when 'mysql', 'mysql2'
      dm.gsub!(/!DB_DEVELOPMENT!/,"\"mysql://root@localhost/#{db}_development\"")
      dm.gsub!(/!DB_PRODUCTION!/,"\"mysql://root@localhost/#{db}_production\"")
      dm.gsub!(/!DB_TEST!/,"\"mysql://root@localhost/#{db}_test\"")
      require_dependencies 'dm-mysql-adapter'