/**
* Fetch Katz's which this Hulpverleners references.
* `hulpverleners`.`id` -> `katz`.`hvl_id`
*
* @param PDO $db a PDO Database instance
* @param array $sort array of DSC instances
* @return Katz[]
*/
public function fetchKatzCollection(PDO $db, $sort = null)
{
$filter = array(Katz::FIELD_HVL_ID => $this->getId());
return Katz::findByFilter($db, $filter, true, $sort);
}
/**
* Fetch Katz which references this Overlegbasis. Will return null in case reference is invalid.
* `overlegbasis`.`katz_id` -> `katz`.`id`
*
* @param PDO $db a PDO Database instance
* @param array $sort array of DSC instances
* @return Katz
*/
public function fetchKatz(PDO $db, $sort = null)
{
$filter = array(Katz::FIELD_ID => $this->getKatzId());
$result = Katz::findByFilter($db, $filter, true, $sort);
return empty($result) ? null : $result[0];
}
