FOF30\Model\TreeModel::insertRightOf PHP Méthode

    public function insertRightOf(TreeModel &$siblingNode)
    {
        if ($siblingNode->lft >= $siblingNode->rgt) {
            throw new TreeInvalidLftRgtSibling();
        }
        // Get a reference to the database
        $db = $this->getDbo();
        // Get the field names
        $fldRgt = $db->qn($this->getFieldAlias('rgt'));
        $fldLft = $db->qn($this->getFieldAlias('lft'));
        // Nullify the PK, so a new record will be created
        $this->{$this->idFieldName} = null;
        // Get the value of the parent node's lft
        $myRight = $siblingNode->rgt;
        // Update my lft/rgt values
        $this->lft = $myRight + 1;
        $this->rgt = $myRight + 2;
        $db->transactionStart();
        try {
            $db->setQuery($db->getQuery(true)->update($db->qn($this->tableName))->set($fldRgt . ' = ' . $fldRgt . '+2')->where($fldRgt . ' > ' . $db->q($myRight)))->execute();
            $db->setQuery($db->getQuery(true)->update($db->qn($this->tableName))->set($fldLft . ' = ' . $fldLft . '+2')->where($fldLft . ' > ' . $db->q($myRight)))->execute();
            $this->save();
            // Commit the transaction
            $db->transactionCommit();
        } catch (\Exception $e) {
            $db->transactionRollback();
            throw $e;
        }
        return $this;
    }