Only posts with no likes or reactions can be "liked" in an archived topic

zogstrip · April 1, 2026, 12:42pm

Thanks @NateDhaliwal & @Moin, looks like reactions had some wrong logic when it came to handling archived topics.

github.com/discourse/discourse

FIX: Prevent reactions on posts in archived topics (#39038)

main ← fix/reactions-archived-topic-like-button

merged 02:38PM - 01 Apr 26 UTC

ZogStriP

+92 -14

When a post in an archived topic has no existing likes, the backend omits the li…ke entry from `actions_summary` (no count, no `can_act`, no `acted`), making `likeAction` null on the frontend. Core's like button handles this correctly (renders as disabled), but the reactions plugin — which replaces core's like button — had guards that checked `likeAction && !(canToggle || can_undo)`. When `likeAction` was null, the guard was bypassed, allowing clicks that triggered a 403 from the backend with a misleading "too long ago" error message. Posts with existing likes were unaffected since `likeAction` existed with `canToggle: false`, and the guard worked as intended. This commit: - Flips the `toggleFromButton` guard from `likeAction && ...` to `!likeAction || ...` so null likeAction blocks the interaction - Reorders the `toggle()` condition to check `likeAction?.canToggle` first, preventing reactions via the emoji picker - Adds an early return in `pointerOver` when `!likeAction?.canToggle` to prevent the reaction picker from opening on hover - Adds optional chaining in the picker's `reactionInfo` getter to fix a TypeError crash on `post.likeAction.canToggle` when null - Uses the server error message in `_extractErrors` when available instead of a hardcoded misleading string, and updates the fallback translation to a generic message https://meta.discourse.org/t/399681

Topic		Replies	Views
Like button does not work on archived topics Bug reactions	24	1356	August 23, 2022
Your own liked posts have a like button Bug	10	810	August 27, 2022
When a topic is archived and like button pressed it shows notification UX	0	397	May 25, 2022
Missing icon for likes on archived topics UX	10	1529	July 14, 2019
Like button not appearing on archived topics Support	4	2566	February 15, 2019

Only posts with no likes or reactions can be "liked" in an archived topic

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