ActiveSupport::ConcernActive Support Concern¶ ↑ A typical module looks like this: module M def self.included(base) base.extend ClassMethods base.class_eval do scope :disabled, -> { where(disabled: true) } end end module ClassMethods ... end end By using ActiveSupport::Concern the above module could instead be written as: require "active_support/concern" module M extend ActiveSupport::Concern included do scope :disabled
Rails extending ActiveRecord::Base
