[SOLVED] Setting a variable to one of two values in a shortcode

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1

I’m creating a shortcode at the moment, and I have this variable, which gets the value of the first parameter:

{{ $imageName := .Get 0 }}

Ideally though, I want to get the value of a parameter named “name”, and if that parameter/value doesn’t exist, then the fallback would be to use the first parameter.

I know this isn’t actual code, but something like this:

{{ $imageName := .Get "name" or .Get 0 }}

I’ve tried to figure this out myself, but Go’s templating language hasn’t quite “clicked” for me yet, and I haven’t been able to find any clear resources for learning it as of yet.

Any help would be appreciated.

:slight_smile:

2

Edit: IGNORE THIS :smile:

{{if .IsNamedParams }}
{{$imageName := .Get "name"}}
{{else}}
{{$imageName := .Get 0}}
{{end}}

https://gohugo.io/extras/shortcodes#single-flexible-example-vimeo-with-defaults

3

Does this actually work? I tried a similar problem before, but I kept getting errors of the variable ($imageName here) being undefined. It looked like the execution kept variable constrained to the if/else scope, and it wasn’t available outside of it.

4

There is definitely scoping issues, unfortunately. But I’m guessing that’s where Hugo’s “Scratch” functionality might come in handy? I’m going to try it later.

5

No, it doesn’t work. You will need to set those in Scratch as a workaround.

6

Sorry, it won’t work w/r/t redefining the variable, but you can use the .Get directly, at least that’s the way it’s currently being represented in the docs…

So…


{{if .IsNamedParams}}
<img src="images/{{.Get "name"}}"/>
{{else}}
<img src="images/{{.Get 0}}"/>
{{end}}
7

This seems to be working for me now:

{{ if .IsNamedParams }}
    {{ $imageName := .Get "name" }}
    {{ $.Scratch.Add "imageName" $imageName }}
{{ else }}
    {{ $imageName := .Get 0 }}
    {{ $.Scratch.Add "imageName" $imageName }}
{{ end }}

{{ $imageName := $.Scratch.Get "imageName" }}

With this code in place, I can simply reference the $imageName variable, without the scoping issues.

I’ve also found a use for the default function, mentioned on this page.

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