[Bug]: 'PDF conversion' flow does not properly update PDF #51978
Description
⚠️ This issue respects the following points: ⚠️
- This is a bug, not a question or a configuration/webserver/proxy issue.
- This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
- Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
- I agree to follow Nextcloud's Code of Conduct.
Bug description
All latest as of this day versions
Nextcloud 31.0.2
'NextCloud office' app 8.6.4
'Collaborative tags' app 1.21.1
'Workflow external scripts' app 2.0.0
'Automated PDF conversion' app 2.0.0 (LibreOffice installed on the server)
'PDF viewer' app 4.0.0
Manual changes to files in #51927
Collabora Online server (NOT built-in CODE)
NextCloud Encryption enabled
Problem: PDF not correctly updated in 'overwrite existing PDF' mode with 'PDF conversion' flow.
- Created flow for PDF creation/update upon 'file created' and 'file updated' events with the following settings
Note - event type does not matter here, the error is reproduced with other trigger events (except for 'tag assigned', which does not work anyway - see #51849 )
-
Created ODT file with content 'Lorem ipsum'
-
Cron job executed. PDF is generated by the flow, with 'Lorem ipsum' content.
- Modified ODT (added 'Mod'), saved changes
- Cron job executed. PDF file was somehow changed, but there are NO visible changes to the content, the original 'Lorem ipsum' is still there
If PDF is downloaded, it also 'Lorem ipsum' version.
- Then, on PDF file, going to Open Details > Versions > clicking on 'Initial version' or 'Current version' or 'Compare to current version' nothing happens - black screen, infinite loader
- Then, on PDF file, going to Open Details > Versions > 'Current version' - Download. Downloaded version is 'MOD Lorem ipsum'
So somehow PDF is updated inside, but not written properly (cache, DB, etc, no idea), so end-user still sees old PDFs, when PDF is accessed from regular UIs.