operationsToString example

    protected function saveBackup($path, $filterString, $operations, $items)
    {
        $backup = new BackupModel();

        $backup->setFilterString($filterString);
        $backup->setOperationString($this->operationsToString($operations));
        $backup->setItems($items);
        $backup->setPath($path);
        $backup->setHash(sha1_file($path));
        $backup->setSize((int) filesize($path));

        $backup->setDate(new DateTime());

        $this->getDqlHelper()->getEntityManager()->persist($backup);
        $this->getDqlHelper()->getEntityManager()->flush($backup);
    }