acts_as_content.rb

class BaseClass; end

class ChildClass < BaseClass
  acts_as_content
end

class OtherChildClass < BaseClass; end


module ActsAsContent
  def self.extended(base)
    class << base
      attr_accessor :acting_as_content
    end
    base.acting_as_content = false
  end
  
  def acts_as_content(options={})
    self.acting_as_content = true
  end
end

BaseClass.extend ActsAsContent