I just forked Michael Hartl rails tutorial app and created an API for that. Then I built an Ember version of it which works pretty great!

Rails app: code: https://github.com/vasilakisfil/rails_tutorial_api heroku: https://rails-tutorial-api.herokuapp.com/

Ember app (which talks to the Rails app): code: https://github.com/vasilakisfil/rails_tutorial_ember heroku: https://ember-on-rails-tutorial.herokuapp.com/

A blog post is coming during March but for now you can dig in the code and see that’s it’s extremely easy to create REST APIs in plain Rails.