redmine/db/migrate/20091220183509_add_lft_and_rgt_indexes_to_projects.rb

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class AddLftAndRgtIndexesToProjects < ActiveRecord::Migration
def self.up
add_index :projects, :lft
add_index :projects, :rgt
end
def self.down
remove_index :projects, :lft
remove_index :projects, :rgt
end
end