silent) {
            this.trigger('prereset', this, options);
        }

        Backbone.Collection.prototype.reset.call(this, models, options);
    }
});

和示例用法

var c = new SVGCollection([
    {id: 1},
    {id: 2}
]);
c.on('prereset', function() {
    console.log(c.pluck('id'));
});
c.on('reset', function() {
    console.log(c.pluck('id'));
});
c.reset({id: 3});

请参阅 http://jsfiddle.net/nikoshr/8vV7Y/ 以演示

您还可能引发对每个型号的事件。

You could also trigger events on each model.

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