Diff between revisions no longer visible when there is a hidden revision in between

zogstrip · July 2, 2026, 6:37pm

Yeah, that’s kinda tricky Maybe this will be “enough” for now?

github.com/discourse/discourse

UX: Explain why a revision diff can't be shown in the edit history (#41367)

main ← hidden-revision-diff-notice

merged 05:41PM - 02 Jul 26 UTC

ZogStriP

+92 -9

Previously, when a post revision was hidden, the history modal showed a complete…ly blank diff area for the revisions next to it, with no explanation — the diffs on either side of a hidden revision aren't rendered because they can expose the hidden revision's content, but users were left thinking the edit history was broken. Reported in https://meta.discourse.org/t/diff-between-revisions-no-longer-visible-when-there-is-a-hidden-revision-in-between/406254. This change shows an explanatory notice in place of the blank diff, driven by the `previous_hidden`/`current_hidden` flags the serializer already exposes for exactly these revisions. The `hiddenClasses` dimming is skipped when the notice shows, since it exists to fade hidden content staff can still see and would fade the notice in the inline view. It also rewords the related `diff_too_complex` messages in the same plain language, since "diff" and "revision" aren't words most users know.

Topic		Replies	Views
Users can hide specific revisions in edit history? Bug	8	1294	September 14, 2019
Endless loading of post history when latest revision is hidden/inaccessible Bug fixed , revisions	9	623	August 27, 2024
Happening again: Revision is hidden/inaccessible Bug	0	72	April 5, 2025
Revision history for flagged post isn't comparing the correct revisions Bug	8	768	January 27, 2020
Ability to hide or delete old revisions on selected posts Feature completed	3	3848	October 14, 2014

Diff between revisions no longer visible when there is a hidden revision in between

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