EmberJS嵌套子例程自定义索引路径未按预期工作

one of the Ember Guides on routing

Router.map(function() {
  this.route('about');
  this.route('dashboard', function() {
    this.route('index', { path: '/dashboard/calendar'});
    // ^should direct all dashboard index requests to dashboard/calendar right?
    // setting path = '/calendar' also doesn't work

    this.route('calendar');
    this.route('daily-journal');
  });
});

然而,当我加载时 http://localhost:3000/dashboard