How to add a schema in my Schema.graphql and then pass resolvers.

[wajidakhterabbasi]

Hello,
I just need some help as I am working on a project where I have to write my type, query and mutation file in the schema.graphql. How can I stitch them all together ? I am trying to write a controller and the structure looks like this
`<?php
declare(strict_types=1);

namespace Api\GraphQL\Controller;

use GraphQL\Language\Parser;
use GraphQL\Utils\BuildSchema;
use Psr\Container\ContainerInterface;

final class GraphQLControllerFactory
{
private const SCHEMA_FILE_PATH = "/Schema/Schema.graphql";
public function __invoke(ContainerInterface $container): GraphQLController
{
$schemaContent = file_get_contents(
dirname(DIR) . self::SCHEMA_FILE_PATH
);
return new GraphQLController(
BuildSchema::build(Parser::parse($schemaContent))
);
}
}
<?php

declare(strict_types=1);

namespace Api\GraphQL\Controller;
use Exception;
use GraphQL\GraphQL;
use GraphQL\Language\Parser;
use GraphQL\Type\Schema;
use Laminas\View\Model\JsonModel;
use Api\Shared\Controller\CommonController;

class GraphQLController extends CommonController
{
public function __construct(private readonly Schema $schema)
{
}

public function indexAction(): JsonModel
{
    $rawInput = file_get_contents('php://input');
    $input = json_decode($rawInput, true);
    $parsedQuery = Parser::parse($input['query'] ?? null);
    $variableValues = $input['variables'] ?? null;
    try {
        $result = GraphQL::executeQuery(
            $this->schema,
            $parsedQuery,
            null,
            null,
            $variableValues,
            null,
            $this->getResolvers()
        );

        $output = $result->toArray();
    } catch (Exception $e) {
        $output = [
            'errors' => [
                ['message' => $e->getMessage()]
            ]
        ];
    }

    return new JsonModel($output);
}


protected function getValidatorConfig(): array
{
    return [
        'all' => [
            'get' => [],
            'post' => [],
        ],
    ];
}

private function getResolvers(): array
{
    return [
        'Query' => [
            'user' => function ($root, $args) {
                $users = [
                    1 => ['id' => 1, 'name' => 'John Doe', 'email' => 'john@example.com'],
                    2 => ['id' => 2, 'name' => 'Jane Doe', 'email' => 'jane@example.com'],
                ];

                return $users[$args['id']] ?? null;
            },
            'posts' => function () {
                // Example: Return an array of posts
                return [
                    ['id' => 1, 'title' => 'First Post', 'content' => 'Content of the first post', 'author' => 1],
                    ['id' => 2, 'title' => 'Second Post', 'content' => 'Content of the second post', 'author' => 2],
                ];
            },
            'Post' => [
                'author' => function ($post) {
                    // Example: Return the author of the post
                    $users = [
                        1 => ['id' => 1, 'name' => 'John Doe', 'email' => 'john@example.com'],
                        2 => ['id' => 2, 'name' => 'Jane Doe', 'email' => 'jane@example.com'],
                    ];

                    return $users[$post['author']] ?? null;
                }
            ]
        ]
    ];

}

}
My Schema.graphql file is like this
type Query {
user(id: ID!): User
posts: [Post]
}

type User {
id: ID!
name: String!
email: String!
}

type Post {
id: ID!
title: String!
content: String!
author: User!
}
The error that I am getting is when I am trying to query my end point reads as
"message": "An error occurred; GraphQL\GraphQL::executeQuery(): Argument #7 ($fieldResolver) must be of type ?callable, array given, called in /src/GraphQL/Controller/GraphQLController.php on line 27",
The query is query GetUserAndPosts {
user(id: 1) {
id
name
email
}
posts {
id
title
content
author {
id
name
}
}
}`
Any help will be much appreciated.