Go: Marshal empty struct into json

Question

I'm trying to marshal a struct into json. It works when the struct has values. However, I'm unable to access the webpage when the struct has no value:

Go:

type Fruits struct { Apple []*Description 'json:"apple, omitempty"' } type Description struct { Color string Weight int } func Handler(w http.ResponseWriter, r *http.Request) { j := {[]} js, _ := json.Marshal(j) w.Write(js) }

Is the error because json.Marshal cannot marshal an empty struct?

What error? You're explicitly ignoring the error. It might help to check it. Also, {[]} is invalid syntax in Go. — Logiraptor
– Logiraptor, Commented Oct 5, 2014 at 1:37

Logiraptor · Accepted Answer · 2014-10-05 01:42:18Z

See here: http://play.golang.org/p/k6d6y7TnIQ

package main import "fmt" import "encoding/json" type Fruits struct { Apple []*Description `json:"apple, omitempty"` } type Description struct { Color string Weight int } func main() { j := Fruits{[]*Description{}} // This is the syntax for creating an empty Fruits // OR: var j Fruits js, err := json.Marshal(j) if err != nil { fmt.Println(err) return } fmt.Println(string(js)) }

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