Chris@909: class AddIndexOnIssuesNestedSet < ActiveRecord::Migration
Chris@909:   def self.up
Chris@909:     add_index :issues, [:root_id, :lft, :rgt]
Chris@909:   end
Chris@909: 
Chris@909:   def self.down
Chris@909:     remove_index :issues, [:root_id, :lft, :rgt]
Chris@909:   end
Chris@909: end