diff options
Diffstat (limited to 'synapse/handlers/_base.py')
| -rw-r--r-- | synapse/handlers/_base.py | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py index bdade98bf7..51bd1ee4de 100644 --- a/synapse/handlers/_base.py +++ b/synapse/handlers/_base.py @@ -199,8 +199,7 @@ class BaseHandler(object): # events in the room, because we don't know enough about the graph # fragment we received to treat it like a graph, so the above returned # no relevant events. It may have returned some events (if we have - # joined and left the room), but not useful ones, like the invite. So we - # forcibly set our context to the invite we received over federation. + # joined and left the room), but not useful ones, like the invite. if ( not self.is_host_in_room(context.current_state) and builder.type == EventTypes.Member @@ -208,7 +207,18 @@ class BaseHandler(object): prev_member_event = yield self.store.get_room_member( builder.sender, builder.room_id ) - if prev_member_event: + + # if we have the prev_member_event in context, we didn't receive + # the invite over federation. (More likely is that the inviting + # user, and all other local users, have left, making + # is_host_in_room return false). + # + context_events = (e.event_id for e in context.current_state.values()) + + if prev_member_event and not prev_member_event.event_id in context_events: + # The prev_member_event is missing from context, so it must + # have arrived over federation and is an outlier. We forcibly + # set our context to the invite we received over federation builder.prev_events = ( prev_member_event.event_id, prev_member_event.prev_events |