.

atlas/models.py

@@ -473,6 +473,7 @@ class SeriesImage(SeriesImageBase):
 
     replaced = models.ForeignKey(
         "self",
+        on_delete=models.SET_NULL,
         null=True,
         blank=True,
         help_text="Reference to the object that has replaced this one.",

generic/templates/generic/user_view.html

@@ -6,6 +6,7 @@
 {% endblock %}
 
 {% block content %}
+    <a href='{% url "trainees" %}'>Trainees list</a>
 
     <div id="view-filter-options">
         <details class="filter">
@@ -19,6 +20,7 @@
         </details>
     </div>
 
+
     <details class="bulk-edit">
         <summary>
             Bulk edit