Flow App External Script Not Triggered for Folder Tags

ℹ️ Support
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  • Nextcloud Server version (eg, 29.xx): 30.0.4.1
  • Operating system and version (eg, Ubuntu 24.04): Ubuntu 24.04
  • Web server and version (eg, Apache 2.4.25): Apache/2.4.62 (Debian)
  • Reverse proxy and version (eg nginx 1.27.2): nginx 1.27.2
  • PHP version (eg, 8.3): 8.2.27
  • Is this the first time you’ve seen this error? (Yes/No): Yes
  • When did this problem seem to first start? When testing workflow automation with folder tagging.
  • Installation method (eg AlO, NCP, Bare Metal/Archive, etc.): Docker
  • Are you using Cloudflare, mod_security, or similar? (Yes / No): No , Caddy

Summary of the Issue

The Flow app (workflow engine) does not trigger the external script function when a folder is tagged, even though the tagging event is logged. However, when a file is tagged, the external script is triggered without any issues.

Steps to Replicate

  1. Create or upload a file or folder to Nextcloud.
  2. Apply a system tag to the file or folder.
  3. Monitor the logs for the workflowengine app to observe behavior differences between file and folder tags.

Observations

  1. For files:

    • The Flow app logs the event (OCP\SystemTag\ISystemTagObjectMapper::assignTags) and successfully triggers the external script.
    • Example log entry:
    Flow rule qualified to run Run script, config: {"operation":"python3 /scripts/flow_tag_notify.py ..."}

  2. For folders:

    • The Flow app logs the tagging event but does not trigger the external script.
    • Example log entry:
    Flow activated by event OCP\SystemTag\ISystemTagObjectMapper::assignTags

  3. The workflow engine seems to treat folders differently from files, and no rules are applied for folders, even though the tag assignment is recorded.

Nextcloud Log Entries

File Tag Log:

{"reqId":"hLz5DQotPEdRcJukkTRz","level":0,"time":"2025-01-10T05:25:14+00:00","remoteAddr":"10.0.0.84","user":"NCAdmin","app":"workflowengine","method":"PUT","url":"/remote.php/dav/systemtags-relations/files/1635489/24","message":"Flow rule qualified to run Run script, config: {"operation":"python3 /scripts/flow_tag_notify.py ..."}"}

Folder Tag Log:

{"reqId":"gKvQTkqVlVUXzzeyEtO7","level":0,"time":"2025-01-10T05:21:39+00:00","remoteAddr":"10.0.0.84","user":"NCAdmin","app":"workflowengine","method":"PUT","url":"/remote.php/dav/systemtags-relations/files/1632491/24","message":"Flow activated by event OCP\SystemTag\ISystemTagObjectMapper::assignTags"}

Configuration

Nextcloud config.php:

Click to expand 
{
    "htaccess.RewriteBase": "/",
    "memcache.local": "\\OC\\Memcache\\APCu",
    "apps_paths": [
        {
            "path": "/var/www/html/apps",
            "url": "/apps",
            "writable": false
        },
        {
            "path": "/var/www/html/custom_apps",
            "url": "/custom_apps",
            "writable": true
        }
    ],
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "password": "***REMOVED SENSITIVE VALUE***",
        "port": 6379
    },
    "dbtype": "mysql",
    "version": "30.0.4.1",
    "installed": true,
    "loglevel": 0
}

Questions

  1. Does the Flow app support folder tagging events for workflows?
  2. Is this behavior expected or a known issue?
  3. Are there any workarounds or configurations to make the Flow app trigger external scripts for folder tags, as it does for file tags?
  4. Could this require custom modifications or additional logging to detect folder-related triggers?

Additional Context

  • Below are the relevant app versions:
    • workflowengine: 2.12.0
    • workflow_script: 1.15.0

What I’m Looking For

I would greatly appreciate any guidance, workarounds, or fixes for this issue. If this is a limitation of the Flow app or Nextcloud, suggestions for custom development or reporting this issue to the developers would also be helpful.

Thanks for your support!

Best regards,
Daniel