[Bug]: MapRequestPayload doesn't handle type with scalar values

[Arkounay]

Version

5.0.0

Description

Hi,

When using MapRequestPayload with a scalar type value, for example "int"

#[Route('/route', methods: ['PATCH'])]
public function patchRoute(#[MapRequestPayload(type: 'int')] array $ids): Response
{
// ...
}

it triggers the following exception:

Schema of type "\int" can't be generated, no describer supports it. Class "\int" does not exist, did you forget a use statement, or typed it wrong?  

in src/Model/ModelRegistry.php (line 131)

JSON OpenApi

No response

Additional context

No response

[mario-fehr]

@Arkounay I am pretty sure that this has nothing to do with the bundle but is an error message directly from Symfony.
MapRequestPayload only can handle classes.

[Arkounay]

Hmm I don't think so? if you send a payload in my example with an array [1, 2, 3] it will work well and be interpreted correctly by symfony, and if you send [1, "str"] it will throw a type error (which is expected)
Type works with scalar values since symfony 7.1
The error is only thrown when Nelmio tries to generate the documentation

[mario-fehr]

Interesting did not know that works. And doku does not mention it. Even the exception message
throw new NearMissValueResolverException(sprintf('Please set the $type argument of the #[%s] attribute to the type of the objects in the expected array.', MapRequestPayload::class)); talks about an object.

I made a reproducer.

@DjordyKoert what would be a good way to check that so we don't try to create a Model from scalar types.

[Arkounay]

Thanks for the reproducer @mario-fehr 👍

If this can help some people, a quick workaround I did for now is this and it seems to be working in my case

#[AutoconfigureTag('nelmio_api_doc.model_describer')]
class NativeTypeDescriber implements ModelDescriberInterface
{
    public function describe(Model $model, \OpenApi\Annotations\Schema $schema): void
    {
        $type = $model->getType()->getClassName();
        if ($type === 'int') {
            $type = 'integer';
        }
        $schema->type = $type;
    }

    public function supports(Model $model): bool
    {
        return $model->getType()->getClassName() === 'int' || $model->getType()->getClassName() === 'string';
    }
}

[DjordyKoert]

Type works with scalar values since symfony 7.1 The error is only thrown when Nelmio tries to generate the documentation

Nelmio does not yet support this, I made a draft PR #2467 with a semi-functional fix.

[Arkounay]

Wow cool, thank you @DjordyKoert