Events from subscribed calendar not showing up in Upcoming widget.

[C8620]

Steps to reproduce

1. Install the latest calendar app (4.6.0 at time of writing)
2. Subscribe to a public calendar (e.g. an group event list)
3. Open dashboard.
   (This is not reproduceable using app version <4.5.0)

Expected behavior

Events from subscribed calendar is showing up in the list.

Actual behaviour

Only events from non-subscribed calendars are appearing.

Calendar app version

4.6.0 (any version >= 4.5.0)

CalDAV-clients used

Not relevant.

Browser

Microsoft Edge 120, Firefox 120

Client operating system

Windows, Ubuntu, Android

Server operating system

Cloudlinux

Web server

Other

Database engine version

MariaDB

PHP engine version

PHP 8.2

Nextcloud version

27.1.4

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

Enabled:
  - activity: 2.19.0
  - admin_audit: 1.17.0
  - appointments: 1.15.4
  - bruteforcesettings: 2.7.0
  - calendar: 4.6.0
  - camerarawpreviews: 0.8.4
  - cfg_share_links: 4.2.0
  - checksum: 1.2.2
  - cloud_federation_api: 1.10.0
  - comments: 1.17.0
  - contacts: 5.5.0
  - dashboard: 7.7.0
  - dav: 1.27.0
  - deck: 1.11.2
  - emlviewer: 1.0.8
  - epubviewer: 1.5.3
  - external: 5.2.1
  - externalportal: 1.2.0
  - federatedfilesharing: 1.17.0
  - federation: 1.17.0
  - files: 1.22.0
  - files_3dmodelviewer: 0.0.12
  - files_downloadactivity: 1.16.0
  - files_external: 1.19.0
  - files_markdown: 2.4.1
  - files_pdfviewer: 2.8.0
  - files_reminders: 1.0.0
  - files_rightclick: 1.6.0
  - files_sharing: 1.19.0
  - files_trashbin: 1.17.0
  - files_versions: 1.20.0
  - files_zip: 1.4.0
  - forms: 3.4.3
  - imageconverter: 1.3.5
  - integration_github: 2.0.6
  - integration_youtube: 0.1.5
  - libresign: 7.1.1
  - login_notes: 1.3.1
  - logreader: 2.12.0
  - lookup_server_connector: 1.15.0
  - mail: 3.5.0
  - metadata: 0.19.0
  - music: 1.9.1
  - news: 24.0.0
  - notes: 4.9.0
  - notifications: 2.15.0
  - oauth2: 1.15.1
  - occweb: 0.1.1
  - privacy: 1.11.0
  - provisioning_api: 1.17.0
  - quicknotes: 0.8.10
  - quota_warning: 1.18.0
  - richdocuments: 8.2.3
  - secrets: 1.5.2
  - serverinfo: 1.17.0
  - settings: 1.9.0
  - sharebymail: 1.17.0
  - sharepoint: 1.15.0
  - side_menu: 3.11.2
  - socialsharing_email: 3.0.1
  - spreed: 17.1.3
  - text: 3.8.0
  - theming: 2.2.0
  - theming_customcss: 1.15.0
  - transfer: 0.6.1
  - twofactor_backupcodes: 1.16.0
  - twofactor_nextcloud_notification: 3.8.0
  - twofactor_totp: 9.0.0
  - twofactor_webauthn: 1.3.2
  - updatenotification: 1.17.0
  - video_converter: 1.0.6
  - viewer: 2.1.0
  - weather_status: 1.7.0
  - workflowengine: 2.9.0
Disabled:
  - circles: 27.0.1 (installed 26.0.0)
  - contactsinteraction: 1.8.0 (installed 1.7.0)
  - encryption: 2.15.0
  - firstrunwizard: 2.16.0 (installed 2.16.0)
  - nextcloud_announcements: 1.16.0 (installed 1.15.0)
  - password_policy: 1.17.0 (installed 1.16.0)
  - photos: 2.3.0 (installed 2.2.0)
  - recommendations: 1.6.0 (installed 1.5.0)
  - related_resources: 1.2.0 (installed 1.1.0-alpha1)
  - support: 1.10.0 (installed 1.9.0)
  - survey_client: 1.15.0 (installed 1.14.0)
  - suspicious_login: 5.0.0 (installed 4.4.0)
  - systemtags: 1.17.0 (installed 1.16.0)
  - user_ldap: 1.17.0
  - user_status: 1.7.0 (installed 1.7.0)

