lib/assign_uuid.rb

   1 module AssignUuid
   2
   3   def self.included(base)
   4     base.extend(ClassMethods)
   5     base.before_create :assign_uuid
   6   end
   7
   8   module ClassMethods
   9     def uuid_prefix
  10       Digest::MD5.hexdigest(self.to_s).to_i(16).to_s(36)[-5..-1]
  11     end
  12   end
  13
  14   protected
  15
  16   def respond_to_uuid?
  17     self.respond_to? :uuid
  18   end
  19
  20   def assign_uuid
  21     return true if !self.respond_to_uuid?
  22     self.uuid = [Server::Application.config.uuid_prefix,
  23                  self.class.uuid_prefix,
  24                  rand(2**256).to_s(36)[-15..-1]].
  25       join '-'
  26   end
  27 end