Chris@0: class AddIndexOnIssuesNestedSet < ActiveRecord::Migration
Chris@0:   def self.up
Chris@0:     add_index :issues, [:root_id, :lft, :rgt]
Chris@0:   end
Chris@0: 
Chris@0:   def self.down
Chris@0:     remove_index :issues, [:root_id, :lft, :rgt]
Chris@0:   end
Chris@0: end