Backbone.js的多个字段集合比较排序？ [英] Backbone.js collection comparator sort by multiple fields?

问题描述

  this.col = Backbone.Collection.extend({
    model: M,
    comparator: function(item) {
      return item.get("level");
    }
  });

这上面code排序按级别项目。我想通过水平进行排序，然后按标题。我能做到这一点？谢谢你。

This above code sorts items by level. I want to sort by level, then by title. Can I do that? Thanks.

推荐答案

@ amchang87的答案肯定工作，但另一个我找到方法加工的仅仅是返回排序字段的数组：

@amchang87's answer definitely works, but another that I found worked is simply returning an array of the sortable fields:

this.col = Backbone.Collection.extend({
    model: M,
    comparator: function(item) {
      return [item.get("level"), item.get("title")]
    }
});

我已经在多个浏览器，因为我觉得它依赖于JS的排序顺序为数组的行为（根据它们的内容），没有测试呢。这肯定工作在WebKit的。

I haven't tested this in multiple browsers yet as I think it relies on JS' behavior in sort order for arrays (based on their contents). It definitely works in WebKit.

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