uuid.rb

require 'rubygems'
require 'uuidtools'

module DataMapper
  module Types
    class UUID < DataMapper::Type
      default lambda { ::UUID.random_create }

      def self.load(value, property)
        puts value.inspect
        return nil if value.nil?
        ::UUID.parse(value) 
      end

      def self.dump(value, property)
        return nil if value.nil?
        value.to_s
      end

      def self.typecast(value, property)
        value.kind_of?(::UUID) ? value : load(value, property)
      end

      ::DataMapper::Property::TYPES << self
    end
  end
end