[LiveForm] $this->formValues doesn't work

[GrinWay]

Bug:

When I change payload from frontend with $this->formValues I expect the form to be rerendered with changed data, BUT form renders as though I didn't change the payload wiht this->formValues

Description:

I have a live form, then type something (for triggering an AJAX), method instantiateForm is called and in this method I change user's payload with $this->formValues live prop, then I expect to see changes accrdingly my changes in $this->formValues live prop, BUT I see data that haven't been changed.

Reproduce:

CustomFormType

public function buildForm(FormBuilderInterface $builder, array $options): void
{
    $builder->add('plannedAt', DateTimeType::class, ['widget' => 'choice']);
}

LiveFormClass

#[AsLiveComponent]
class LiveFormClass extends AbstractController {
    #[LiveProp]
    public ?Order $initialFormData = null;

    protected function instantiateForm(): FormInterface
    {
        $this->setMinimumAvailablePlannedAtToTheFrontendPayload();
        return $this->createForm(CustomFormType::class, $this->initialFormData);
    }

    private function setMinimumAvailablePlannedAtToTheFrontendPayload(): void
    {
          // CHANGE PAYLOAD DATA TO MAKE THE FORM TO BE RERENDERED DIFFERENTLY, BUT IT DOESN'T WORK
          $this->formValues['plannedAt']['date']['year'] = '2000';
    }
}

Maybe it's because of DateTimeType?!

[GrinWay]

I was on symfony 7.2 and live components 2.3
But later used symfony 6.4.18 and live component 2.8
Useless, nothing helped, still breaking my head how to refresh the form view BUT I have a valid model data (2000 year in the entity)
But not in the form view🥸

[GrinWay]

I noticed that form field (using ComponentWithFormTrait) doesn't change itself when it's selected... strange

[smnandre]

I'm sorry, but I'm not sure I fully understand what you were trying to do. However, I'm fairly certain this isn't a documented feature :)

So the 'bug' classification might be a bit... overstated.

Now, here is some part that may interest you: https://symfony.com/bundles/ux-live-component/current/index.html#dynamically-updating-the-form-in-a-liveaction