GraphQL, single custom provider fro all nested data

[bogdandubyk]

API Platform version(s) affected: 3.1.11

Description
So I have a massive resource with a lot of nested data, but all that data should be requested only by the root id, here I'll show a simplified version.
Product :

• id
• shopId
• name
• Facility
  • id
  • name
  • Varaints[]
    - sku
    - on

And as I mentioned all operations should be done only on the product, so if I want to get some data I need to make a query like

{
  product(id: "/products/1", shopId: 234234) {
    id, name, facility {name,variants{
      edges {
        node {
          sku
        }
      }
    }}
  }
}

Additionally, I'm not using doctrine and want all data to come from a single custom provider. All works properly for product and facility but not for variants, I'm getting an error Provider not found on operation \"collection_query\" but I do not want to have a separate provider for variants all that data should come from a main product provider.

How to reproduce
Product

#[ApiResource(
    provider: ProductProvider::class,
    graphQlOperations: [
        new Query(
            args: [
                'id' => [
                    'type' => 'ID!',
                    'description' => 'The ID of the product.',
                ],
                'shopId' => [
                    'type' => 'Int!',
                    'description' => 'The ID of the shop.',
                ],
            ]
        ),
        new QueryCollection(
        ),
    ]
)]
class Product
{
    public function __construct(
        private string       $id,
        private int          $shopId,
        public  string       $name,
        public Facility $facility,
    ){}

    public function getId()
    {
        return $this->id;
    }

    public function getShopId()
    {
        return $this->shopId;
    }
}

Facility (here as I do not want any operations to be performed directly to facility I set empty list as graphQlOperations)

#[ApiResource(graphQlOperations: [],)]
final class Facility
{
    /**
     * @param Variant[] $variants
     */
    public function __construct(
        public int $id,
        public string $$name,
        public array $variants
    )
    {
    }
}

Variant

#[ApiResource(
    graphQlOperations: []
)]
final class Variant
{
    public function __construct(
        public bool $on,
        public string $sku,
    )
    {
    }
}

and Here is ProductProvider

final class ProductProvider implements ProviderInterface
{
    public function provide(Operation $operation, array $uriVariables = [], array $context = []): object|null|array
    {

        $data = ... // logic to get product data
        
     $product = new Product(
            $data['_id'],
            $data['shop_id'],
            $data['name'],
            new Facility(
                $data['facility']['id'],
                explode(',', $data['facility']['name']),
                array_map(
                    fn(array $variant) => new Variant(
                        (bool)$variant['on'],
                        $variant['sku'],
                    ), $data['facility']['variants']
                )
            ),
        );


        if ($operation instanceof QueryCollection) {
            return new ArrayPaginator([$product], 0, 1);
        }

        return $product;

so as mentioned earlier if I run query like this

{
  product(id: "/products/1", shopId: 234234) {
    id, name,, facility {name,variants{
      edges {
        node {
          sku
        }
      }
    }}
  }
}

I'm getting an error Provider not found on operation \"collection_query\", but this query works:

{
  product(id: "/products/586b8f112f7d8059668e5f73", shopId: 234234) {
    id, name, facility {name}
}

Possible Solution
I do not what can be the solution and if it's even a bug, but I do not want to have separate providers and query each sub-data separately, I want all data to come from one provider. I tried to reach out in the Slack channel with a few questions for the last few months and did not get answers to either, so writing here

[bogdandubyk]

I able to make it partially work, by changing Facility and Variant

#[ApiResource(graphQlOperations: [],)]
final class Facility
{
    public array $variants;
    /**
     * @param Variant[] $variants
     */
    public function __construct(
        public int $id,
        public string $$name,
        public array $variants
    )
    {
    }

    public function addVariant(Variant $variant): void
    {
        $this->variants = $variant;
    }
}
}

#[ApiResource(
    graphQlOperations: []
)]
final class Variant
{
    public function __construct(
       public Facility,
        public bool $on,
        public string $sku,
    )
    {
    }
}

Now I can at least get a whole list of variants but now variants are iterable, so I can't query variant structure only get all the variants

[jotwea]

Had a similar issue with nested collections. You might try if #6038 also solves your issue.