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Make pagination of rooms in admin api stable (#11737)

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Always add state.room_id after the configurable ORDER BY. Otherwise,
for any sort, certain pages can contain results from
other pages. (Especially when sorting by creator, since there may
be many rooms by the same creator)

* Document different order direction of numerical fields

"joined_members", "joined_local_members", "version" and "state_events"
are ordered in descending direction by default (dir=f). Added a note
in tests to explain the differences in ordering.

Signed-off-by: Daniël Sonck <daniel@sonck.nl>
This commit is contained in:
Daniel Sonck 2022-01-17 12:42:51 +01:00 • committed by GitHub
parent e7da1ced24
commit 6b241f5286
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3 changed files with 38 additions and 28 deletions
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18
synapse/storage/databases/main/room.py
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@ -551,24 +551,24 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
FROM room_stats_state state
INNER JOIN room_stats_current curr USING (room_id)
INNER JOIN rooms USING (room_id)
%s
ORDER BY %s %s
{where}
ORDER BY {order_by} {direction}, state.room_id {direction}
LIMIT ?
OFFSET ?
""" % (
where_statement,
order_by_column,
"ASC" if order_by_asc else "DESC",
""".format(
where=where_statement,
order_by=order_by_column,
direction="ASC" if order_by_asc else "DESC",
)
# Use a nested SELECT statement as SQL can't count(*) with an OFFSET
count_sql = """
SELECT count(*) FROM (
SELECT room_id FROM room_stats_state state
%s
{where}
) AS get_room_ids
""" % (
where_statement,
""".format(
where=where_statement,
)
def _get_rooms_paginate_txn(