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FIX: correctly update replies_count on chat_threads (#24711)

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The previous query would look at the existing messages, count them, and update the associated thread.

But, if for some reason messages were **ALL** deleted without updating the `replies_count`, then the query wouldn't find any message, and wouldn't update any thread's `replies_count`.
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Joffrey JAFFEUX 2023-12-05 13:46:58 +01:00 committed by GitHub
parent 707acbe696
commit c5aa6b5e16
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1 changed files with 9 additions and 10 deletions
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19
plugins/chat/app/models/chat/thread.rb
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@ -126,17 +126,16 @@ module Chat
# It is updated eventually via Jobs::Chat::PeriodicalUpdates. In
# future we may want to update this more frequently.
updated_thread_ids = DB.query_single <<~SQL
UPDATE chat_threads threads
SET replies_count = subquery.replies_count
UPDATE chat_threads ct
SET replies_count = GREATEST(COALESCE(subquery.new_count, 0), 0)
FROM (
SELECT COUNT(*) - 1 AS replies_count, thread_id
FROM chat_messages
WHERE chat_messages.deleted_at IS NULL AND thread_id IS NOT NULL
GROUP BY thread_id
) subquery
WHERE threads.id = subquery.thread_id
AND subquery.replies_count != threads.replies_count
RETURNING threads.id AS thread_id;
SELECT cm.thread_id, COUNT(cm.*) - 1 AS new_count
FROM chat_threads
LEFT JOIN chat_messages cm ON cm.thread_id = chat_threads.id AND cm.deleted_at IS NULL
GROUP BY cm.thread_id
) AS subquery
WHERE ct.id = subquery.thread_id AND ct.replies_count IS DISTINCT FROM GREATEST(COALESCE(subquery.new_count, 0), 0)
RETURNING ct.id AS thread_id
SQL
return if updated_thread_ids.empty?
self.clear_caches!(updated_thread_ids)