如何在创建表单时传递选项

Question

I'm working on a form and want to pass to my form an array that would content all my projects so that my form would have a select with all of those project for option.

I already reed alot of answer, but I just can't figure this thing out. I know that I'm suppose to do something like:

$formulaire=$this->createForm(new ModifierSupprimerProjet(), null, $myArray);

but, I'm suppose to add all the content of my array to getDefaultOptions()... I do I do that? An other thing, what is suppose to be the second parameters of the createForm method?

Here is the post that that came the closest to solve my probleme:

Accessing a variable through $options in the buildForm()

Answer 1

The best way to populate select form element with Project entities is to use entity form field. So you don't have to pass any options to form type class.

$builder
    ->add('project', 'entity', [
        'label'         => 'form.project',
        'class'         => 'AppBundle\Entity\Project',
        'property'      => 'name',
        'required'      => true,
        'empty_value'   => 'form.select_empty_value',
        'query_builder' => function($repository) {
            return $repository->createQueryBuilder('p')->add('orderBy', 'p.name ASC');
        },
    ])
;

If you need to populate choice field there is another best practice. You should define your form type class as service and inject Entity Manager into it. So you could fetch any data from the database and populate any choice fields.

services.xml

<service id="app.form.modifier_supprimer_projet" class="AdminBundle\Form\ModifierSupprimerProjet">
    <tag name="form.type" alias="app_modifier_supprimer_projet" />
    <argument type="service" id="doctrine.orm.entity_manager"/>
</service>

ModifierSupprimerProjet.php

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Doctrine\ORM\EntityManager;

class ModifierSupprimerProjet extends AbstractType
{
    /**
     * @var EntityManager
     */
    protected $em;

    /**
     * @param EntityManager $em
     */
    public function __construct(EntityManager $em)
    {
        $this->em = $em;
    }

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('project', 'choice', [
                'label'   => 'form.project',
                'choices' => $this->em->getRepository('AppBundle:Project')->getProjectsList(),
            ])
        ;
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults([    
            'data_class' => 'AppBundle\Entity\ModifierSupprimerProjet',
        ]);     
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'app_modifier_supprimer_projet';
    }
}

Controller

$modifierSupprimerProjet = new ModifierSupprimerProjet();

$form = $this->createForm('app_modifier_supprimer_projet', $modifierSupprimerProjet);

Second param of createForm method is Entity, if your form is mapped to any entity.