Chris@909: class AddParentIdToEnumerations < ActiveRecord::Migration
Chris@909:   def self.up
Chris@909:     add_column :enumerations, :parent_id, :integer, :null => true, :default => nil
Chris@909:   end
Chris@909: 
Chris@909:   def self.down
Chris@909:     remove_column :enumerations, :parent_id
Chris@909:   end
Chris@909: end