[DX] Form data may be empty in an unexpected way

[Nek-]

Explanation

When a property in the constructor is not filled and the form type has no validation error related, empty data auto-fill may fail silenciously.

SwagIndustries\Melodiia\Doctrine\DoctrineDataStore::save(): Argument #1 ($model) must be of type object, null given, called in /home/manager-app/vendor/swag-industries/melodiia/src/Crud/Controller/Create.php on line 68

Example

Let's take as an example this registration form:

use SwagIndustries\Melodiia\Form\AbstractType;

class RegistrationType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('email', TextType::class, [
                'constraints' => [new NotBlank(), new Email()],
            ])
            ->add('password', TextType::class, ['constraints' => new NotBlank()])
            ->add('username', TextType::class) // optional
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefault('data_class', User::class);
    }
}

With the following User model:

class User
{
public function __construct(
    private string $email, 
    private string $password, 
    private string $username // Required!!
) {}
}

If you provide the following data to the API:

{
  "email": "[email protected]",
  "password": "somepass"
}

Then you will end up with a super weird (but normal because a parameter is missing) 500 error, instead of a validation error.

Solution

I have no out of the fryer option for now. Adding a log would be nice for sure.