Argthtjtr

Following the documentation How to Use a DTO for Writing, I'm getting a 500 validation error:

{

    "@context": "/api/contexts/Error",

    "@type": "hydra:Error",

    "hydra:title": "An error occurred",

    "hydra:description": "Cannot validate values of type "NULL" automatically. Please provide a constraint.",

    ...

The DTO is the same as documented (note the specific namespace):

namespace AcmeInfrastructureDto;



use ApiPlatformCoreAnnotationApiResource;

use SymfonyComponentValidatorConstraints as Assert;



/**

 * @ApiResource(

 *      collectionOperations={

 *          "post"={

 *              "path"="/do-something",

 *          },

 *      },

 *      itemOperations={},

 * )

 */

final class DoSomethingRequest

{

    /**

     * @AssertNotBlank

     * @AssertEmail

     */

    public $email;

}

Here's the configuration:

# api_platform.yaml

api_platform:

    mapping:

        paths:

            - '%kernel.project_dir%/src/Infrastructure/Dto'

Actually, I was calling the endpoint sending FormData encoded payload. It turns out that "API Platform only supports raw documents as request input" (cf. https://api-platform.com/docs/core/form-data/).

Nevertheless, I believe that would be nice to throw a more explicit exception in this case than letting the RecursiveContextualValidator of Symfony handle the case with an obscure message.