can't load the activity history after the last Maria DB Core Update

[tioannidis]

Activity history are not loaded after OS Updates:

Steps to reproduce

1. OS Updates: console-setup console-setup-linux keyboard-configuration mariadb-client-10.1
   mariadb-client-core-10.1 mariadb-common mariadb-server mariadb-server-10.1
   mariadb-server-core-10.1 netplan.io nplan unattended-upgrades

2. Click the activty button

3. the waiting circle keeps spinning and nothing else appears.
   4.in the logs I find after every click on the activity button this error:

[PHP] Error: TypeError: Argument 1 passed to OCA\Activity\Controller\APIv2::getPreviewPathFromMimeType() must be of the type string, boolean given, called in /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php on line 387 at /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php#407

GET /nextcloud/ocs/v2.php/apps/activity/api/v2/activity/all?format=json&previews=true&since=0
from 77.7.62.156 by calabama at 2019-05-14T10:50:47+00:00

Expected behaviour

my activity history

Actual behaviour

Operating system:
Ubuntu 18.04.2 LTS

Web server:
Apache2

Database:
mysql Ver 15.1 Distrib 10.1.38-MariaDB

PHP version:
7.2.17

Nextcloud version: (see Nextcloud admin page)
15.0.7.0

Login as admin user into your Nextcloud and access
http://example.com/index.php/settings/integrity/failed
paste the results here.

No errors have been found.

List of activated apps:

• accessibility: 1.1.0
• activity: 2.8.2
• calendar: 1.6.5
• cloud_federation_api: 0.1.0
• comments: 1.5.0
• contacts: 3.1.1
• dav: 1.8.1
• federatedfilesharing: 1.5.0
• federation: 1.5.0
• files: 1.10.0
• files_pdfviewer: 1.4.0
• files_sharing: 1.7.0
• files_texteditor: 2.7.0
• files_trashbin: 1.5.0
• files_versions: 1.8.0
• files_videoplayer: 1.4.0
• firstrunwizard: 2.4.0
• gallery: 18.2.0
• logreader: 2.0.0
• lookup_server_connector: 1.3.0
• news: 13.1.6
• nextcloud_announcements: 1.4.0
• notifications: 2.3.0
• oauth2: 1.3.0
• password_policy: 1.5.0
• phonetrack: 0.5.1
• provisioning_api: 1.5.0
• serverinfo: 1.5.0
• sharebymail: 1.5.0
• support: 1.0.0
• survey_client: 1.3.0
• systemtags: 1.5.0
• theming: 1.6.0
• twofactor_backupcodes: 1.4.1
• updatenotification: 1.5.0
• workflow_pdf_converter: 1.0.1
• workflowengine: 1.5.0
  Disabled:
• admin_audit
• encryption
• files_external
• user_ldap

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder

Nextcloud configuration:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

  "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "zzz"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "15.0.7.0",
        "overwrite.cli.url": "https:\/\/zzz\/nextcloud",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "mail_smtpauthtype": "LOGIN",
        "maintenance": false,
        "loglevel": 2
    }

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser:
Firefox/66.0","version":"15.0.7.0"
Operating system:
Win10

Logs

Nextcloud log (data/nextcloud.log)

Insert your Nextcloud log here

{"reqId":"fV4d4PF33k4WSPPRRQt5","level":3,"time":"2019-05-14T10:57:08+00:00","remoteAddr":"77.7.62.156","user":"removed","app":"PHP","method":"GET","url":"/nextcloud/ocs/v2.php/apps/activity/api/v2/activity/by?format=json&previews=true&since=0","message":"TypeError: Argument 1 passed to OCA\Activity\Controller\APIv2::getPreviewPathFromMimeType() must be of the type string, boolean given, called in /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php on line 387 at /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php#407","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0","version":"15.0.7.0","id":"5cda9f046ad04"}

Browser log

[PHP] Error: TypeError: Argument 1 passed to OCA\Activity\Controller\APIv2::getPreviewPathFromMimeType() must be of the type string, boolean given, called in /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php on line 387 at /var/www/nextcloud/apps/activity/lib/Controller/APIv2.php#407

GET /nextcloud/ocs/v2.php/apps/activity/api/v2/activity/all?format=json&previews=true&since=0
from 77.7.62.156 by *removed* at 2019-05-14T10:50:47+00:00
Insert your browser log here, this could for example include:

[nickvergessen]

Can you modfiy this line:

activity/lib/Controller/APIv2.php

Line 387 in 09446c2

$preview['source'] = $this->getPreviewPathFromMimeType($fileInfo->getMimetype());

to say:

				$preview['source'] = $this->getPreviewPathFromMimeType($fileInfo->getMimetype() ?: 'application/octet-stream');

[tioannidis]

done, and now it works without errors and no error logs were created.
do you plan to put this change in the next app release?
This nextcloud instance was only a testsystem, I have another productiv machine and I better would wait with the os updates until the next activity release.
Regards,
Theo

[nickvergessen]

do you plan to put this change in the next app release?

yeah sure, but the next release is already in progress so it might be the one afterwards.

[tioannidis]

ok, thank you for the quick support.

[nickvergessen]

Will be part of 15.0.8 and 16.0.1