module Fr
  module Base
    def self.included(base)
      base.class_eval do
        validate :validate_it

      protected
        def validate_it
          return true if something?
        end
      end
      base.send :include, InstanceMethods
      base.send :extend,  ClassMethods
    end

    module ClassMethods
      def enroll_user(image)
      end
    end

    module InstanceMethods
      def instance_method
      end
    end
  end
end

class Photo < ActiveRecord::Base
  include Fr::Base
end