How can I work with SQL NULL values and JSON in a good way?

Question

Go types like Int64 and String cannot store null values, so I found I could use sql.NullInt64 and sql.NullString for this.

But when I use t

Answer 1

If you use the null.v3 package, you won't need to implement any of the marshal or unmarshal methods. It's a superset of the sql.Null structs and is probably what you want.

package main

import "gopkg.in/guregu/null.v3"

type Person struct {
    Name     string      `json:"id"`
    Age      int         `json:"age"`
    NickName null.String `json:"nickname"` // Optional
}

If you'd like to see a full Golang webserver that uses sqlite, nulls, and json you can consult this gist.