Bloc: Yield no longer rebuilds after an await

Created on 17 Oct 2019  路  4Comments  路  Source: felangel/bloc

Hi,
Here is my states:
abstract class RegistrationFormState extends Equatable {

}

class InitialRegistrationFormState extends RegistrationFormState {
@override
List get props => null;
}
class VerificationLoading extends RegistrationFormState{
@override

List get props => null;

}
class VerificationResult extends RegistrationFormState{
Prisoner prisonerDetails;
VerificationResult(this.prisonerDetails);
@override
List get props => [prisonerDetails];

}

My Bloc:
if(event is VerifyIDNumber){
print("Verifying id number: ${event.idNumber} of type ${event.idType}");
//state.currentStep=1;
yield VerificationLoading();
await Future.delayed(Duration(seconds: 2));
print("Future finished");
yield VerificationResult(Prisoner());
}

the line yield VerificationResult never causes layout to be rebuilt. is there something am doing wrong? Kindly assist.

question
Source
picture kechkibet

Most helpful comment

Hi,
Turns out down the widget tree i was calling bloc.close(); on a dispose method. Turns out we need to close on the same widget that created it only.
Thanks sir.

picture kechkibet on 18 Oct 2019
🚀2 ❤2 🎉2 😄2 👍2

All 4 comments

Hi @kechkibet 馃憢
Thanks for opening an issue!

Can you please try updating your props getters to return an empty list of props like

@override
List get props => [];

For InitialRegistrationFormState and VerificationLoading? Thanks 馃憤

felangel picture felangel on 17 Oct 2019

Hi,
Thanks for the quick response here is my state now:

class InitialRegistrationFormState extends RegistrationFormState {
@override
List get props => [];
}
class VerificationLoading extends RegistrationFormState{
@override

List get props => [];

}
class VerificationResult extends RegistrationFormState{
Prisoner prisonerDetails;
VerificationResult(this.prisonerDetails);
@override
// TODO: implement props
List get props => [prisonerDetails];

}

Here is the log:
I/flutter (23478): Verifying id number: 12312312 of type ID
I/flutter (23478): Verification Loading
I/flutter (23478): Future finished

As you can see the future finishes but the yield doesnt get to ui. Still same issue.

kechkibet picture kechkibet on 18 Oct 2019

@kechkibet can you provide a link to a sample app which illustrates the issue? Thanks!

felangel picture felangel on 18 Oct 2019

Hi,
Turns out down the widget tree i was calling bloc.close(); on a dispose method. Turns out we need to close on the same widget that created it only.
Thanks sir.

kechkibet picture kechkibet on 18 Oct 2019
🚀2 ❤2 🎉2 😄2 👍2
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