From eec9609e962c7fa623e9d09827ad3ffafeca1874 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Fri, 15 Jul 2016 10:22:09 +0100
Subject: [PATCH] event_backwards_extremeties may not be empty
---
synapse/storage/events.py | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index b582942164..59f8061333 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -1411,11 +1411,21 @@ class EventsStore(SQLBaseStore):
to_delete
)
+ txn.execute(
+ "SELECT event_id FROM event_backward_extremities WHERE room_id = ?",
+ (room_id,)
+ )
+
+ cur_back_event_ids = [event_id for event_id, in txn.fetchall()]
+
# Update backward extremeties
txn.executemany(
"INSERT INTO event_backward_extremities (room_id, event_id)"
" VALUES (?, ?)",
- [(room_id, event_id) for event_id, in new_backwards_extrems]
+ [
+ (room_id, event_id) for event_id, in new_backwards_extrems
+ if event_id not in cur_back_event_ids
+ ]
)
txn.executemany(
--
GitLab