Graphite: Fix splitting expressions in tag_value with template variables

[EduardZaydler]

What is this feature?

correct spilitting expressions in tag_value with template variables, grafana produce incorrect query for resolve variable with tag_values when depend on multi-value variable with several selected items

Why do we need this feature?
So the graphite queries work as expected

How to reproduce it:

Add 2 variables
route="test1,test2" (Custom type)
gateway="tag_values(route, route = ${route})" (Query on Graphite Datasource with refresh on Time Range Change)

On dashboard for variable route try to select test1 and test2

For resolve variable route incorrect query was formed

/api/datasources/proxy/2/tags/autoComplete/values?expr=route = {test1&expr=test2}&tag=route&limit=10000&from=1619180806&until=1619181708

Correct query parameter for expr=route is

expr=route={test,test2}

Who is this feature for?

Developers

Which issue(s) does this PR fix?:

Fixes #

Special notes for your reviewer:

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.

[CLAassistant]

All committers have signed the CLA.

[EduardZaydler]

hello, @drew08t , sorry for personal tag, but can you explain me what i`am doing wrong?

[NWRichmond]

Hi @EduardZaydler! Assuming you mean passing the Changelog Check, the PR title must be formatted as follows:

The pull request title should be formatted according to <Area>: <Summary> (Both "Area" and "Summary" should start with a capital letter).

So to fix, you could change the title to:

Graphite: Fix splitting expressions in tag_value with template variables

[EduardZaydler]

Hi @EduardZaydler! Assuming you mean passing the Changelog Check, the PR title must be formatted as follows:

The pull request title should be formatted according to <Area>: <Summary> (Both "Area" and "Summary" should start with a capital letter).

So to fix, you could change the title to:

Graphite: Fix splitting expressions in tag_value with template variables

thanks for the answer, fixed