/**
* Fetch Evalinstr which references this Overlegbasis. Will return null in case reference is invalid.
* `overlegbasis`.`evalinstr_id` -> `evalinstr`.`ei_id`
*
* @param PDO $db a PDO Database instance
* @param array $sort array of DSC instances
* @return Evalinstr
*/
public function fetchEvalinstr(PDO $db, $sort = null)
{
$filter = array(Evalinstr::FIELD_EI_ID => $this->getEvalinstrId());
$result = Evalinstr::findByFilter($db, $filter, true, $sort);
return empty($result) ? null : $result[0];
}
/**
* get single Evalinstr instance from a DOMElement
*
* @param DOMElement $node
* @return Evalinstr
*/
public static function fromDOMElement(DOMElement $node)
{
$o = new Evalinstr();
$o->assignByHash(self::domNodeToHash($node, self::$FIELD_NAMES, self::$DEFAULT_VALUES, self::$FIELD_TYPES));
$o->notifyPristine();
return $o;
}