public function getByItinerary(\Buggl\MainBundle\Entity\Itinerary $itinerary, $period_of_day = 0, $limit = 0, $offset = 0)
 {
     $sql = "SELECT itsd.*  \n\t\t\t\t\tFROM itinerary_to_spot_detail itsd\n\t\t\t\t\tWHERE 1\n\t\t\t\t\t\tAND itsd.itinerary_id = ?\n\t\t\t\t\t\tAND itsd.period_of_day = ?\n\t\t\t\t\t";
     if ($limit > 0) {
         $sql .= "LIMIT ?, ?";
         $params = array($itinerary->getId(), $period_of_day, $offset, $limit);
     } else {
         $params = array($itinerary->getId(), $period_of_day);
     }
     $em = $this->getEntityManager();
     $rsm = new ResultSetMappingBuilder($em);
     $rsm->addRootEntityFromClassMetadata('BugglMainBundle:ItineraryToSpotDetail', 'itsd');
     $query = $this->_em->createNativeQuery($sql, $rsm);
     $query->setParameters($params);
     $result = $query->getResult();
     return $result;
 }