Chris@0: class AddMissingIndexesToWatchers < ActiveRecord::Migration
Chris@0:   def self.up
Chris@0:     add_index :watchers, :user_id
Chris@0:     add_index :watchers, [:watchable_id, :watchable_type]
Chris@0:   end
Chris@0: 
Chris@0:   def self.down
Chris@0:     remove_index :watchers, :user_id
Chris@0:     remove_index :watchers, :column => [:watchable_id, :watchable_type]
Chris@0:   end
Chris@0: end