Custom Time Marshal/Unmarshal from unix milisecond

time.go

package types

import (
	"database/sql/driver"
	"fmt"
	"strconv"
	"strings"
	"time"
)

type Time time.Time

func (t Time) MarshalJSON() ([]byte, error) {
	return []byte(strconv.FormatInt(time.Time(t).UnixMilli(), 10)), nil
}

func (t *Time) UnmarshalJSON(s []byte) (err error) {
	r := strings.Replace(string(s), `"`, ``, -1)

	q, err := strconv.ParseInt(r, 10, 64)
	if err != nil {
		return err
	}

	*(*time.Time)(t) = time.Unix(0, q*int64(time.Millisecond))
	return
}

func (t Time) String() string { return time.Time(t).String() }

func (t *Time) Scan(value interface{}) error {
	switch v := value.(type) {
	case time.Time:
		*t = Time(v)
	case nil:
		*t = Time{}
	default:
		return fmt.Errorf("cannot sql.Scan() Time from: %#v", v)
	}
	return nil
}

func (t Time) Value() (driver.Value, error) {
	return driver.Value(time.Time(t)), nil
}