Thumbnail not regenerated as file changes

[phil-davis]

Steps part 1

1. Login as "someuser"
2. Create a file "test.txt" and edit several times to create versions
3. Open the "Versions" tab in the sidebar
4. Restore some previous version
5. Close the "Versions" panel, even refresh the whole files page
6. Look at the thumbnail preview

Expected results

Thumbnail shows content from the restored version.

Actual result

Thumbnail shows unchanged content.

Version

10.0.9RC1

Steps part 2

There is no thumbnail update when doing upload-overwrite:

1. Upload some x.png file - observe the thumbnail looks like a small version of the file content
2. Locally edit/replace the x.png file with some other graphics content
3. Upload x.png and choose to keep the new file
4. Download x.png - check that is does have the new content

Expected results

Thumbnail displays updated content

Actual result

Thumbnail shows unchanged content.

Steps part 3

There is no thumbnail update when editing an existing text file:

1. Create a new text file with some content - observe that the thumbnail shows the early content
2. Edit the text file in the webUI, changing some content early on line 1 (to make sure it should be part of the thumbnail)

Expected results

Thumbnail displays updated content

Actual result

Thumbnail shows unchanged content.

[phil-davis]

Issue #31797 fixed up thumbnails being displayed for each version in PR #31801 - perhaps there is something more to do in an area close to that to get thumbnail regeneration going again?

Issue #10559 had this problem some years ago, and was closed/fixed.

[phil-davis]

Works in 10.0.8

[phil-davis]

@davitol please try to reproduce this, to make sure I am not imagining.

[ownclouders]

GitMate.io thinks the contributor most likely able to help you is @PVince81.

Possibly related issues are #19219 (Thumbnail is not updated, when restoring a file), #10559 (Thumbnails not regenerated when reverting to an earlier version of a file), #28115 (Thumbnails are not shown in the version section), #205 (Files: thumbnails), and #31659 (don't delete the source files when generating thumbnails).

[davitol]

It seems it works for me. Are you using regular storage or an external one?

[phil-davis]

In your screen capture, the thumbnail of the file keeps showing "asdfa" - but it should change as you restore different versions.

[davitol]

In your screen capture, the thumbnail of the file keeps showing "asdfa" - but it should change as you restore different versions.

Yes I misunderstood the title. It happens for me justonly editing the file, no need of restoring a version

[phil-davis]

As discussed in chat, thumbnail update is working while editing a new file. But if I edit an existing file, then the content changes OK, but the thumbnail is not updated.

[PVince81]

@DeepDiver1975 are you able to have a look ? are we missing some hook triggers to tell the preview system to reset the preview after restore ?

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.