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Raise an exception instead of returning None

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This commit is contained in:
Andrew Morgan 2019-01-31 18:34:15 +00:00
parent 3ed3cb4339
commit d239f67c25
1 changed files with 9 additions and 2 deletions
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11
synapse/storage/state.py
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@ -24,6 +24,7 @@ import attr
from twisted.internet import defer
from synapse.api.constants import EventTypes
from synapse.api.errors import NotFoundError
from synapse.storage._base import SQLBaseStore
from synapse.storage.background_updates import BackgroundUpdateStore
from synapse.storage.engines import PostgresEngine
@ -442,6 +443,9 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
Returns:
Deferred[unicode|None]: predecessor room id
Raises:
NotFoundError if the room is unknown
"""
# Retrieve the room's create event
create_event = yield self.get_create_event_for_room(room_id)
@ -457,14 +461,17 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore):
room_id (str)
Returns:
Deferred[EventBase|None]: The room creation event. None if can not be found
Deferred[EventBase]: The room creation event.
Raises:
NotFoundError if the room is unknown
"""
state_ids = yield self.get_current_state_ids(room_id)
create_id = state_ids.get((EventTypes.Create, ""))
# If we can't find the create event, assume we've hit a dead end
if not create_id:
defer.returnValue(None)
raise NotFoundError("Unknown room %s" % (room_id))
# Retrieve the room's create event and return
create_event = yield self.get_event(create_id)