Nextcloud configuration

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***",
            "***REMOVED SENSITIVE VALUE***",
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "27.1.4.1",
        "overwrite.cli.url": "https:\/\/***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_language": "en",
        "default_locale": "en_gb",
        "app_install_overwrite": [
            "theming_customcss",
            "checksum",
            "emlviewer",
            "metadata",
            "socialsharing_email",
            "transfer",
            "weather",
            "files_3d",
            "podcast",
            "libresign",
            "files_downloadactivity"
        ],
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "theme": "",
        "simpleSignUpLink.shown": false,
        "mail_smtpsecure": "ssl",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtpport": " 465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "music.enable_radio_hls": true,
        "music.podcast_auto_update_interval": 1,
        "remember_login_cookie_lifetime": 1296000,
        "htaccess.RewriteBase": "\/",
        "session_lifetime": 86400,
        "session_keepalive": true,
        "filelocking.enabled": false,
        "appcodechecker": false,
        "enable_previews": false,
        "auto_logout": false,
        "maintenance": false,
        "loglevel": 0,
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [
            "admin"
        ],
        "twofactor_enforced_excluded_groups": [
            "guest_app"
        ],
        "connectivity_check_domains": [
            "www.google.cn",
            "one.one.one.one"
        ]
    }
}

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

Server: LiteSpeed Enterprise.

[miaulalala]

Do you see the changes in the webUI? We've had some reports that the subscription calendars don't work at the moment.

[C8620]

Do you see the changes in the webUI? We've had some reports that the subscription calendars don't work at the moment.

I am not observing significant offset or change in WebUI, or console / internal errors related to calendar, potentially due to not upgrading to NC28?

A lot of apps are not compatible with NC28 so I think I will not be upgrading anytime soon.

After reverting calendar app multiple times, it appears to be a regression / bug introduced from app version 4.5.0, and left unfixed (probably unreported as well) until now.

[C8620]

Following @escoand 's mention of this issue, I wish to make a clarification:

This issue is about subscribed events not showing up along with local events in the Upcoming Events widget in dashboard. And considering downgrading will resolve this issue, this is an issue with the calendar app.

Hope it helps.

[C8620]

Update:
NC28 does not resolve this issue.

[C8620]

There seems to be two parts that consists of the bug (but I could be wrong)

In 4.5.0 version of the cal app, commit babc444 introduced codes to lib/Dashboard/CalendarWidget.php that would gracefully handle the recurring events. However, for subscribed events, it seems that subscribed events will trigger the $recurrence === null exception at line 169 and simply gets skipped.

Considering the search options have already confined the events returned to be within this range, it would be almost impossible (unless there are bugs elsewhere) if an recurring event has no occurrence within this period, so I assume one way to mitigate this issue is by changing the continue at line 170 to $recurrence = $calendarEvent['objects'][0].

This works when forcing the application to use the original widget, but seems to be not working on widget V2 for some reason, which is the part I do not get to understand yet.

[nekton181]

Following @escoand 's mention of this issue, I wish to make a clarification:

This issue is about subscribed events not showing up along with local events in the Upcoming Events widget in dashboard. And considering downgrading will resolve this issue, this is an issue with the calendar app.

Hope it helps.

This is what I am experiencing as well. How does one revert to an earlier version of Calendar where the problem seems to be located in?

[scharmach]

How does one revert to an earlier version of Calendar where the problem seems to be located in?

@nekton181 #5563 (comment)

[snagglewest]

If you're still on NC27 this will work.
#5563

If you've upgraded to NC28 its not so simple. NC28 completely breaks it and modifies your database. The only solution then is to completely revert to NC27 restore your database to a NC27 version and then downgrade to calendar-v4.4.5