PersonFormType1.php

<?php

namespace App\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Routing\RouterInterface;
use App\Model\Person;
use App\Form\Type\Select2Type;

class PersonFormType extends AbstractType {

    public function __construct(RouterInterface $router) {
        $this->router = $router;
    }
    
    public function buildForm(FormBuilderInterface $builder, array $options) {
        $builder
            ->add('job', Select2Type::class, [
                'label' => '¿Cuál es tu profesión?', 
                'required' => true,
                'attr' => ['data-autocomplete-url' => $this->router->generate('search_jobs')],
                'choices' => []
            ])
            ->add('submit', SubmitType::class, [
                'label' => 'Enviar',
                 'attr' => ['class' => 'btn-primary btn-submit']
            ]);
    }
    
     public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(['data_class' => Person::class]);
    }
}