Pagination is broken when mapping is set

[Spomky]

API Platform version(s) affected: 4.2.8

Description
I have the following Api Resource

<?php

declare(strict_types=1);

namespace Api\ApiResource;

use Api\Entity\Customer as CustomerEntity;
use ApiPlatform\Doctrine\Orm\Filter\PartialSearchFilter;
use ApiPlatform\Doctrine\Orm\State\CollectionProvider;
use ApiPlatform\Doctrine\Orm\State\ItemProvider;
use ApiPlatform\Doctrine\Orm\State\Options;
use ApiPlatform\Metadata\ApiResource;
use ApiPlatform\Metadata\Get;
use ApiPlatform\Metadata\GetCollection;
use ApiPlatform\Metadata\QueryParameter;

#[ApiResource(
    shortName: 'Customer',
    operations: [
        new Get(
            uriTemplate: '/customers/{id}',
            uriVariables: ['id'],
            provider: ItemProvider::class,
        ),
        new GetCollection(
            uriTemplate: '/customers',
            provider: CollectionProvider::class,
            parameters: [
                'name' => new QueryParameter(
                    filter: new PartialSearchFilter(),
                    property: 'name',
                ),
            ],
        ),
    ],
    stateOptions: new Options(CustomerEntity::class),
)]
class Customer
{
    public string $id;
    public string $name;
}

The collection enpoint returns the correct pagination information:

{
  "@context": "/contexts/Customer",
  "@id": "/customers",
  "@type": "Collection",
  "totalItems": 36,
  "member": [
    //Removed for brievety
  ],
  "view": {
    "@id": "/customers?page=1",
    "@type": "PartialCollectionView",
    "first": "/customers?page=1",
    "last": "/customers?page=2",
    "next": "/customers?page=2"
  },
  "search": {
    "@type": "IriTemplate",
    "template": "/customers{?name}",
    "variableRepresentation": "BasicRepresentation",
    "mapping": [
      {
        "@type": "IriTemplateMapping",
        "variable": "name",
        "property": "name",
        "required": false
      }
    ]
  }
}

When I add the #[Map(CustomerEntity::class)] attribute, the pagination is gone and the total number of items is wrong:

{
  "@context": "/contexts/Customer",
  "@id": "/customers",
  "@type": "Collection",
  "totalItems": 30,
  "member": [
    //Removed for brievety
  ],
  "search": {
    "@type": "IriTemplate",
    "template": "/customers{?name}",
    "variableRepresentation": "BasicRepresentation",
    "mapping": [
      {
        "@type": "IriTemplateMapping",
        "variable": "name",
        "property": "name",
        "required": false
      }
    ]
  }
}

How to reproduce
Use the provider above and attribute.

Possible Solution
It looks like the MappedObjectProvider is called and returns an ArrayPaginator and total items or next page are missing.

Additional Context

[Spomky]

I created this paginator:

<?php

declare(strict_types=1);

namespace Acme\Paginator;

use ApiPlatform\State\Pagination\PaginatorInterface;
use Symfony\Component\ObjectMapper\ObjectMapperInterface;

final readonly class MappedResourcePaginator implements \IteratorAggregate, PaginatorInterface
{
    public function __construct(
        private iterable $entities,
        private ObjectMapperInterface $mapper,
        private string $resourceClass,
        private float $totalItems = 0.0,
        private float $currentPage = 1.0,
        private float $lastPage = 1.0,
        private float $itemsPerPage = 30.0,
    ) {}

    public static function fromPaginator(PaginatorInterface $data, ?ObjectMapperInterface $objectMapper, ?string $getClass): self
    {
        return new self(
            iterator_to_array($data),
            $objectMapper,
            $getClass,
            $data->getTotalItems(),
            $data->getCurrentPage(),
            $data->getLastPage(),
            $data->getItemsPerPage(),
        );
    }

    public function count(): int
    {
        return (int) $this->totalItems;
    }

    public function getLastPage(): float
    {
        return $this->lastPage;
    }

    public function getTotalItems(): float
    {
        return $this->totalItems;
    }

    public function getCurrentPage(): float
    {
        return $this->currentPage;
    }

    public function getItemsPerPage(): float
    {
        return $this->itemsPerPage;
    }

    public function getIterator(): \Traversable
    {
        foreach ($this->entities as $entity) {
            yield $this->mapper->map($entity, $this->resourceClass);
        }
    }
}

And replaced locally the line ObjectMapperProvider:55 with

            $data = MappedResourcePaginator::fromPaginator(
                $data,
                $this->objectMapper,
                $operation->getClass(),
            );

It works fine now.

[soyuka]

Thanks!