app/models/metadatum.rb

   1 class Metadatum < ActiveRecord::Base
   2   serialize :info, Hash
   3
   4   before_validation :populate_native_target
   5   include AssignUuid
   6
   7   def info
   8     @info ||= Hash.new
   9     super
  10   end
  11
  12   protected
  13
  14   def populate_native_target
  15     begin
  16       class_name = target_kind.
  17         sub(/^orvos#/,'').
  18         classify
  19       self.native_target_type = class_name
  20       self.native_target_id = class_name.
  21         constantize.
  22         where('uuid = ?', target_uuid).
  23         first.
  24         id
  25     rescue
  26       self.native_target_type = nil
  27       self.native_target_id = nil
  28     end
  29   end
  30 end