过滤一个主干集合返回一个模型数组 [英] Filtering a Backbone Collection returns an array of Models

问题描述

示例代码:

this.books = this.getBooksFromDatabase();
this.publishedBooks = this.books.filter(function(book) {
  return book.get("isPublished") === "1";
});

问题就在这里:

this.books.filter，返回一个模型数组.我试过包装数组，如下所示:

this.books.filter, returns an array of the models. I've tried wrapping the array, as such:

var publishedBooks = _( this.books.filter(function(book) {
  return book.get("isPublished") === "1";
}))

正如这篇文章所推荐的:https://github.com/documentcloud/backbone/issues/120

as recommended by this post: https://github.com/documentcloud/backbone/issues/120

但我仍然无法运行以下内容:已出版Books.each(...)，或已出版Books.get(...)

But i still can't run things like: publishedBooks.each(...), or publishedBooks.get(...)

我错过了什么?有没有办法将返回的数组转换为集合?

What am I missing? Is there a way to convert the returned array into a collection?

推荐答案

您可以实例化一个新的主干集合并传入数组.

You could either instantiate a new backbone collection and pass in the array.

var myPublishedBooks = new MyBooksCollection(publishedBooks);

或者您可以刷新您的原始收藏.

Or you could refresh your original collection.

this.books.refresh(publishedBooks)

<小时>

注意2011 年 7 月发布的 0.5.0 更名为 refresh 到 reset，这样你就可以在新版本的 Backbone 中使用;

---

Note that the 0.5.0 release in July 2011 renamed refresh to reset, so you can achieve this in newer versions of Backbone with;

this.books.reset(publishedBooks)

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