version() 공개 메소드

Calls each migration step required to get to the schema version of choice
public version ( string $target_version ) : mixed
$target_version string Target schema version
리턴 mixed TRUE if no migrations are found, current version string on success, FALSE on failure
CI_Migration 1 문서
예제 #1
0
 /**
  * Extends migration mechanism to create backup before running migrations and remove it on success, but keep on failure
  * (non-PHPdoc)
  * @see CI_Migration::version()
  */
 public function version($target_version)
 {
     // Make DB backup
     $backupFile = $this->_make_backup();
     if ($backupFile === FALSE) {
         log_message('DEBUG', 'Making backup before migrating failed.');
     }
     // Run migrationgs
     $migrationsResult = parent::version($target_version);
     // If everything went well - remove backup
     if ($migrationsResult !== FALSE && $migrationsResult == $target_version) {
         if ($backupFile !== FALSE && !$this->_delete_backup($backupFile)) {
             log_message('debug', 'There was an error when removing backup file.');
         }
     } else {
         if ($backupFile !== FALSE) {
             log_message('error', 'Migrating to version ' . $target_version . ' failed. Backup from before migration stored in ' . $backupFile);
         } else {
             log_message('error', 'Migrating to version ' . $target_version . ' failed, but no valid backup saved.');
         }
     }
     return $migrationsResult;
 }