在控制器中使用需要 >

in a controller you would use needs and then get it off the controller.

App.FooController = Ember.ObjectController.extend({
  needs:['userActions'],
  blah: function(){
    var userActionsModel = this.get('controllers.userActions.model');
  }
});

http://emberjs.jsbin.com/dofedehi/1/edit