Fix upgrading a room without `events` field in power levels (#16725)

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David Robertson 2023-12-05 12:06:21 +00:00 committed by GitHub
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3 changed files with 30 additions and 1 deletions

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changelog.d/16725.bugfix Normal file
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@ -0,0 +1 @@
Fix a bug introduced in Synapse 1.7.2 where rooms whose power levels lacked an `events` field could not be upgraded.

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@ -549,7 +549,7 @@ class RoomCreationHandler:
except (TypeError, ValueError):
ban = 50
needed_power_level = max(
state_default_int, ban, max(event_power_levels.values())
state_default_int, ban, max(event_power_levels.values(), default=0)
)
# Get the user's current power level, this matches the logic in get_user_power_level,

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@ -246,6 +246,34 @@ class UpgradeRoomTest(unittest.HomeserverTestCase):
# We should now have an integer power level.
self.assertEqual(new_power_levels["users"][self.creator], 100, new_power_levels)
def test_events_field_missing(self) -> None:
"""Regression test for https://github.com/matrix-org/synapse/issues/16715."""
# Create a new room.
room_id = self.helper.create_room_as(
self.creator, tok=self.creator_token, room_version="10"
)
self.helper.join(room_id, self.other, tok=self.other_token)
# Retrieve the room's current power levels.
power_levels = self.helper.get_state(
room_id,
"m.room.power_levels",
tok=self.creator_token,
)
# Remove the events field and re-set the power levels.
del power_levels["events"]
self.helper.send_state(
room_id,
"m.room.power_levels",
body=power_levels,
tok=self.creator_token,
)
# Upgrade the room. Check the homeserver reports success.
channel = self._upgrade_room(room_id=room_id)
self.assertEqual(200, channel.code, channel.result)
def test_space(self) -> None:
"""Test upgrading a space."""