Templating constant type variable being escaped

Grafana
1

Hi there,
I’m using Elasticsearch as the datasource and created a template to make the Dashboard update when some fields are changed.
So I created a template with 3 variables and one of them is of type constant.
The constant type variable is to be filled by user with numbers that can have dashes “-” in it. This is a Zip Code for Brazil so I can have only the first 5 digits or the full Zip Code like “12345-678”.
When I put the first 5 digits it works as expected and the Dashboard is updated with the correct values.
When I put the full Zip Code with “-” in contante type variable it seems like the query sent to Elasticsearch is not correct.
I used the browser to investigate what is going on and noticed that variable is escaped like that “12345\-678”.
Is there any workaround ?
Is there any other way to let customer input the Zip Code ?
I also tested the query in the Panel | Metrics | Query and the “-” works. The problem is only related to the template variable.
Thank you in advance. Regards, Ricardo

2

Hi,

That sounds a bit weird and I don’t know of any workaround for this problem right now. Seems like a bug. I suggest you to send a bug report at Grafanas GitHub repo.

Thanks

Marcus

3

In case anyone else comes across this post, you can now control how variables are escaped in queries:

  • ${varname}
  • ${varname:csv} csv formatting for multi valued variables
  • ${varname:raw} no escaping (very useful)
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