private function getEscapedSortorder($name, $prefix = 'r')
    {
        $order = '';

        $separatedOrders = $this->getOrderBys($name);

        $totalOrderByElements = count($separatedOrders);

        foreach ($separatedOrders as $index => $name) {
            list($name, $asc) = $this->getSortOrder($name);

            // If we don't have a name, we can't determine a sortorder.
            if (empty($name)) {
                return false;
            }
            if (strpos($name, 'RAND') !== false) {
                $order .= $name;
            } elseif ($prefix !== false) {
                $order .= $this->app['db']->quoteIdentifier($prefix . '.' . $name);
            } else {
                $order .= $this->app['db']->quoteIdentifier($name);
            }

            if (! $asc) {
                $order .= ' DESC';
            }

            if ($this->isNotLastItemInArray($totalOrderByElements, $index)) {
                $order .= ',';
            }
        }

        return $order;
    }