`NoMethodError in TopicsController#show` 错误，合并主题后

tannerabread · 2026年七月2日 18:31

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 Also add null safety in the event serializer to handle cases where the event post is no longer valid.

此问题已修复，并针对其他类似场景增加了额外的防护措施

話題		回覆	觀看
Topic unlisted to all users including admins after merging topics Support	3	167	2025年六月28日
User merge failed, corrupted database entries due to third party plugin Support merge-user	31	3183	2020年十月6日
Topic in a category make unreachable the category and user activity and the topic itself Support	1	930	2019年七月12日
"Move to existing topic" admin feature not working [now fixed] Bug	14	981	2019年五月29日
Can't delete this category because it has 1 topic Support	11	1334	2021年二月2日

`NoMethodError in TopicsController#show` 错误，合并主题后

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