+ $c = clone ($this);
+ print_R($this);exit;
+ $c->autoJoin();
+ if (is_array($pr)) {
+ $c->whereAddIn('project_id', $pr, 'int');
+ } else {
+ $c->project_id = $pr->id;
+ }
+ $c->selectAdd();
+ $c->selectAdd('person_id');
+ return $c->fetchAll('person_id');
+
+