[1.7.x] Fixed #23898 -- Added missing context to admin's deleted_selected view.

Backport of 8e7b384d89 from master

django/contrib/admin/actions.py

@@ -63,16 +63,17 @@ def delete_selected(modeladmin, request, queryset):
     else:
         title = _("Are you sure?")
 
-    context = {
-        "title": title,
-        "objects_name": objects_name,
-        "deletable_objects": [deletable_objects],
-        'queryset': queryset,
-        "perms_lacking": perms_needed,
-        "protected": protected,
-        "opts": opts,
-        'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
-    }
+    context = dict(
+        modeladmin.admin_site.each_context(),
+        title=title,
+        objects_name=objects_name,
+        deletable_objects=[deletable_objects],
+        queryset=queryset,
+        perms_lacking=perms_needed,
+        protected=protected,
+        opts=opts,
+        action_checkbox_name=helpers.ACTION_CHECKBOX_NAME,
+    )
 
     # Display the confirmation page
     return TemplateResponse(request, modeladmin.delete_selected_confirmation_template or [

docs/releases/1.7.2.txt

@@ -80,3 +80,6 @@ Bugfixes
 
 * Fixed ``django.core.files.File.__repr__()`` when the file's ``name`` contains
   Unicode characters (:ticket:`23888`).
+
+* Added missing context to the admin's ``delete_selected`` view that prevented
+  custom site header, etc. from appearing (:ticket:`23898`).

tests/admin_views/tests.py

@@ -830,6 +830,7 @@ class AdminCustomTemplateTests(AdminViewBasicTestCase):
             '_selected_action': group.id
         }
         response = self.client.post('/test_admin/%s/auth/group/' % (self.urlbit), post_data)
+        self.assertEqual(response.context['site_header'], 'Django administration')
         self.assertContains(response, 'bodyclass_consistency_check ')
 
     def test_filter_with_custom_template(self):