模型发射的骨干事件（双重射击） [英] Backbone events on model firing on collection (Double firing)

问题描述

我正在开发的骨干应用程序有一个集合和一个模型，并且每个项目都有相关的视图。

A Backbone app which I'm developing has a collection and a model, and associated views for each item.

https://gist.github.com/2255959

当我点击PostView时，意外的是，事件在集合上触发而没有任何布线。

When I click on the PostView, unexpectedly, the event fires on the collection without any wiring.

我想我需要绑定一个事件到模型，然后在该集合上触发一个事件。不是吗？一个集合是否自动继承事件触发了其子模型？

I figured I'd need to bind an event to the model, then have that fire an event on the collection. Is that not the case? Does a collection automagically inherit events fired its child models?

我不确定，但我认为这与嵌套视图有关，也许事件正在绑定在两个地方，而不是内部 el 。

I'm uncertain, but I think it has something to do with the nested views, and maybe the event is being bound on both places instead of just the inner el.

推荐答案

从精细手册：

为了方便，在集合中的模型上触发的任何事件也将被直接触发。

Any event that is triggered on a model in a collection will also be triggered on the collection directly, for convenience.

所以是该集合侦听所有模型上的事件并转发它们。

So yes, the collection listens to events on all of its models and forwards them.

例如，给出了一个简单的设置：

For example, given a simple set up like this:

class M extends Backbone.Model

class C extends Backbone.Collection
    model: M

c = new C
c.on('change', (model, opts) -> console.log('Change on collection'))

执行 c.first（）。set（...）将触发事件处理程序。

Doing c.first().set(...) will trigger the event handler.

演示： http://jsfiddle.net/ambiguous/wwjnK/

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