What topics should I write Ruby/Rails articles on?

Question

Ruby on Rails

Good day!
I have been working with Ruby on Rails and the Ruby language itself for quite some time. There is a lot of experience and knowledge that I would like to share with you.
I would like to hear what topics are of interest to the Habra community?

Answer 1

Tell me how to write an api for a rails application, with authorization and all. That is, not the api itself on rails, but a working application + api for accessing application data from the outside. It would be very interesting.

Answer 2

1) Search implementation (pg_search, elasticsearch)
2) Tests
3) Frontend (Angular, for example...)

Answer 3

про внутренности

Answer 4

rack и middleware: очень мало информации, очень мало документации, если только в чужих сырцах лазить.