Description

I have a situation in API Platform, in which I want to decorate the api_platform.jsonld.normalizer.item and api_platform.hal.normalizer.item with the same decorator. In short, that decorator adds a property to the normalized item.

In #45834, in addition to the configuration of a decorator in the service definition, it's made possible to do this using a PHP attribute #[AsDecorator]. Unfortunately, it's not possible to repeat this attribute.

I've done a quick test making the attribute repeatable, but this results in the decorator applied to the first service being overwritten by the second one, I think because of the same reason as described here: the name of the decorating service is reused. Therefore, this feature requires more work than just making the attribute repeatable: generating (or demanding configuration) unique service names is required.

Example

<?php

namespace App\ApiPlatform\Normalizer;

use App\ApiPlatform\Attribute\HateoasLink;
use Symfony\Component\DependencyInjection\Attribute\AsDecorator;
use Symfony\Component\Routing\RouterInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
use Symfony\Component\Serializer\SerializerAwareInterface;
use Symfony\Component\Serializer\SerializerInterface;

#[AsDecorator('api_platform.jsonld.normalizer.item')]
#[AsDecorator('api_platform.hal.normalizer.item')]
class HateoasLinkNormalizer implements NormalizerInterface, SerializerAwareInterface
{
    public function __construct(
        private readonly NormalizerInterface $decorated,
        private readonly RouterInterface $router,
    ) {
    }

    // ...
}