plone.app.event: Additional Dates Not Arranged Properly in Recurrence Selection

[rohnsha0]

BUG/PROBLEM REPORT (OR OTHER COMMON ISSUE)

What I Did:

1. Added recurring events using the repeat event feature.
2. Set the recurrence to end after a certain number of occurrences.
3. Manually added additional dates to the list.

Expected Behavior:

The selected dates should appear in a properly sorted order (chronologically).

Actual Behavior:

The manually added additional dates are not arranged in order with the automatically generated recurrence dates.

What version of Plone/ Addons I am using:

• Plone 6.1.1.dev0 (6108)
• CMF 3.6
• Zope 5.12
• Python 3.11.11
• PIL 11.0.0 (Pillow)
• WSGI: On
• Server: waitress 3.0.2

[stevepiercy]

I got slightly different, but still not correct sorting results on https://classic.demo.plone.org/en/++add++Event while editing the recurrence in the modal dialog.

After entering the recurrence, I added in order:

• 2025-02-10
• 2025-02-20
• 2025-02-24

They were inserted before the recurrence in the order of:

• 2025-02-24
• 2025-02-20
• 2025-02-10

That implies a zero-index insertion.

However, when I click Save, then the sort is correct in the event.

[rohnsha0]

It is added at zero'th index and just refreshes and comes to correct order after clicking or choosing any options or clicking save button

[rohnsha0]

Additionally, even if 12 Feb 2025 is added to the list, upon clicking Add date btn, it again adds the same date