Editing event may fail if event is a single instance resulting from various operations over a recurring series

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 7.0.0 DXP SP2
• Fix Version/s: 7.0.0 DXP FP26, 7.0.X EE, 7.0.4 CE GA5, Master
• Component/s: Calendar
• Labels:
  • QA-AUTOMATION
  • QA-F
  • backend_test
  • fw_test_integration
  • fw_test_unit
  • liferay-digital-enterprise-70-sp5
  • liferay-fixpack-de-26-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/1989

If a calendar has a time zone different from UTC, the event of a recurrent series ended by an "until" date can be impossible to update. Those are the conditions for this failure:

• Event's calendar is not in UTC.
• Event's start time falls in different days in UTC and the calendar's time zone.
• Event is a single instance of a recurring series.
• The event come to be a single instance by
  • being the first in the series; and
  • having all instances after it removed or edited.

Steps to reproduce

1. Start up Liferay.
2. Log in with admin account.
3. Change your user's time zone to "America/Los_Angeles."
   • In the Left panel, go into My Account > Account Settings.
   • Then go into Miscellaneus > Display Settings.
   • Choose "Standard Pacific Time." Save.
4. Add calendar to a page. Go to week view.
5. Create an event in the user calendar that:
   • Starts at Sunday, 8 PM.
   • Repeats every day.
6. Close the full edit window.
7. Drag the Tuesday instance to 9 PM.
8. Click on the Monday instance.
9. Change the title.
10. Click on "Save."
11. Choose "Following instances."

Expected results

• The Monday instance and following ones would change the title.

Actual results

• The Monday instance flashes out and come back unchanged.
• No instance is ever updated.

GIF reproduction