/**
* Attemps to set value of <code>$nested_categories</code> property
* @param Db object <code>$db</code>
*/
public function nested_categories(Db $db)
{
if (isset($this->id)) {
$this->nested_categories = NestedCategory::find($db, ['name', 'id', 'parent_id', 'gauche', 'droite'], "user_id = {$this->id}");
}
}
