package main

import (
	"log"
	"time"

	"github.com/mongodb/mongo-go-driver/bson"
)

type testStruct struct {
	FieldA time.Time  `bson:"field_a"`
	FieldB *time.Time `bson:"field_b"`
}

func main() {
	now := time.Now()
	test := testStruct{
		FieldA: now,
		FieldB: &now,
	}
	data, err := bson.Marshal(test)
	if err != nil {
		log.Fatalf("Failed to marshal. Error: %v", err)
	}
	unTest := testStruct{}
	err = bson.Unmarshal(data, &unTest)
	if err != nil {
		log.Fatalf("Failed to marshal. Error: %v", err)
	}
	log.Printf("Marshaled: %+v", test)
	log.Printf("Unmarshaled:%+v", unTest)
}