Document_Item::pre_deleteItem PHP Méthode

    function pre_deleteItem()
    {
        global $DB;
        // fordocument mandatory
        if ($this->fields['itemtype'] == 'Ticket') {
            $ticket = new Ticket();
            $ticket->getFromDB($this->fields['items_id']);
            $tt = $ticket->getTicketTemplateToUse(0, $ticket->fields['type'], $ticket->fields['itilcategories_id'], $ticket->fields['entities_id']);
            if (isset($tt->mandatory['_documents_id'])) {
                // refuse delete if only one document
                if (countElementsInTable($this->getTable(), ['items_id' => $this->fields['items_id'], 'itemtype' => 'Ticket']) == 1) {
                    $message = sprintf(__('Mandatory fields are not filled. Please correct: %s'), _n('Document', 'Documents', 2));
                    Session::addMessageAfterRedirect($message, false, ERROR);
                    return false;
                }
            }
        }
        return true;
    }