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Backbone.js视图绑定到外部模型

[英]Backbone.js Views bound to external model

原文 2011-05-19 03:11:54 7 1 javascript/ model-view-controller/ backbone.js

Say ListTwoItemView which is used to represent model ListTwoItem , and that ListTwoItem holds the ID of a ListOneItem to which it is linked. 说ListTwoItemView这是用来表示模型ListTwoItem ，并且ListTwoItem持有的ID ListOneItem到它链接。

If the user deletes a ListOneItem , all ListTwoItem 's that link to it should be deleted. 如果用户删除ListOneItem ， ListTwoItem删除所有链接到它的ListTwoItem 。 Does it make sense if I bind the ListTwoItemView to the linked ListOneItem so that should the referenced item be deleted - the ListTwoItem model and view are also both removed? 如果我将ListTwoItemView绑定到链接的ListOneItem上是否有意义，那么是否应该删除引用的项目ListTwoItem模型和视图也都被删除了？

1 个解决方案

No it doesn't. 不，不是。 Models do not know about views. 模型不了解视图。 What you normally do in that case is that your ListOneItem will destroy your ListTwoItem when it is destroyed itself. 在这种情况下，您通常会执行以下操作：ListOneItem在销毁自身时会销毁ListTwoItem。

This will raise a "delete" event on the collection the ListTwoItem is part of (if it is not part of anything, you must trigger an event yourself). 这将在ListTwoItem所属的集合上引发一个“删除”事件（如果它不属于任何内容，则必须自己触发一个事件）。 Listen to that event and remove/rerender the view as needed. 收听该事件，并根据需要删除/渲染视图。