What is concern and when, why does it use in rails?

sdubois · April 21, 2021, 4:06pm

This new section in the getting started guide might be helpful.

See prior discussion:

github.com/rails/rails

Add Concerns section in Refactoring portion of Getting Started guide

rails:master ← maryammouse:maryammouse-concerns-docs

opened 03:28AM - 01 Jul 20 UTC

maryammouse

+187 -0

### Summary * Adds a new Concerns section to the Getting Started guide, underne…ath the Refactoring header * Updates a later code snippet to reflect the changes made in the Concern section **Why?** * This addresses the need for documentation on concerns; a new Rails app contains `concerns` folders for controllers and models but their purpose is not explained. * This has been requested by many people over the years (see previous [PR](https://github.com/rails/rails/pull/21114) and corresponding [Discourse thread](https://discuss.rubyonrails.org/t/helping-devs-understand-concerns-faster/74619/44)) ### Other Information ~ I am addressing feedback in new commits and will squash all before merging. :)