How to make Select from array in Symfony Entity - php

Question

I'm new to symfony and still learning, my question is how do I populate a select drop-down in a form with an static array of choices. Say I have a class named Cake, I'd like to be able to fill a drop-down for the status of Cake from the array statuses created in the same CakeEntity:
<?php
namespace App\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity(repositoryClass="App\Repository\CakeRepository")
*/
class Cake
{
/**
* #ORM\Column(type="string", length=50)
*/
private $status;
private $statuses = array(
'not_ready' => 'Not Ready',
'almost_ready' => 'Almost Ready',
'ready'=>'Ready',
'too_late'=>'Too late'
);
public function getStatus(): ?string
{
return $this->status;
}
public function setStatus(string $status): self
{
$this->status = $status;
return $this;
}
public function getStatuses()
{
return $this->statuses;
}
}
My Controller looks like:
namespace App\Controller;
use App\Entity\Cake;
use App\Form\CakeType;
use App\Repository\CakeRepository;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
/**
* #Route("/cake")
*/
class CakeController extends AbstractController
{
/**
* #Route("/new", name="cake_new", methods={"GET","POST"})
*/
public function new(Request $request): Response
{
$cake = new Cake();
$form = $this->createForm(CakeType::class, $cake);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$cake->setCreatedAt(\DateTime::createFromFormat('d-m-Y', date('d-m-Y')));
$cake->setCreatedBy(1);
$entityManager = $this->getDoctrine()->getManager();
$entityManager->persist($cake);
$entityManager->flush();
return $this->redirectToRoute('cake_index');
}
return $this->render('cake/new.html.twig', [
'cake' => $cake,
'form' => $form->createView(),
]);
}
My CakeEntity:
<?php
namespace App\Form;
use App\Entity\cake;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\CollectionType;
class CakeType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
->add('status', ChoiceType::class,
[
'choices'=>function(?Cake $cake) {
return $cake->getStatuses();
}
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Cake::class,
]);
}
}
When trying to browse /cake/new I get the error:
An error has occurred resolving the options of the form "Symfony\Component\Form\Extension\Core\Type\ChoiceType": The option "choices" with value Closure is expected to be of type "null" or "array" or "\Traversable", but is of type "Closure".

Answer 1

You could declare getStatuses on Cake as static, or use public constants. E.g.:
class Cake
{
// with static variables
private static $statuses = [
'not_ready' => 'Not Ready',
'almost_ready' => 'Almost Ready',
'ready' => 'Ready',
'too_late' => 'Too late',
];
public static function getStatuses()
{
return self::$statuses;
}
// or with public const
public const STATUSES = [
'not_ready' => 'Not Ready',
'almost_ready' => 'Almost Ready',
'ready' => 'Ready',
'too_late' => 'Too late',
];
}
This seems reasonable, as the return value is not instance but class specific.
You could then use:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('status', ChoiceType::class, [
'choices'=> Cake::getStatuses(),
]);
// or
$builder->add('status', ChoiceType::class, [
'choices'=> Cake::STATUSES,
]);
}
If the choices actually depend on a given Cake instance, you could pass it via the options array or use form events.