토픽 병합 후 `NoMethodError in TopicsController#show` 오류 발생

tannerabread · 7월 2, 2026, 6:31오후

FIX: Topic Merging with Events (#41369)

main ← fix-event-topic-merging

merged 06:30PM - 02 Jul 26 UTC

meta topic: [`/t/371843`](https://meta.discourse.org/t/nomethoderror-in-topicsco…ntroller-show-error-after-merging-topics/371843) This fixes the bug pointed out about merging topics with events. The issue was that when merging topics with events, it circumvented the event validation logic and allowed event posts to be merged into topics that already have events or displace the event post in the destination. Add a topic extension to handle the event validation logic when merging topics with events. Also add null safety in the event serializer to handle cases where the event post is no longer valid.

이 문제는 수정되었으며, 다른 유사한 시나리오에 대한 추가적인 가드도 추가되었습니다

글		댓글	조회수
Topic unlisted to all users including admins after merging topics Support	3	158	6월 28, 2025
User merge failed, corrupted database entries due to third party plugin Support merge-user	31	3084	10월 6, 2020
Topic in a category make unreachable the category and user activity and the topic itself Support	1	913	7월 12, 2019
"Move to existing topic" admin feature not working [now fixed] Bug	14	969	5월 29, 2019
Can't delete this category because it has 1 topic Support	11	1306	2월 2, 2021

토픽 병합 후 `NoMethodError in TopicsController#show` 오류 발생

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