function delete()
{
$workspace_billings = WorkspaceBillings::find(array('conditions' => 'billing_id = ' . $this->getId()));
if ($workspace_billings) {
foreach ($workspace_billings as $billing) {
$billing->delete();
}
}
$users = $this->getCategoryUsers();
if ($users) {
foreach ($users as $user) {
$user->setDefaultBillingId(0);
$user->save();
}
}
parent::delete();
}
