JSON

README.md

http://play.golang.org/p/QG8I4gSEfc

post.go

package main

import (
	"encoding/json"
	"fmt"
)

type Post struct {
	Id     int    `json:"id"`
	UserId int    `json:"-"`
	Title  string `json:"title"`
}

type User struct {
	Id   int     `json:"id"`
	Name string  `json:"name"`
}

type J struct {
	*Post
	User *User  `json:"user"`
}

func main() {
	p := &Post{100, 1, "foobar2000"}
	u := &User{1, "tomoya"}
	j := &J{p, u}
	b, err := json.Marshal(j)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(b))
	//fmt.Println("Hello, playground", p, u, j)
}