diff options
| -rw-r--r-- | changelog.d/11188.bugfix | 1 | ||||
| -rw-r--r-- | synapse/rest/client/room_batch.py | 29 |
2 files changed, 18 insertions, 12 deletions
diff --git a/changelog.d/11188.bugfix b/changelog.d/11188.bugfix new file mode 100644 index 0000000000..0688743c00 --- /dev/null +++ b/changelog.d/11188.bugfix @@ -0,0 +1 @@ +Allow an empty list of `state_events_at_start` to be sent when using the [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716) `/batch_send` endpoint and the author of the historical messages is already part of the current room state at the given `?prev_event_id`. diff --git a/synapse/rest/client/room_batch.py b/synapse/rest/client/room_batch.py index ab9a743bba..46f033eee2 100644 --- a/synapse/rest/client/room_batch.py +++ b/synapse/rest/client/room_batch.py @@ -131,20 +131,22 @@ class RoomBatchSendEventRestServlet(RestServlet): prev_event_ids_from_query ) + state_event_ids_at_start = [] # Create and persist all of the state events that float off on their own # before the batch. These will most likely be all of the invite/member # state events used to auth the upcoming historical messages. - state_event_ids_at_start = ( - await self.room_batch_handler.persist_state_events_at_start( - state_events_at_start=body["state_events_at_start"], - room_id=room_id, - initial_auth_event_ids=auth_event_ids, - app_service_requester=requester, + if body["state_events_at_start"]: + state_event_ids_at_start = ( + await self.room_batch_handler.persist_state_events_at_start( + state_events_at_start=body["state_events_at_start"], + room_id=room_id, + initial_auth_event_ids=auth_event_ids, + app_service_requester=requester, + ) ) - ) - # Update our ongoing auth event ID list with all of the new state we - # just created - auth_event_ids.extend(state_event_ids_at_start) + # Update our ongoing auth event ID list with all of the new state we + # just created + auth_event_ids.extend(state_event_ids_at_start) inherited_depth = await self.room_batch_handler.inherit_depth_from_prev_ids( prev_event_ids_from_query @@ -197,8 +199,11 @@ class RoomBatchSendEventRestServlet(RestServlet): # Also connect the historical event chain to the end of the floating # state chain, which causes the HS to ask for the state at the start of - # the batch later. - prev_event_ids = [state_event_ids_at_start[-1]] + # the batch later. If there is no state chain to connect to, just make + # the insertion event float itself. + prev_event_ids = [] + if len(state_event_ids_at_start): + prev_event_ids = [state_event_ids_at_start[-1]] # Create and persist all of the historical events as well as insertion # and batch meta events to make the batch navigable in the DAG. |