How to use Switch or if/elseif/else inside Golang HTML templates?

Question

I have this struct : const ( paragraph_hypothesis = 1<<iota paragraph_attachment = 1<<iota paragraph_menu = 1<<iota ) type Paragraph struct { Type int // paragraph_hypothesis or paragraph_attachment or paragraph_menu } I want to display my paragraphs in a Type dependent way. The only solution I found was based on dedicated functions like isAttachment testing the Type in Go and nested {{if}} : {{range .Paragraphs}} {{if .IsAttachment}} -- attachement presentation code -- {{else}}{{if .IsMenu}} -- menu -- {{else}} -- default code -- {{end}}{{end}} {{end}} In fact I have more types, which makes it even weirder, cluttering both the Go code with IsSomething functions and the template with those {{end}}. What's the clean solution ? Is there some switch or if/elseif/else solution in go templates ? Or a completely different way to handle these cases ?

Chris Gregori · Accepted Answer

Templates are logic-less. They're not supposed to have this kind of logic. The maximum logic you can have is a bunch of if. In such a case, you're supposed to do it like this: {{if .IsAttachment}} -- attachment presentation code -- {{end}} {{if .IsMenu}} -- menu -- {{end}} {{if .IsDefault}} -- default code -- {{end}}

Go Language

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