updateTask.go

var t todo
idDoc := bson.D{{"_id", objectIDS}}
err = db.Collection(collName).FindOne(ctx, idDoc).Decode(&t)
if err != nil {
	return "", fmt.Errorf("updateTask: couldn't decode task from db: %v", err)
}
var task string
fmt.Println("old task:", t.Task)
fmt.Print("updated task: ")
for input.Scan() {
	if err := input.Err(); err != nil {
		return "", fmt.Errorf("updateTask: couldn't read task from command line: %v", err)
	}
	task = input.Text()
	if len(strings.Trim(task, " ")) == 0 {
		return "", errors.New("updateTask: can't update a to-do item with no task")
	}
	t.Task = task
	break
}
_, err = db.Collection(collName).UpdateOne(
	ctx,
	idDoc,
	bson.D{
		{"$set", bson.D{{"task", t.Task}}},
		{"$currentDate", bson.D{{"modifiedAt", true}}},
	},
)
if err != nil {
	return "", fmt.Errorf("updateTask: task for to-do list couldn't be created: %v", err)
}