[BUG] Index out of range with multiple validators about reactiveui.validation HOT 6 CLOSED

Hey @MovGP0 👋,

Thank you for opening an issue. We will get back to you as soon as we can. Also, check out our Open Collective and consider backing us.

https://opencollective.com/reactiveui

PS.: We offer priority support for all backers. Don't forget to add priority label when you start backing us 😄

ReactiveUI - Open Collective

An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms!

from reactiveui.validation.

Apparently, the validation rules are not saved in the ValidationContext. So, when the validator tries to resolve the validation rule for a specific property, it gets an empty result and the [0] call fails with an IndexOutOfRangeException. It's saver to return .SingleOrDefault() and handle the null case in the calling code; logging an error that says that a handler was not found.

from reactiveui.validation.

@alexmartinezm has indicated that he should be able to hopefully get to these and the other validation bugs in a couple days.

from reactiveui.validation.

ValidationRule not saving the validation in the ValidationContext is still an issue as of ReactiveUI version 10.5.7. I am an beginner with reactive programming and ReactiveUI and am trying to understand. As I see it, the ValidationContext.Add() method adds validations to the _validationSource but not to the _validations readonly observable collection.

I changed (in my private test implementation of ValidationContext):

public ReadOnlyObservableCollection<IValidationComponent> Validations 
           => new ReadOnlyObservableCollection<IValidationComponent>(_ValidationsTest);

// private readonly ReadOnlyObservableCollection<IValidationComponent> _Validations;

private ObservableCollection<IValidationComponent> _ValidationsTest 
          => new ObservableCollection<IValidationComponent>(_ValidationSource.Items);

Now it works. Maybe the DynamicData.ObservableListEx.Bind(out _Validations) call in the constructor makes a mistake, as it's the only possible source.

from reactiveui.validation.

what is the state of this issue? is there any workaround to overcome it until fix?
also, how can i trigger validation on button click?

thanks!

from reactiveui.validation.

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

from reactiveui.validation.