/**
* Joins a ProjectActivity to it's external reference in a Doctrine Query.
*
* @param AIR2_Query $q
* @param string $alias
*/
public static function joinRelated($q, $alias)
{
$a = $alias ? "{$alias}." : "";
ProjectActivity::setupRelated();
$q->leftJoin("{$a}Organization WITH {$a}pa_ref_type = ?", self::$REF_TYPE_ORG);
$q->leftJoin("{$a}Inquiry WITH {$a}pa_ref_type = ?", self::$REF_TYPE_INQ);
}