Modify admin to allow listing history when instance has been deleted

Author: macro1

CHANGES.rst

@@ -1,6 +1,10 @@
 Changes
 =======
 
+tip (unreleased)
+----------------
+- Add ability to list history in admin when the object instance is deleted. (gh-72)
+
 1.6.3 (2015-07-30)
 ------------------
 - Respect `to_field` and `db_column` parameters (gh-182)

simple_history/admin.py

@@ -6,6 +6,7 @@
 from django.contrib.admin import helpers
 from django.contrib.contenttypes.models import ContentType
 from django.core.urlresolvers import reverse
+from django.http import Http404
 from django.shortcuts import get_object_or_404, render
 from django.utils.text import capfirst
 from django.utils.html import mark_safe
@@ -56,7 +57,13 @@ def history_view(self, request, object_id, extra_context=None):
         object_id = unquote(object_id)
         action_list = history.filter(**{pk_name: object_id})
         # If no history was found, see whether this object even exists.
-        obj = get_object_or_404(model, pk=object_id)
+        try:
+            obj = model.objects.get(**{pk_name: object_id})
+        except model.DoesNotExist:
+            try:
+                obj = action_list.latest('history_date').instance
+            except action_list.model.DoesNotExist:
+                raise Http404
         content_type = ContentType.objects.get_by_natural_key(
             *USER_NATURAL_KEY)
         admin_user_view = 'admin:%s_%s_change' % (content_type.app_label,