protected function _buildQueryOrder(KDatabaseQueryInterface $query)
{
$sort = $this->getState()->sort;
$direction = strtoupper($this->getState()->direction);
if ($sort) {
$column = $this->getTable()->mapColumns($sort);
if (array_key_exists($column, $this->getTable()->getColumns())) {
$query->order($column, $direction);
}
}
}
