Javascript 如何通过 ID 从 Backbone.js 集合中获取模型？
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How do I get a model from a Backbone.js collection by its id?
提问by Thomas Hunter II
In my app, everything I do with data is based on the primary key as the data is stored in the database. I would like to grab a model from a collection based on this key.
在我的应用程序中，我对数据所做的一切都基于主键，因为数据存储在数据库中。我想从基于此键的集合中获取模型。
Using Collection.at() requires the array index, Collection.getByCid() requires the client ID that backbone randomly generates.
使用 Collection.at() 需要数组索引，Collection.getByCid() 需要主干随机生成的客户端 ID。
What is the best way to grab the model I want from the collection with the given id value? I figure the worst I could do would be to iterate over each item, .get('id'), and return that one.
从具有给定 id 值的集合中获取我想要的模型的最佳方法是什么？我认为我能做的最糟糕的事情是迭代每个项目，.get('id')，然后返回那个项目。
回答by nikoshr
Take a look at the get method, it may be of some help :)
看看 get 方法，它可能有一些帮助:)
http://backbonejs.org/#Collection-get
http://backbonejs.org/#Collection-get
getcollection.get(id)
Get a model from a collection, specified by an id, a cid, or by passing in a model.
get collection.get(id)
从集合中获取模型，由 id、cid 指定，或通过传入模型。
回答by Nenotlep
If your data requires you to use a different kind of key or a set that doesn't mesh well with at(), getByCid()or get(), there is also where(). Something like this might work:
如果您的数据要求您使用不同类型的密钥或与at()、getByCid()或不能很好地配合的集合，get()则还有where(). 像这样的事情可能会奏效：
window.lib = new Library;
window.lib.fetch([
success: function(model, response) {
console.log(window.lib.where({'BookID':488, 'Rev':2, 'Status':'Active'});
}
});
