public function truncate()
{
parent::truncate();
if (!$this->getParent()) {
// add timezones
$params = array_keys($this->nativeTZList());
$sql = "INSERT INTO {$this->getTableName()} ({$this->sender()->valueField()}) VALUES(" . implode('),(', array_fill(0, count($params), '?')) . ")";
$this->db()->fetchAll($sql, $params);
}
}
