/**
* Inserts a new row.
*
* Columns must be in underscore format.
*
* @param array $data Column-value pairs.
* @param string $where An SQL WHERE clause.
* @return int The last insert ID.
*/
public function insert(&$data)
{
$this->_db->insert($this->_name, $data);
return $this->_db->lastInsertId($this->_name, $this->_primary);
}