Symfony2 - Dynamic form choices - validation remove

Question

I have a drop down form element. Initially it starts out empty but it is populated with values via javascript after the user has made some interactions. Thats all working

Answer 1

Add this inside buildForm method in your form type class so that you can validate an input field value rather a choice from a select field value;

$builder->addEventListener(
    FormEvents::PRE_SUBMIT,

    function (FormEvent $event) {
        $form = $event->getForm();

        if ($form->has('verified_city')) {
            $form->remove('verified_city');
            $form->add(
                'verified_city', 
                'text', 
                ['required' => false]
            )
        }
    }
);