gistfile1.rb

module ActsAsCatchall
    def self.included(base)
      base.extend ClassMethods
    end

    module ClassMethods
      class << self; attr_accessor :catchall end

      def acts_as_catchall(options = {})
        # db_field, klass, use_method_missing = false
        @catchall = options[:db_field]

        serialize @catchall, options[:klass]

        if options[:use_method_missing]
          class_eval <<-EOV
            include ActsAsCatchall::InstanceMethods
          EOV
        end
      end
    end

    module InstanceMethods
      def method_missing(method, *args)
        # puts @catchall
        puts self.respond_to?(:catchall)
        puts self.class.respond_to?(:catchall)
      end
    end
  end


ActiveRecord::Base.class_eval { include ActsAsCatchall }