从Backbone.Collection.remove（n） [英] retrieve element from Backbone.Collection.remove(n)

问题描述

我正在使用Backbone.js执行我的第一步，其中一个涉及能够从集合中删除项目，更重要的是，检索该项目。 Backbone.Collection.remove方法简单地返回原始集合，并且项目已删除，因此目前我在删除之前获取对所需项目的引用：

  var Collection = Backbone.Collection.extend（... Backbone.Models ...数组），
 removedItem = Collection.get（3）; 
 console.log（Collection.remove（3））; //同一集合sans＃3 
  

我的问题是如果有一个短手方法检索删除项目？

编辑：JFTR，我已经读了一个公平的源，知道原始方法返回对集合的引用 -

  remove：function（models，options）{
 // < snip为简洁> 
 //链模式传入
 return this; 
}，
  

我似乎很奇怪，它没有返回删除的项目。 ，所以我只是想知道是否有另一种方法，我错过了，或一个通用的方式实现这种模式。这不是我第一次使用一个长的解决方法当API有一些秘密doohickey它的袖子...因为它是可能会扩展类。

<$ p

您可以向Backbone.Collection'type'添加一个函数，并在您创建的每个集合中使用removeModel。 $ p> Backbone.Collection.prototype.removeModel（model）{
var _model = this.get（model）;
this.remove（item）;
return _model;
}

var removedModel = collection.removeModel（model）;


I'm taking my first steps with Backbone.js, and one of those involves being able to remove an item from a collection, and more importantly, retrieve that item. The Backbone.Collection.remove method simply returns the original collection with the item removed, so at the moment I'm obtaining a reference to the desired item prior to removal:

var Collection = Backbone.Collection.extend(...array of Backbone.Models...),
    removedItem = Collection.get(3);
console.log(Collection.remove(3));//same collection sans #3

My question is if there is a short hand method for retrieving the remove item?

Edit: JFTR, I've read a fair bit of the source, and know that the original method returns a reference to the collection -

remove: function(models, options) {
  // <snip for brevity>
  // chain pattern incoming
  return this;
},

It seemed odd to me that it didn't return the removed item., so I was just wondering if there was another method I'm missing, or a common way of achieving this pattern. Wouldn't be the first time I've used a long workaround when the API had some secret doohickey up it's sleeve...as it is I'll probably extend the class.

解决方案

You could add a function to the Backbone.Collection 'type' and use removeModel on every collection you create.

Backbone.Collection.prototype.removeModel(model) {
    var _model = this.get(model);
    this.remove(item);
    return _model;
}

var removedModel = collection.removeModel(model);

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