Graphqlbundle: Relay connection configuration

[apoberez]

| Q | A
| ---------------- | -----
| Bug report? | no
| Feature request? | no
| BC Break report? | no
| RFC? | yes
| Version/Branch | master

Can someone help with connection configuration, I want to configure following relay connection:

Query:
    type: object
    config:
        fields:
            allLinks:
                type: LinkConnection!
                argsBuilder: "Relay::Connection"
                resolve: '@=resolver("allLinks", [args])'
            viewer:
                type: Viewer!
                resolve: []
            node:
                builder: 'Relay::Node'
                builderConfig:
                    nodeInterfaceType: Node
                    idFetcher: '@=resolver("node_id_fetcher", [value])'

Node:
    type: relay-node
    config:
        resolveType: '@=resolver("node_type", [value])'

LinkConnection:
    type: relay-connection
    config:
        nodeType: Link

Now my query is:

{
  allLinks {
    edges {
      cursor
      node {
        __typename
        id
      }
    }
    pageInfo {
      hasPreviousPage
      startCursor
    }
  }
}

Should I prepare Connection object in allLinks resolver using paginator or there is better solution using type config and return plain array with entities from resolver?

[apoberez]

My solution is

class LinkResolver
{
    /**
     * @var RegistryInterface
     */
    private $doctrine;

    /**
     * LinkResolver constructor.
     * @param RegistryInterface $doctrine
     */
    public function __construct(RegistryInterface $doctrine)
    {
        $this->doctrine = $doctrine;
    }

    public function getAll(Argument $args)
    {
        $linkRepository = $this->doctrine
            ->getManager()
            ->getRepository(Link::class);

        $paginator = new Paginator(
            function ($offset, $limit) use ($linkRepository, $args) {
                return $linkRepository->findByFilter($offset, $limit, $args);
            }
        );

        return $paginator->auto($args, $linkRepository->getTotal());
    }
}