public function afterValidate()
{
$one_of = array('site_id', 'subspecialty_id', 'firm_id');
$found = false;
foreach ($one_of as $attr) {
if ($this->{$attr}) {
$found = true;
}
}
if (!$found) {
$this->addError(null, 'At least one of ' . implode(', ', array_map(function ($attr) {
return $this->getAttributeLabel($attr);
}, $one_of)) . ' must be set.');
}
parent::afterValidate();
}
