@claptimes解决方案可能会工作，但它会复制原始的实现，我认为这是一个不好的做法，因为你必须手动保持最新版本的ember数据：）

@claptimes solution would probably work, but it copies the original implementation which I think is a bad practice since you'll have to manually keep it up to date to the latest version of ember data:)

此外，我注意到您正在设置已被弃用一段时间的 url 属性（ https://github.com/emberjs/data/blob/eeb6162f65513caa19ce18887c3f4d1c2014d80c/TRANSITION.md ＃host-and-namespace-configuration ）。

Also I noticed you're setting the url property which has been deprecated for a while (https://github.com/emberjs/data/blob/eeb6162f65513caa19ce18887c3f4d1c2014d80c/TRANSITION.md#host-and-namespace-configuration).

这里有一个解决方案，调用 _super 和不覆盖完整的方法：

Here is a solution that calls _super and doesn't override the complete method:

App.ApplicationAdapter = DS.RESTAdapter.extend({
  buildURL: function() {
    return this._super(...arguments) + '.json';
  }
});