Initial change: Allow prefetch and selection of related data on Page object, for EditView

wagtail/admin/views/pages/edit.py

@@ -333,6 +333,15 @@ class EditView(WagtailAdminTemplateMixin, HookResponseMixin, View):
         self.scheduled_revision = self.real_page_record.scheduled_revision
         self.page_content_type = self.real_page_record.cached_content_type
         self.page_class = self.real_page_record.specific_class
+        self.prefetch_related = self.page_class.prefetch_related
+        self.select_related = self.page_class.select_related
+        self.real_page_record = get_object_or_404(
+            self.page_class.objects.select_related(
+                *self.select_related,
+            ).prefetch_related(
+                *self.prefetch_related,
+            ),
+        )
 
         if self.page_class is None:
             raise PageClassNotFoundError(

wagtail/models/pages.py

@@ -479,6 +479,10 @@ class Page(AbstractPage, index.Indexed, ClusterableModel, metaclass=PageBase):
         HTTPMethod.PUT,
     ]
 
+    # Allows prefetching of related objects for admin views
+    prefetch_related_objects = []
+    select_related_objects = []
+
     @staticmethod
     def route_for_request(request: HttpRequest, path: str) -> RouteResult | None:
         """