public function saveData($searchString)
{
// get IP and actual Date
$ip = $this->request->getRemoteAddress();
// get datetime
$date = new \DateTime();
// new gneral entity
$search = new Search();
$search->setSearch($searchString);
$search->setDate($date);
$search->setIp($ip);
$this->em->persist($search);
return $search;
}