I'm using Grape to build an API. I created an ActiveSupport::Concern let's say with the name Authentication and I applied some before filter so my concern looks like: module Authentication ext...

Inside app/models/abc/xyz.rb module Abc::Xyz extend ActiveSupport::Concern end Inside app/models/abc.rb class Abc < ActiveRecord::Base include Abc::Xyz end When I try to fetch data from...

I want to use concerns app/controllers/concerns/likeable.rb and app/models/concerns/likeable.rb. The first one goes to controllers and the second one goes to models. If I create two files, only ...

Just now I started to using Concerns in rails, but i have doubt why we go for concerns, because we can achieve same thing on module & mixing concept. So please any one tell about shat is the us...

What is the best way to handle testing of concerns when used in Rails 4 controllers? Say I have a trivial concern Citations. module Citations extend ActiveSupport::Concern def citations ; end en...

Let's say I have the following structure in ruby (no rails) module Parent def f puts "in parent" end end module Child def f super puts "in child" end end class A include Parent include ...

This is a great idea about concern in rails: http://37signals.com/svn/posts/3372-put-chubby-models-on-a-diet-with-concerns And it's also a good idea to make very small methods that are not part of...

With Rails concerns I can give my model class methods and instance methods through modules by including them. No blog entry or thread that I've found mentions how I can include variables in my mode...

I have an ActiveSupport::Concern module which looks roughly like the following: module MyModel module Acceptance extend ActiveSupport::Concern included do enum status: [:declined, :accepted]...

I'm stuck in a really weird issue. I recently updated from rails 4.1 to 4.2. In 4.1 everything worked fine. But now, in 4.2, it seems model concern content is beig ignored, even if the concern is f...

I have problems with validation in concern There is class /app/models/group.rb class Group < AbstractModel include Localized::Title ... end /app/models/concerns/localized/title.rb module...

I have an ActiveRecord class called User. I'm trying to create a concern called Restrictable which takes in some arguments like this: class User < ActiveRecord::Base include Restrictable # Wou...

I'm using Rails 4.0.2. I added sub directories (with model names) in Concern directory: /app/models/concerns/company/cache_concern.rb /app/models/concerns/user/cache_concern.rb /app/models/concer...