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

rails6learner · April 21, 2021, 4:02pm

Hi all,

Please explain me about this.

Thanks

Learning

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. :)

amitsavani · April 25, 2021, 10:38am

Topic		Replies	Views
Helping devs understand concerns faster A May Of WTFs	62	15176	September 23, 2020
Concerns vs libraries rubyonrails-talk	2	241	July 27, 2013
Help : What is concern in ruby on rails and what is difference between mixins and concern? rubyonrails-core feature	1	775	August 21, 2020
[blog post] Why I Don't Use ActiveSupport::Concern rubyonrails-talk	0	143	December 28, 2012
Newb Questions on laying out a project rubyonrails-talk	2	118	February 22, 2007

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

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