router.js

App.Router.map(function() {
  this.resource('channels', {path: '/'}, function() {
    this.resource('events', {path: '/:channel_id/events'});
  });
});

App.ChannelsRoute = Em.Route.extend({
  model: function() {
    return this.store.find('channels');
  }
});

App.EventsRoute = Em.Route.extend({
  model: function(params) {
    var channel = this.store.find('channels', param.channel_id);
    var events = this.store.find('events', param.channel_id);
    
    return Ember.RSVP.hash({
      channel: channel,
      events: events
    });
  },
  setupController: function(controller, model) {
    controller.set('content', model);
    controller.set('channel', model.channel);
    controller.set('events', model.events);
  }
});