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nulltime.go
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nulltime.go
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package nullable
import (
"bytes"
"database/sql/driver"
"time"
"encoding/json"
)
// NullTime MarshalJSON ignores ZeroTime
type NullTime struct {
Time time.Time
Valid bool
}
func (nt *NullTime) Scan(value interface{}) error {
if _, ok := value.(time.Time); ok && !value.(time.Time).IsZero() {
nt.Time, nt.Valid = value.(time.Time), true
return nil
}
t := new(time.Time) // zero time
nt.Time, nt.Valid = *t, false
return nil
}
func (nt NullTime) Value() (driver.Value, error) {
if !nt.Valid {
return nil, nil
}
return nt.Time, nil
}
func (ns NullTime) MarshalJSON() ([]byte, error) {
if ns.Valid && !ns.Time.IsZero() {
//return json.Marshal(ns.Time.UnixNano() / 1e6)
return json.Marshal(ns.Time.Format("2006-01-02T15:04:05.000Z"))
//time.RFC3339
}
return []byte("null"), nil
}
func (ns *NullTime) UnmarshalJSON(b []byte) error {
if bytes.Equal(b, []byte("null")) || string(b) == "" || string(b) == `""` {
ns.Time = time.Time{}
ns.Valid = false
return nil
}
var s time.Time
if err := json.Unmarshal(b, &s); err != nil {
return err
}
ns.Time = s
ns.Valid = true
return nil
}