Converting Go struct to JSON

go, json

Solution

You need to export the `User.name` field so that the `json` package can see it. Rename the `name` field to `Name`.

package main

import (
    "fmt"
    "encoding/json"
)

type User struct {
    Name string
}

func main() {
    user := &User{Name: "Frank"}
    b, err := json.Marshal(user)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(b))
}

Output:

{"Name":"Frank"}

Problem

I am trying to convert a Go struct to JSON using the `json` package but all I get is `{}`. I am certain it is something totally obvious but I don't see it. ``` package main import ( "fmt" "encoding/json" ) type User struct { name string } func main() { user := &User{name:"Frank"} b, err := json.Marshal(user) if err != nil { fmt.Printf("Error: %s", err) return; } fmt.Println(string(b)) } ``` Then when I try to run it I get this: ``` $ 6g test.go && 6l -o test test.6 && ./test {} ```

Original source