$cm = get_coursemodule_from_instance('assign', $assignment->id, 0, false, MUST_EXIST);
$link = html_writer::link(new moodle_url('/mod/assign/view.php', array('id' => $cm->id)), $assignment->name);
- $date = userdate($assignment->duedate);
- $submissions = $DB->count_records('assign_submission', array('assignment'=>$cm->instance));
+ $date = '-';
+ if (!empty($assignment->duedate)) {
+ $date = userdate($assignment->duedate);
+ }
+
+ $params = array('assignment'=>$cm->instance, 'status'=>ASSIGN_SUBMISSION_STATUS_SUBMITTED);
+ $submissions = $DB->count_records('assign_submission', $params);
$row = array($link, $date, $submissions);
$table->data[] = $row;