public function get_all_submissions($userid) {
        global $DB, $USER;

        // If the userid is not null then use userid.
        if (!$userid) {
            $userid = $USER->id;
        }

        $params = array();

        if ($this->get_instance()->teamsubmission) {
            $groupid = 0;
            $group = $this->get_submission_group($userid);
            if ($group) {
                $groupid = $group->id;
            }

            // Params to get the group submissions.
            $params = array('assignment'=>$this->get_instance()->id, 'groupid'=>$groupid, 'userid'=>0);
        } else {
            // Params to get the user submissions.
            $params = array('assignment'=>$this->get_instance()->id, 'userid'=>$userid);
        }

        // Return the submissions ordered by attempt.
        $submissions = $DB->get_records('assign_submission', $params, 'attemptnumber ASC');

        return $submissions;
    }