Looks like delete_multi is broken for the redis backend.

We could optimize this in the future by implementing it ourselves

src/onegov/core/orm/cache.py

@@ -139,8 +139,8 @@ def handle_orm_change(schema: str, obj: 'Base') -> None:
                 #
                 # Still, trust but verify:
                 assert self.schema == schema
-                self.cache.delete_multi(list(descriptor.used_cache_keys))
                 for cache_key in descriptor.used_cache_keys:
+                    self.cache.delete(cache_key)
                     if cache_key in self.request_cache:
                         del self.request_cache[cache_key]
 

src/onegov/org/views/editor.py

@@ -268,14 +268,10 @@ def count_page(page: 'Page') -> None:
             #        a change in the pages tables, which in turn
             #        will clear these caches. But I suppose it doesn't
             #        hurt to clear them twice...
-            request.app.cache.delete_multi([
-                getattr(request.__class__, prop_name).used_cache_keys
-                for prop_name in (
-                    'root_pages',
-                    'pages_tree',
-                    'homepage_pages'
-                )
-            ])
+            for prop_name in ('root_pages', 'pages_tree', 'homepage_pages'):
+                prop = getattr(request.__class__, prop_name)
+                for cache_key in prop.used_cache_keys:
+                    request.app.cache.delete(cache_key)
             request.success(_('Your changes were saved'))
 
             @request.after