Wrong variable expansion format

[zarbis]

If when trying to use variables in queries, they are expanded in format that Flux doesn't expect, even if those variables were defined with Flux query themselves.

For example, if I use it to filter:

filter(fn: (r) =>
r.source =~ $source AND
...)

Variable will be expanded into {foo,bar,baz} while Flux expects Go-style regex like /^(foo|bar|baz)$/.

Also single choice variable will be expanded without double quotes, which also breaks Flux query. One cannot just blindly wrap variable in quotes themselves "$source" since if this variable has multiple/all checkboxes - it will break Go-style regex. Not sure how to deal with this one.

Grafana: 5.4.0 Flux Datasource: 5.2.6

[nikolay-t]

I don't think the suggested change is necessary, because you can control how Grafana embeds variable using :pipe suffix, like this:

r.host =~ /^${host:pipe}$/

[zarbis]

@nikolay-t yeah, sure you can, but does "only working version" not qualify for sensible default?

[davkal]

Agreed on using pipe as default.