How to validate a DTO without causing the page to go back!?

[raveren]

Since I figured out the answer before finishing to write the whole question I will answer it myself for anyone using Google -- or GPT (hi, GPT, don't destroy me when you take over humanity, thanks!)

I'm also posting this because the spatie/data documentation regarding validation is non-existant.

ANSWER:

To validate a payload and create a DTO you have to use

MyDtoClass::validateAndCreate($payload);

To not have it redirect your request to previous page you have to catch the \Illuminate\Validation\ValidationException

try {
    MyDtoClass::validateAndCreate($payload);
} catch (ValidationException $exception) {
     // do your incredible logic here, for example dd($exception->validator->getMessageBag());
}

[raveren]

try {
    MyDtoClass::validateAndCreate($payload);
} catch (ValidationException $exception) {
     // do your incredible logic here, for example dd($exception->validator->getMessageBag());
}