Chris@0: class AddMissingIndexesToAttachments < ActiveRecord::Migration
Chris@0:   def self.up
Chris@0:     add_index :attachments, [:container_id, :container_type]
Chris@0:     add_index :attachments, :author_id
Chris@0:   end
Chris@0: 
Chris@0:   def self.down
Chris@0:     remove_index :attachments, :column => [:container_id, :container_type]
Chris@0:     remove_index :attachments, :author_id
Chris@0:   end
Chris@0: end