Add delete message

app/admin_ui/templates/api_app/canonical/published_detail.html

@@ -18,9 +18,11 @@ <h1 class="my-5">{{ object.short_name }}</h1>
       Edit
       </a>
     {% endif %}
-    <button class="btn btn-secondary" data-toggle="modal" data-target="#deletePopup">
-      Delete
-    </button>
+    {% if not is_delete_in_progress %}
+      <button class="btn btn-secondary" data-toggle="modal" data-target="#deletePopup">
+        Delete
+      </button>
+    {% endif %}
   </div>
 {% endblock actions %}
 

app/admin_ui/views/v2.py

@@ -1,6 +1,7 @@
 from typing import Dict
 
 from django.contrib.auth.decorators import login_required
+from django.contrib import messages
 from django.utils.decorators import method_decorator
 from django.views.generic.detail import DetailView
 from django.forms import modelform_factory
@@ -198,6 +199,11 @@ def get_context_data(self, **kwargs):
             "has_progress_draft": Change.objects.related_in_progress_drafts(
                 self.kwargs[self.pk_url_kwarg]
             ).exists(),
+            "is_delete_in_progress": Change.objects.related_in_progress_drafts(
+                self.kwargs[self.pk_url_kwarg]
+            )
+            .filter(action=Change.Actions.DELETE)
+            .exists(),
         }
 
 
@@ -221,6 +227,11 @@ def get_queryset(self):
         return Change.objects.all()
 
     def get(self, request, *args, **kwargs):
+        messages.add_message(
+            request,
+            messages.WARNING,
+            "Deletion in progress. Only after admin approval will the published version be removed.",
+        )
         self.object = self.get_object()
         in_progress_drafts = Change.objects.related_in_progress_drafts(
             self.kwargs["canonical_uuid"]