view db/migrate/20090406161854_add_parent_id_to_enumerations.rb @ 402:ef8a9bc67e15 feature_36

Fixed the migrations, so that the one-to-one association works correctly.

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

  def self.down
    remove_column :enumerations, :parent_id
  end
end