/**
* Fetches the records according to the query and the display mode.
*
* The method is overrode if the dispay mode is `tree` in which case the records are fetched
* accroding to their relashion and the _expand_ state of their parent.
*/
protected function fetch_records(Query $query)
{
global $core;
if ($this->mode !== 'tree') {
return parent::fetch_records($query);
}
$expanded = array_flip($this->options->expanded);
return $query->model->blueprint($core->site_id)->subset(null, null, function (BlueprintNode $node) use($expanded) {
return !(!$node->parentid || isset($expanded[$node->parentid]));
})->ordered_records;
}
