/**
* Returns the ordering value to place a new item last in its group
*
* @access public
* @param string query WHERE clause for selecting MAX(ordering).
*/
function getNextOrder($where = '')
{
if (!in_array('ordering', array_keys($this->getProperties()))) {
$this->setError(get_class($this) . ' does not support ordering');
return false;
}
$query = 'SELECT MAX(ordering)' . ' FROM ' . $this->_tbl . ($where ? ' WHERE ' . $where : '');
$this->_db->setQuery($query);
$maxord = $this->_db->loadResult();
if ($this->_db->getErrorNum()) {
$this->setError($this->_db->getErrorMsg());
return false;
}
return $maxord + 1;
}
