Read history for a particular category

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1

Is there a way to write this specific query:

  • For topics in category (category id: 34) viewed by user(s) not in group (executive_board)
    • Display user, display topic, display when viewed.
Is it possible to get a list of topics in a category read by a specific user?
2

面白いことに、これは自動的に更新されました。そして、誰かが答えを持っていると私が望むほど、再び関連性があります。

「いいね！」 1
3

はい、この件についてはしばらくお待ちいただいていたようですね。:slight_smile:

このようなもので対応できるかと思います。（group_id = 3 の部分を、executive_board の group_id に置き換える必要があります）

SELECT tu.user_id,
       tu.topic_id,
       tu.last_read_post_number,
       tu.last_visited_at AS read
FROM topics t
LEFT OUTER JOIN topic_users tu ON t.id = tu.topic_id
WHERE tu.user_id NOT IN (SELECT user_id
    FROM group_users
    WHERE group_id = 3)
AND t.category_id = 34
AND tu.last_visited_at IS NOT NULL
ORDER BY tu.last_visited_at DESC
「いいね！」 1
4

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