protected function _execute(array $params)
 {
     if (!Migration::is_installed()) {
         Migration::install();
     }
     if (Migration::generate($params['name'], $params['columns']) === TRUE) {
         Minion_CLI::write('Migration \'' . $params['name'] . '\' was succefully created');
     } else {
         Minion_CLI::write('An error occured while creating migration \'' . $params['name'] . '\'');
     }
 }
 protected function _execute(array $params)
 {
     if (!Migration::is_installed()) {
         Migration::install();
     }
     Migration::migrate_all($messages);
     if (empty($messages)) {
         Minion_CLI::write('Nothing to migrate');
     } else {
         foreach ($messages as $message) {
             Minion_CLI::write($message[0]);
             if (isset($message[1])) {
                 Minion_CLI::write('ERROR: ' . $message[1]);
             } else {
                 Minion_CLI::write('OK');
             }
         }
     }
 }