best_db_to_from_db.dart

  Map<String, dynamic> toDb() {
    return {
      'name_title': name.title,
      'name_first': name.first,
      'name_last': name.last,
      'location_street_name': location.street.name,
      'location_street_number': location.street.number.toString(),
      'location_city': location.city,
      'location_state': location.state,
      'location_country': location.country,
      'location_postcode': location.postcode,
      'location_coordinates_latitude': location.coordinates.latitude,
      'location_coordinates_longitude': location.coordinates.longitude,
      'location_timezone_offset': location.timezone.offset,
      'location_timezone_description': location.timezone.description,
      'email': email,
      'login_uuid': login.uuid,
      'login_username': login.username,
      'login_password': login.password,
      'login_salt': login.salt,
      'login_md5': login.md5,
      'login_sha1': login.sha1,
      'login_sha256': login.sha256,
      'dob_date': dob.date.toIso8601String(),
      'dob_age': dob.age,
      'registered_date': registered.date.toIso8601String(),
      'registered_age': registered.age,
      'phone': phone,
      'cell': cell,
      'id_name': id.name,
      'id_value': id.value,
      'picture_large': picture.large,
      'picture_medium': picture.medium,
      'picture_thumbnail': picture.thumbnail,
      'nat': nat,
    };
  }

  UserModel.fromDb(Map data) {
    name = _Name();
    name.title = data['name_title'];
    name.first = data['name_first'];
    name.last = data['name_last'];
    location = _Location();
    location.street = _Street();
    location.street.name = data['location_street_name'];
    location.street.number = int.parse(data['location_street_number']);
    location.city = data['location_city'];
    location.state = data['location_state'];
    location.country = data['location_country'];
    location.postcode = data['location_postcode'];
    location.coordinates = _Coordinates();
    location.coordinates.latitude = data['location_coordinates_latitude'];
    location.coordinates.longitude = data['location_coordinates_longitude'];
    location.timezone = _Timezone();
    location.timezone.offset = data['location_timezone_offset'];
    location.timezone.description = data['location_timezone_description'];
    email = data['email'];
    login = _Login();
    login.uuid = data['login_uuid'];
    login.username = data['login_username'];
    login.password = data['login_password'];
    login.salt = data['login_salt'];
    login.md5 = data['login_md5'];
    login.sha1 = data['login_sha1'];
    login.sha256 = data['login_sha256'];
    dob = _Dob();
    dob.date = DateTime.parse(data['dob_date']);
    dob.age = int.parse(data['dob_age']);
    registered = _Dob();
    registered.date = DateTime.parse(data['registered_date']);
    registered.age = int.parse(data['registered_age']);
    phone = data['phone'];
    cell = data['cell'];
    id = _Id();
    id.name = data['id_name'];
    id.value = data['id_value'];
    picture = _Picture();
    picture.large = data['picture_large'];
    picture.medium = data['picture_medium'];
    picture.thumbnail = data['picture_thumbnail'];
    nat = data['nat'];
  }