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Properly paginate forward in the /relations API. (#13840)

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This fixes a bug where the `/relations` API with `dir=f` would
skip the first item of each page (except the first page), causing
incomplete data to be returned to the client.
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Patrick Cloke 2022-09-22 08:47:49 -04:00 • committed by GitHub
parent 1a1abdda42
commit b7272b73aa
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4 changed files with 60 additions and 14 deletions
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6
synapse/storage/databases/main/stream.py
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@ -1334,15 +1334,15 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
if rows:
topo = rows[-1].topological_ordering
toke = rows[-1].stream_ordering
token = rows[-1].stream_ordering
if direction == "b":
# Tokens are positions between events.
# This token points *after* the last event in the chunk.
# We need it to point to the event before it in the chunk
# when we are going backwards so we subtract one from the
# stream part.
toke -= 1
next_token = RoomStreamToken(topo, toke)
token -= 1
next_token = RoomStreamToken(topo, token)
else:
# TODO (erikj): We should work out what to do here instead.
next_token = to_token if to_token else from_token