Tengo este SQL en la configuración de una insignia y otorga la insignia a cualquier persona que se agregue al grupo beta-testers:
SELECT u.id AS user_id, CURRENT_TIMESTAMP AS granted_at
FROM users u
INNER JOIN group_users gu ON gu.user_id = u.id
INNER JOIN groups g ON g.id = gu.group_id
WHERE g.name = 'beta-testers'
¿Puedo modificarlo para vincular la insignia también a un ID de tema específico?
SELECT
u.id AS user_id,
CURRENT_TIMESTAMP AS granted_at,
(SELECT id FROM posts WHERE topic_id = YOUR_TOPIC_ID AND post_number = 1) AS post_id
FROM users u
INNER JOIN group_users gu ON gu.user_id = u.id
INNER JOIN groups g ON g.id = gu.group_id
WHERE g.name = 'beta-testers'
Reemplaza YOUR_TOPIC_ID
Y creo que debe tener marcada la opción «Query targets posts».