Convert DateTime as TimeStamp using jsonSerializable in Flutter

Question

While we serialize or de-serialize the model using jsonSerializable in Flutter it converts the DateTime as String

class Task {
 final DateTime dateTime;
 final String taskName;

 Task({
  required this.dateTime,
  required this.taskName
 }):
}

Instead of converting as string it should convert as TimeStamp

Answer 1

1. We can annotate the field with @TimeStampConverter

class Task {
 @TimeStampConvertor
 final DateTime dateTime;
 final String taskName;

 Task({
  required this.dateTime,
  required this.taskName
 }):
}

2. Create a class for TimeStampConverter

class TimestampConverter implements JsonConverter<DateTime, Timestamp> {
  const TimestampConverter();

  @override
  DateTime fromJson(Timestamp timestamp) {
    return timestamp.toDate();
  }

  @override
  Timestamp toJson(DateTime date) => Timestamp.fromDate(date);
}