From d0c713cc85f094c323b2ba3f02d8ac411a7f0705 Mon Sep 17 00:00:00 2001 From: Sean Quah <8349537+squahtx@users.noreply.github.com> Date: Fri, 10 Feb 2023 23:29:00 +0000 Subject: Return read-only collections from `@cached` methods (#13755) It's important that collections returned from `@cached` methods are not modified, otherwise future retrievals from the cache will return the modified collection. This applies to the return values from `@cached` methods and the values inside the dictionaries returned by `@cachedList` methods. It's not necessary for the dictionaries returned by `@cachedList` methods themselves to be read-only. Signed-off-by: Sean Quah Co-authored-by: David Robertson --- synapse/state/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'synapse/state/__init__.py') diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py index e877e6f1a1..4dc25df67e 100644 --- a/synapse/state/__init__.py +++ b/synapse/state/__init__.py @@ -226,7 +226,7 @@ class StateHandler: return await ret.get_state(self._state_storage_controller, state_filter) async def get_current_user_ids_in_room( - self, room_id: str, latest_event_ids: List[str] + self, room_id: str, latest_event_ids: Collection[str] ) -> Set[str]: """ Get the users IDs who are currently in a room. -- cgit 1.4.1