public function rebuild($parentId = null, $leftId = 0, $level = 0, $path = '')
{
if (!$parentId) {
// If root not exists, create one.
$table = JTable::getInstance('Queue', 'WebgalleryTable');
if (!$table->load(1)) {
$k = $this->_tbl_key;
$table->reset();
$table->{$k} = 1;
$table->title = 'ROOT';
$table->alias = 'root';
$table->catid = 1;
$table->_db->insertObject($this->_tbl, $table);
$table->reset();
$table->{$k} = null;
}
// If cloumn ordering exists, we need clear it, or nested sorting can't work.
if (property_exists($this, 'ordering')) {
$db = JFactory::getDbo();
$q = $db->getQuery(true);
$q->update($this->_tbl)->set('ordering = 0');
$db->setQuery($q);
$db->execute();
}
}
return parent::rebuild($parentId, $leftId, $level, $path);
}