public function action($argv)
 {
     $command = $argv[1];
     if ($command == 'migrate' || $command == '-m') {
         $migration = new Migration();
         $migration->up();
     } elseif ($command == 'rollback' || $command == '-r') {
         $migration = new Migration();
         $migration->rollback();
     } elseif ($command == 'status' || $command == '-s') {
         $migration = new Migration();
         $migration->printStatus();
     } elseif ($command === 'help' || $command == '-h') {
         Debug::out('Command: -h (help)');
         Debug::out('migrate or -m');
         Debug::out('rollback or -r');
         Debug::out('status or -s');
     } else {
         Debug::out('Command unknown. Try -h for help.');
     }
 }