Mine

namespace :db do  namespace :purge do    desc "Purge expired sessions from the database"    task :sessions => :environment do      CGI::Session::ActiveRecordStore::Session.        destroy_all( ['updated_at <?', 2.hours.ago] )     end        desc "Purge expired PilotBriefings from the database"        task :pilot_briefings => :environment do      PilotBriefing.purge    end        desc "Deactivates (doesn't delete) non-admin, expired accounts"    task :users => :environment do      User.deactivate_expired_accounts!    end  endend