Emberjs路由

App.Router.map(function() {
  this.resource('topCharts', function() {
    this.route('choose', { path: '/' });
    this.route('albums');
    this.route('songs');
    this.route('artists');
    this.route('playlists');
  });
});

App.TopChartsChooseRoute = Ember.Route.extend({
  beforeModel: function() {
    var lastFilter = this.controllerFor('application').get('lastFilter');
    this.transitionTo('topCharts.' + (lastFilter || 'songs'));
  }
});

// Superclass to be used by all of the filter routes below
App.FilterRoute = Ember.Route.extend({
  activate: function() {
    var controller = this.controllerFor('application');
    controller.set('lastFilter', this.templateName);
  }
});

App.TopChartsSongsRoute = App.FilterRoute.extend();
App.TopChartsAlbumsRoute = App.FilterRoute.extend();
App.TopChartsArtistsRoute = App.FilterRoute.extend();
App.TopChartsPlaylistsRoute = App.FilterRoute.extend();

　　

model钩子包含了基于承诺暂停过渡的许多应用场景，但是有的时候还是需要beforeModel和afterModel这两个钩子来提供帮助。最常见的原因是通过{{link-to}}或者{{transitionTo}}（最为URL改变导致的过渡的对比）过渡到一个具有动态URL端，这时将过渡到的路由的模型早早就被指定了（例如{{#link-to 'article' article}}或者this.transitionTo('article', article)），这种情况下，model钩子并不会被调用。当路由正在收集所有路由的模型来执行过渡时，就需要使用beforeModel和afterModel钩子来处理所有逻辑。?