Should not use `needs` to load other controllersJS-0770

Avoid using needs to load other controllers. Inject the required controller instead. needs was deprecated in ember 1.x and removed in 2.0.

Bad Practice

export default Controller.extend({
  needs: ['comments'],
  newComments: alias('controllers.comments.newest')
});

Recommended

import Controller, { inject as controller } from '@ember/controller';

export default Component.extend({
  comments: controller(),
  newComments: alias('comments.newest')
});