CommonDevice::canUnrecurs PHP Метод

    function canUnrecurs()
    {
        global $DB;
        $ID = $this->fields['id'];
        if ($ID < 0 || !$this->fields['is_recursive']) {
            return true;
        }
        if (!parent::canUnrecurs()) {
            return false;
        }
        $entities = getAncestorsOf("glpi_entities", $this->fields['entities_id']);
        $entities[] = $this->fields['entities_id'];
        // RELATION : device -> item_device -> item
        $linktype = static::getItem_DeviceType();
        $linktable = getTableForItemType($linktype);
        $sql = "SELECT `itemtype`,\n                     GROUP_CONCAT(DISTINCT `items_id`) AS ids\n              FROM `{$linktable}`\n              WHERE `{$linktable}`.`" . $this->getForeignKeyField() . "` = '{$ID}'\n              GROUP BY `itemtype`";
        foreach ($DB->request($sql) as $data) {
            if (!empty($data["itemtype"])) {
                $itemtable = getTableForItemType($data["itemtype"]);
                if ($item = getItemForItemtype($data["itemtype"])) {
                    // For each itemtype which are entity dependant
                    if ($item->isEntityAssign()) {
                        if (countElementsInTable($itemtable, ['id' => $data["ids"], 'NOT' => ['entities_id' => $entities]]) > 0) {
                            return false;
                        }
                    }
                }
            }
        }
        return true;
    }