Categories of an event can't be updated

[st3iny]

Steps to reproduce

1. Edit and event.
2. Open the sidebar editor.
3. Add some categories.
4. Save the event.

Expected behavior

It should save the event and all selected categories.

Actual behaviour

An error toast is shown, the event is not saved and the category picker is emptied.

https://github.com/nextcloud/calendar/assets/1479486/cb9cba57-fb4b-4eea-a5d6-22ba113860d2

Calendar app version

main

Browser log

Uncaught (in promise) TypeError: aValue.replace is not a function
    at Object.toICAL (ical.js:430:1)
    at ICAL.stringify.stringify.value (ical.js:1698:1)
    at ICAL.stringify.stringify.multiValue (ical.js:1675:1)
    at ICAL.stringify.stringify.property (ical.js:1612:1)
    at ICAL.stringify.stringify.component (ical.js:1498:1)
    at ICAL.stringify.stringify.component (ical.js:1507:1)
    at Component.toString (ical.js:2772:1)
    at CalendarComponent.toICS (index.es.mjs:9161:1)
    at Store.updateCalendarObject (calendarObjects.js:226:1)
    at Array.wrappedActionHandler (vuex.esm.js:851:1)

[Gehilfe]

Same Problem here.

[phantom943]

We also have this problem. By bisecting the release history, we found out that this bug was introduced in v4.7.0 (as the last version where it works is 4.6.7)

[comsyspro]

same here. can you downgrade somehow to calendar v4.6.7 and if yes how to do it?

[phantom943]

@comsyspro yes you can https://help.nextcloud.com/t/how-to-downgrade-calendar-app-from-3-0-3-to-3-0-2/129915/2 here are the instructions. However, the "invite circle to event" feature was added in 4.7.0, so downgrading wouldn't be feasible for us.

[comsyspro]

i downgraded to v4.7.0 but v4.6.7 was not possible because this version is not compatible. so the only solution is to fix the code.

[b90g]

Calendar 4.7.2 on NC 28.0.5 with php8.2.18 - having this issue.

[protegh]

Adding a category from the pull down list works with version 4.7.3 but adding a new own category is still broken.

[comsyspro]

i just updated to the new calendar version 4.7.3 and i can't even create a normal entry so it seems that something failed with the new code.

please have a look:

[st3iny]

@comsyspro It looks like your only calendar (Aufgaben) does not support VEVENTs because it was created through the Tasks app. Please create a new calendar and try again.

In general, please open a new issue next time and try not to revive old issues with unrelated bugs as you are generating a lot of notifications this way.

[comsyspro]

the error appeared after the upgrade with the events categories, so i suspected this was the problem. creating a new calendar did not resolve the issue and even deleting the new calendar failed. removing and reinstalling the calendar didn't help either. only a new installation of nextcloud was successful. there may be some fragments in the database that caused the problem.

[nmsw]

I have the exact same issue. The calendar was not created in the tasks app. A new regular calendar shows the same issue. Re-installing Nextcloud is not an option.

[miaulalala]

@nmsw Please open a new issue.