Custom JSON Unmarshaller

customjson.go

package main

import (
        "encoding/json"
        "fmt"
)

type myStruct struct {
        Field1 string
        Field2 string
}

func (m myStruct) MarshalJSON() ([]byte, error) {
        return json.Marshal(struct {
                Field1      string
                Field2      string
                Field3const string
        }{
                Field1:      m.Field1,
                Field2:      m.Field2,
                Field3const: "Bob"})
}

func main() {
        m := myStruct{Field1: "Hello", Field2: "Hey"}
        ba, err := m.MarshalJSON()
	if err != nil {
	fmt.Println(err)
	}
        fmt.Println(string(ba))
}