EmberJS transitionToRoute error.

emberjs-transition.coffee

App.Router.map ->
  @route 'index', {path: "/#{short_name}"}
  @route 'customList', {path: "/#{short_name}/custom-list/:list_name"}
  @route 'multiLevelList', {path: "/#{short_name}/multi-level-list/:list_name/:list_level"}

App.EventController = Em.ObjectController.extend
  goTo: (navbar_icon) ->
    @transitionToRoute navbar_icon.route, navbar_icon.context
    
# Sample passed navbar_icon
navbar_icon =
  img_src: '/somesource_or_another.jpg'
  display_name: 'My Link Name!'
  route: 'customList'
  context: {list_name: 'Exhibitors'}

navbar.handlebars

{{#each controller.navbarIcons}}
  <li><a {{action goTo this}}><img {{bindAttr src="image_src"}} width="36" height="36" />{{display_name}}</a></li>
{{/each}}