migration = $factory; } public function getMigrations(Updater $updater) { return array( $this->migration->db->changeColumnTypes('log_visit', array( 'config_os_version' => 'VARCHAR( 100 ) DEFAULT NULL', 'config_device_type' => 'VARCHAR( 100 ) DEFAULT NULL' )) ); } static function isMajorUpdate() { return true; } public function doUpdate(Updater $updater) { $updater->executeMigrations(__FILE__, $this->getMigrations($updater)); } }