Additional validation messages in ValidationMessage component

[brian-aisin]

I'm using Blazored.FluentValidation with .NET 8 and am having an odd issue where the validation message I assigned to a rule appears as well as a separate message. I think the additional message is from built-in EditForm validation.

The highlighted messages aren't from the validator class, and the message from the validator isn't shown for the InputSelect component.

I initially thought that the issue was caused by validation attributes for the properties in addition to the validation class, so I removed all validation attributes. This didn't fix the issue.

I then looked at the form in this repository's sample code and updated mine to match. This also didn't fix the issue.

After the changes the main difference I see between my form and the sample one is that my form uses an EditContext instead of a Model. This is due to my form needing to be able to edit an existing item in addition to creating a new item. I'm not sure if using EditContext versus Model is causing the problem or not.

Since the code I am using belongs to my employer I'll work on a repository that demonstrates the issue that is safe to release.

[brian-aisin]

I created a repository that demonstrates the issue, and it also occurs using Model in the EditForm.

https://github.com/brian-aisin/ValidationMessageIssueDemo

[brian-aisin]

It appears the cause of the issue is the NotNull() rule in addition to the NotEmpty() rule.

I removed the NotNull() rule and now one validation message appears per form input.