Support for __text and __value in variables

[gelicia]

Describe the bug
In Grafana, users can set up query variables to build variable lists for filtering their dashboards. To support a key/value structure to these lists, there is the option of using __text and __value (ref) as aliases so one value will be displayed and one will be used as the filter.

This datasource automatically throws an error whenever more than one field is returned when building this list (src) which prevents this functionality from working.

To Reproduce
Steps to reproduce the behavior:

1. Be sure this datasource is installed in Grafana. I use a SQLite database for Grafana itself, so I set up the datasource to reference that database.
2. In a dashboard, click the gear to access settings, then go to Variables
3. Create a query variable with the name and label of users. "Show on dashboard" has "Label and value" selected.
4. Select your SQLite datasource, and under query, add SELECT id AS __value, login AS __text FROM user
5. Use defaults for everything else
6. Either apply the variable or click "Run query"
7. See the error about two fields

Versions (please complete the following information):

• OS: OSX
• Run via docker? No
• Browser: Chrome
• Grafana Version: main
• Plugin Version: 3.3.2
• Plugin installed via grafana-cli or manually? Installed via UI

[fr-ser]

Thank you very much for the detailed report. I'll take a look at this 👌🏻

[fr-ser]

The support for this should be added via this PR: #133.

You can manually install v3.5.0 of the plugin right now to check it.

After a while (a couple of weeks usually) the plugin is also updated on the regular Grafana release channels

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.