Empty value in Grafana variables

[Heyzi]

A simple query also returns an empty value, which should be filtered out.

grafana:11.4.0
victorialogs-datasource-v0.12.0

The logs are collected using vector with the following configuration:

  logs_system_to_loki:
    type: loki
    inputs:
      - journald_transform
    endpoint: "http://......./insert/loki/"
    path: /api/v1/push
    encoding:
      codec: json
    labels:
      job: 'journald'
      unit: "{{ unit }}"
      server_name: "{{ server_name }}"
    healthcheck:
      enabled: false

[krzysion]

You can use the regex expression /.+/

[Heyzi]

You can use the regex expression /.+/

Yes, it worked. I checked through Explore - the logs that don't have this label at all show empty values, so why should I display them in the filter? Maybe we should change the default behavior?

[yincongcyincong]

actually, it's a grafana issue. grafana add an empty string variable at this line https://github.com/yincongcyincong/scenes/blob/main/packages/scenes/src/variables/variants/MultiValueVariable.ts#L336
i will try give a pr to grafana. but i'm not sure when this is merged.

[dmitryk-dk]

Hi @Heyzi ! The issue was fixed in the release. Issue closed as solved. If you find any problem feel free to reopen the issue