engine/app/models/extensions/page/templatized.rb

module Models
  module Extensions
    module Page
      module Templatized

        extend ActiveSupport::Concern

        included do

          referenced_in :content_type

          field :templatized, :type => Boolean, :default => false

          field :content_type_visible_column

          before_validation :set_slug_if_templatized
        end

        module InstanceMethods

          def set_slug_if_templatized
            self.slug = 'content_type_template' if self.templatized?
          end

        end

      end
    end
  end
end