Try Admin into your app:
gem "ember-admin", git: "[email protected]:roundscope/ember-admin.git"
Or use development application
Modify for application.css
*= require ember-admin/admin
Modify for application.js
#= require jquery
#= require jquery_ujs
#= require handlebars
#= require ember
#= require ember-data
#= require ember-admin/main
##For run install generator
rails g ember_admin:install
##Then add generated folder in app
#= require_tree ./admin