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Workaround for non-uniqueness of room member events in the database confusing HAVING COUNT() test of room membership intersection (with thanks to Tom Molesworth)
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1 changed files with 3 additions and 1 deletions
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@ -218,7 +218,9 @@ class RoomMemberStore(SQLBaseStore):
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"ON m.event_id = c.event_id "
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"WHERE m.membership = 'join' "
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"AND (%(clause)s) "
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"GROUP BY m.room_id HAVING COUNT(m.room_id) = ?"
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# TODO(paul): We've got duplicate rows in the database somewhere
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# so we have to DISTINCT m.user_id here
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"GROUP BY m.room_id HAVING COUNT(DISTINCT m.user_id) = ?"
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) % {"clause": user_list_clause}
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args = list(user_id_list)
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