Deprecation Guide for SortableMixin

Along with Ember.ArrayController, Ember.SortableMixin will be removed in Ember 2.0.

You can migrate away from using Ember.SortableMixin by using Ember.computed.sort. Using this example:

const SongsController = Ember.ArrayController.extend(Ember.SortableMixin, {
  model: null,
  sortProperties: ['trackNumber'],
  sortAscending: false
});

let songsController = SongsController.create({ songs: songList });

You can transition to using Ember.computed.sort like this:

const SongsController = Ember.Controller.extend({
  model: null,
  sortedSongs: Ember.computed.sort('model', 'songSorting'),
  songSorting: ['trackNumber:desc']
});

let songsController = SongsController.create({ songs: songList });

You can read more about Ember.computed.sort in the Ember API documentation

Legacy support of Ember.SortableMixin will be provided via the ember-legacy-controllers addon.