Cannot use variables in additional JSON data about grafanajsondatasource HOT 15 CLOSED

I'll try it on my own tomorrow

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@cmoroexpedia can you try upgrading ur grafana?

I've only discovered that selecting All doesn't pass all values. I didn't notice that as I use it in a bit non-standard way so I have never manually selected variable before :) I have created an issue for that #31

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This has been fixed recently based on #26 (comment) with #28 Try to put quotes around.

Have to update documentation, thanks!

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Thanks for the quick response!

Enclosing my variable name in quotes worked, but I also had to change the variable configs to return all values between quotes:

Also, the All option doesn't work because that's not between quotes.

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@cmoroexpedia I meant something like this:

{ "additional": "optional json", "testvar": "$testvar" }

Try it and let me know

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Correct, that's what I did but I still got an error saying Unexpected token t in JSON. I found strange that it was complaining about token t that is the first char of the value of my variable, so I also enclosed the variable value in quotes and it worked. Basically double quoting.

I think I'll go a different route and get my variable content from scopedVars field instead. Thanks for your help!

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All value handling is implemented in #33

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@simPod I have the same problem in grafana v5.3.4, but it works well in grafana v6.0.2.

the additional json data is

{"nodename": "$node"}

and the erros in chrome is ：

metrics_panel_ctrl.ts:177 Panel data error: SyntaxError: Unexpected token h in JSON at position 15
    at JSON.parse (<anonymous>)
    at eval (datasource.ts:156)
    at Array.map (<anonymous>)
    at t.buildQueryTargets (datasource.ts:136)
    at t.query (datasource.ts:35)
    at t.issueQueries (metrics_panel_ctrl.ts:287)
    at t.issueQueries (module.ts:254)
    at angular.js:17051
    at angular.js:17095
    at c.$digest (angular.js:18232)

the $node should be "hz".

Correct, that's what I did but I still got an error saying Unexpected token t in JSON. I found strange that it was complaining about token t that is the first char of the value of my variable, so I also enclosed the variable value in quotes and it worked. Basically double quoting.

I think I'll go a different route and get my variable content from scopedVars field instead. Thanks for your help!

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I still have not updated the docs :/

You can try this: {"nodename": $node}

If that doesn't work, you can try to check what value comes to JSON.parse in datasource.ts.

But there have been some variable processing changes in Grafana till v5 so I'll maybe just bump the version requirement to v6.

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Documentation issue resolved via 0c2b628

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when I try : {"nodename": $node}, it doesn't work in grafana v6 and v5. And I don't know how to print the value comes to JSON.parse. I tried with {"nodename": $node}, and I just saw the value or $node in grafana v5 is "hz" (in quotes)。

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@skyever what version of this DS do you have?

To print the value you have to clone the repo and then add console.log, then build it, see https://github.com/simPod/grafana-json-datasource#development-setup

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@simPod the version is v0.1.3. And I will try this, thanks.

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I decide to update all of my grafana to v6.

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Ayright, I'll just bump it. Tagging 0.1.4.

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