I'm happy to say that I started to build API-only ruby on rails (ongoing) course with a written format that teaches how to build restful API while using best practices.
We are going to develop a functional clone of instapaper from scratch. The course targets developers that are already familiar with rails tech stack and will cover different topics including, authorization, payment, error handling, deployment, and performance.
I'm planning to share a new chapter weekly basis. You can follow me on twitter to get notified about new chapters.