Sharing common attributes and validations in Rails ActiveRecord to stay DRY

common_data.rb

# Sharing common attributes and validations in Rails ActiveRecord to stay DRY
module CommonData
  
  def self.included(clazz)
    clazz.class_eval do 
      validates :duplicate_field, presence: true, length: { maximum: 255 }

      attr_accessible :duplicate_field
    end
  end
end

class StagingRecord < ActiveRecord::Base
  include CommonData
end

class RealRecord < ActiveRecord::Base
  include CommonData
end