This question has been answered by Bruno17. See the first response.
@EVAL return $modx->runSnippet('Peoples',array('tpl'=>'peoplesTpl','outputSeparator'=>'||','active'=>'1'));[[+fullname]]==[[+id]]
switch ($modx->event->name) {
case 'onDocFormSave':
$created_by = $resource->getTVValue('setCreatedBy')
if ($resource->get('createdby') != $created_by) {
$modx->resource->set('createdby', $created_by));
}
break;
}
switch ($modx->event->name) {
case 'OnDocFormSave':
$created_by = $resource->getTVValue('setCreatedBy');
if (!empty($created_by) && $resource->get('createdby') != $created_by) {
$resource->set('createdby', $created_by);
$resource->save();
}
break;
}