How to update variable content on other variable change

Grafana Plugin Development
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1

Hello,

I’m writing a Datasource plugin with grafana “^9.3.8”.

I don’t find a callback ‘on variable change’ to update the content of other variables in the datasource.ts.

More context:
That plugin contains a QueryVariableEditor that allow to create several kinds of variables :
image

For the simulations, it allows to select a Simulator variable to link it => We retrieve the simulations of a specific simulator by request.
image

It works perfectly while I create the variables. Now I would like to update the option list dynamically when the user is in the dashboard.

image
image754×177 17.2 KB

For example, I select the simulator 3390… and the content of the simulationVariable adapt itself to have only the simulations of that simulator 3390…

I don’t find the callback ‘on variable change’ to update the content of other variables in the datasource.ts.

I noticed when the variable is used in the QueryEditor, the function metricFindQuery is called. I can then update the content list by using:

getTemplateSrv().getVariables().forEach((variable) => {
      if (variable.type == 'query') {
        variable.options = // New list of options
      }
    }

But it seems wrong. And that solution is not completely satisfying as i have to used the variable in the query editor.

Thank you in advance for your help
Loïc.

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