fix issue where bulk actions would return, not raise 404

return Http404 -> raise Http404
See #7911

CHANGELOG.txt

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+2.15.4 (xx.xx.xxxx) - IN DEVELOPMENT
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+* Fix issue where invalid bulk action URLs would incorrectly trigger a server error (500) instead of a valid not found (404) (Ihor Marhitych)
+
+
 2.15.3 (26.01.2022)
 ~~~~~~~~~~~~~~~~~~~
 

docs/releases/2.15.4.rst

@@ -0,0 +1,16 @@
+=============================================
+Wagtail 2.15.4 release notes - IN DEVELOPMENT
+=============================================
+
+.. contents::
+    :local:
+    :depth: 1
+
+
+What's new
+==========
+
+Bug fixes
+~~~~~~~~~
+
+ * Fix issue where invalid bulk action URLs would incorrectly trigger a server error (500) instead of a valid not found (404) (Ihor Marhitych)

docs/releases/index.rst

@@ -5,6 +5,7 @@ Release notes
    :maxdepth: 1
 
    upgrading
+   2.15.4
    2.15.3
    2.15.2
    2.15.1

wagtail/admin/tests/pages/test_bulk_actions/test_bulk_action.py

@@ -0,0 +1,16 @@
+from django.test import TestCase
+from django.urls import reverse
+
+from wagtail.tests.utils import WagtailTestUtils
+
+
+class TestBulkActionDispatcher(TestCase, WagtailTestUtils):
+    def setUp(self):
+
+        # Login
+        self.user = self.login()
+
+    def test_bulk_action_invalid_action(self):
+        url = reverse('wagtail_bulk_action', args=('wagtailcore', 'page', 'ships', ))
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 404)

wagtail/admin/views/bulk_action/dispatcher.py

@@ -1,5 +1,5 @@
 from django.apps import apps
-from django.http.response import Http404
+from django.http import Http404
 
 from wagtail.admin.views.bulk_action.registry import bulk_action_registry as registry
 
@@ -9,4 +9,4 @@ def index(request, app_label, model_name, action):
     action_class = registry.get_bulk_action_class(app_label, model_name, action)
     if action_class is not None:
         return action_class(request, model).dispatch(request)
-    return Http404()
+    raise Http404