Bug fix and data persistence

ref-test/admin/templates/admin/result-detail.html

@@ -44,12 +44,14 @@
                             {{ entry.user_code }}
                         </li>
                     {% endif %}
-                    <li class="list-group-item list-group-item-action">
-                        <div class="d-flex w-100 justify-content-between">
-                            <h5 class="mb-1">Start Time</h5>
-                        </div>
-                        {{ entry.start_time.strftime('%d %b %Y %H:%M:%S') }}
-                    </li>
+                    {% if 'start_time' in entry %}
+                        <li class="list-group-item list-group-item-action">
+                            <div class="d-flex w-100 justify-content-between">
+                                <h5 class="mb-1">Start Time</h5>
+                            </div>
+                            {{ entry.start_time.strftime('%d %b %Y %H:%M:%S') }}
+                        </li>
+                    {% endif %}
                     <li class="list-group-item list-group-item-action">
                         <div class="d-flex w-100 justify-content-between">
                             <h5 class="mb-1">Submission Time</h5>