Bloc: Adding parameter

[bobykurniawan11]

I'm following this tutorial https://bloclibrary.dev/#/flutterlogintutorial?id=login-bloc . Now i'm trying to add new parameter for result message .

yield state.copyWith(status: FormzStatus.submissionSuccess, message: "Success");

Below is my whole function

Stream<RegisterState> _mapRegisterSubmittedToState(
    RegisterSubmitted event,
    RegisterState state,
  ) async* {
    if (state.status.isValidated) {
      yield state.copyWith(status: FormzStatus.submissionInProgress);

      FormData data = FormData.fromMap({
        'email': state.email.value,
        'password': state.password.value,
        'phone': state.phone.value,
        'language': 'indonesia'
      });

      try {
        Dio dio = new Dio();

        final process = await dio.post(SourceApi().ipAddress + 'Gate/register/', data: data);
        if (process.statusCode == 200) {
          yield state.copyWith(status: FormzStatus.submissionSuccess, message: "Success");
        } else {
          yield state.copyWith(status: FormzStatus.submissionFailure, message: "Failed");
        }
      } on Exception catch (_) {
        yield state.copyWith(status: FormzStatus.submissionFailure);
      }

      yield state.copyWith(status: FormzStatus.submissionSuccess);
    } else {
      yield state.copyWith(status: FormzStatus.submissionFailure);
    }
  }

when i'm trying to change my state to this

class RegisterState extends Equatable {
  const RegisterState(
      {this.status = FormzStatus.pure,
      this.email = const Email.pure(),
      this.password = const Password.pure(),
      this.phone = const Phone.pure(),
      this.message = message});

  final FormzStatus status;
  final Email email;
  final Password password;
  final Phone phone;
  final String message;

  RegisterState copyWith(
      {FormzStatus status, Email email, Password password, Phone phone, String message}) {
    return RegisterState(
        status: status ?? this.status,
        email: email ?? this.email,
        password: password ?? this.password,
        phone: phone ?? this.phone,
        message: message ?? this.message);
  }

  @override
  List<Object> get props => [status, email, password, phone, message];
}

I get this error

Compiler message:
lib/register/bloc/register_state.dart:9:22: Error: Getter not found: 'message'.
this.message = message});

how can i fix it ?

[felangel]

Hi @bobykurniawan11 👋
Thanks for opening an issue!

It looks like the issue is you're not provided a valid default value to message.

class RegisterState extends Equatable {
  const RegisterState({
      this.status = FormzStatus.pure,
      this.email = const Email.pure(),
      this.password = const Password.pure(),
      this.phone = const Phone.pure(),
      this.message = '', // this was incorrect previously
  });

  final FormzStatus status;
  final Email email;
  final Password password;
  final Phone phone;
  final String message;

  RegisterState copyWith(
      {FormzStatus status, Email email, Password password, Phone phone, String message}) {
    return RegisterState(
        status: status ?? this.status,
        email: email ?? this.email,
        password: password ?? this.password,
        phone: phone ?? this.phone,
        message: message ?? this.message);
  }

  @override
  List<Object> get props => [status, email, password, phone, message];
}

Hope that helps 👍

[bobykurniawan11]

thank you. it is fix my problem