+       /**
+        * Find one session by location and user id within last month
+        *
+        * @param $location The location id
+        * @param $user The user id
+        */
+       public function findOneWithinLastMonthByLocationUser($location, $user) {
+               //Get entity manager
+               $em = $this->getEntityManager();
+
+               //Get quote strategy
+               $qs = $em->getConfiguration()->getQuoteStrategy();
+               $dp = $em->getConnection()->getDatabasePlatform();
+
+               //Get quoted table names
+               //XXX: this allow to make this code table name independent
+               $tables = [
+                       'RapsysAirBundle:Session' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Session'), $dp),
+                       'RapsysAirBundle:Application' => $qs->getTableName($em->getClassMetadata('RapsysAirBundle:Application'), $dp),
+                       "\t" => '',
+                       "\n" => ' '
+               ];
+
+               //Set the request
+               //XXX: give the gooddelay to guest just in case
+               $req =<<<SQL
+SELECT s.id
+FROM RapsysAirBundle:Session s
+JOIN RapsysAirBundle:Application a ON (a.id = s.application_id AND a.user_id = :uid AND (a.canceled IS NULL OR TIMESTAMPDIFF(DAY, a.canceled, ADDTIME(s.date, s.begin)) < 1))
+WHERE s.location_id = :lid AND s.date >= DATE_ADD(DATE_SUB(NOW(), INTERVAL 1 MONTH), INTERVAL :gooddelay DAY)
+SQL;
+
+               //Replace bundle entity name by table name
+               $req = str_replace(array_keys($tables), array_values($tables), $req);
+
+               //Get result set mapping instance
+               $rsm = new ResultSetMapping();
+
+               //Declare all fields
+               //XXX: see vendor/doctrine/dbal/lib/Doctrine/DBAL/Types/Types.php
+               $rsm->addScalarResult('id', 'id', 'integer')
+                       ->addIndexByScalar('id');
+
+               //Return result
+               return $em
+                       ->createNativeQuery($req, $rsm)
+                       ->setParameter('lid', $location)
+                       ->setParameter('uid', $user)
+                       ->setParameter('gooddelay', self::GOOD_DELAY)
+                       ->getOneOrNullResult();
+       }
+