Chris@0: class AddMissingIndexesToMessages < ActiveRecord::Migration
Chris@0:   def self.up
Chris@0:     add_index :messages, :last_reply_id
Chris@0:     add_index :messages, :author_id
Chris@0:   end
Chris@0: 
Chris@0:   def self.down
Chris@0:     remove_index :messages, :last_reply_id
Chris@0:     remove_index :messages, :author_id
Chris@0:   end
Chris@0: end