[Bug]: After update 33.0.2 → 33.0.3, occ upgrade does not populate new MIME types — files download instead of opening in viewer

[nkjf-de]

Steps to reproduce

1. Update Nextcloud from 33.0.2 to 33.0.3 via occ upgrade
2. Open any Office file (.docx, .xlsx, .pptx, .odt, etc.) in the Files app

Expected behavior

File opens in Nextcloud Office (richdocuments/Collabora)

Actual behavior

Browser immediately triggers a download dialog. Files are downloaded instead of opened.

Fix

Manually running the following commands resolves the issue:
php occ maintenance:mimetype:update-db
php occ maintenance:mimetype:update-js

Output: "Added 88 new mimetypes" — all missing after the 33.0.2 → 33.0.3 update.

Environment

Nextcloud: 33.0.2 → 33.0.3
richdocuments (Collabora): 10.1.3
viewer: 6.0.0
PHP OPcache: enabled (Apache)
DB: MySQL
Root cause
occ upgrade does not call maintenance:mimetype:update-db during the
33.0.2 → 33.0.3 patch migration. New MIME types added to mimetypemapping.json
in 33.0.3 are never written to the oc_mimetypes table, so Nextcloud cannot
route file opens to the correct viewer app — it falls back to a browser download.

[joshtrichards]

I believe there's a setup check for this that likely would have been triggered:

Yeah:

server/apps/settings/lib/SetupChecks/MimeTypeMigrationAvailable.php

Line 38 in 0ff0136

$this->l10n->t('One or more mimetype migrations are available. Occasionally new mimetypes are added to better handle certain file types. Migrating the mimetypes take a long time on larger instances so this is not done automatically during upgrades. Use the command `occ maintenance:repair --include-expensive` to perform the migrations.'),

But maybe it could be more visible (i.e. during the update run too) if there are side effects like this.