An API has been created to allow Posts to be created with a description and any number of attached Photos.
The problem was that when an API request to edit a Post was received with a null description the typehint would fail.
class Post {
/**
* @Assert\NotBlank
* @ORM\Column(type="text")
*/
private $description;
/**
* @ORM\ManyToMany(targetEntity="App\Entity\Photo")
*/
private $photos;
public function setDescription(string $descripton)
Which means instead of the Symfony validation failing Assert\NotBlank it was returning a 500.
This could have been fixed by allowing nulls in the method ?string, this would allow the validation to be called, but result in a dirty entity.
The DTO (Data Transfer Object) approach, a new class to represent the data was created and the validation rules applied to this, this was then added to the form.
class PostData {
/**
* @Assert\NotBlank
*/
public $description;
/**
* @Assert\Valid
* @var Photo[]
*/
public $photos;
The form has was modified:
class PostType extends AbstractType {
public function buildForm(FormBuilderInterface $builder, array $options)
$builder
->add('description')
->add('photos', EntityType::class, [
'class' => Photo::class,
'multiple' => true,
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => PostData::class,
));
}
This worked for description it could be validated without changing the Post entity. If a null was received PostData would trigger the Assert\NotBlank and Post::setDescription would not be called with null.
The problem came when trying to validate Photos existed, if the photo existed it would work, if it didn't there would be a 500 error.
Potentially meaningless 500 error which doesn't indicate the reason
Checking only for cacheable HTTP methods with Symfony\Component\HttpFoundation\Request::isMethodSafe() is not supported. (500 Internal Server Error)
How can I use DTO PostData to validate a Photo entity exists?
