public function isContactRequestExist(ContactRequest $contactRequest)
 {
     $q = $this->dao->prepare('SELECT * FROM ' . $this->table() . ' WHERE (USER_ID_TO = :userIdTo AND USER_ID_FROM = :userIdFrom) OR (USER_ID_TO = :userIdFrom AND USER_ID_FROM = :userIdTo)');
     $q->bindValue(':userIdTo', $contactRequest->getUserIdTo(), PDO::PARAM_INT);
     $q->bindValue(':userIdFrom', $contactRequest->getUserIdFrom(), PDO::PARAM_INT);
     $q->execute();
     $contactRequest = $q->fetch(PDO::FETCH_ASSOC);
     if (is_array($contactRequest)) {
         return true;
     }
     return false;
 }