Remaining Relationships

Okay, we now have our user type connected to the related jobs. So let's finish up the rest of our relationships.

Create Connections

Let's create a connection for Job -> Tasks and Tasks -> Assigned Users.

$ php artisan lighthouse:connection JobTasksConnection
$ php artisan lighthouse:connection TaskUsersConnection

JobTasksConnection Class

// app/Http/GraphQL/Connections/JobTasksConnection.php

namespace App\Http\GraphQL\Connections;

use GraphQL\Type\Definition\ResolveInfo;
use Nuwave\Lighthouse\Support\Interfaces\Connection;

class JobTasksConnection implements Connection
{

    /**
     * Get the name of the connection.
     * Note: Connection names must be unique
     *
     * @return string
     */
    public function name()
    {
        return 'JobTasksConnection';
    }

    /**
     * Get name of connection.
     *
     * @return string
     */
    public function type()
    {
        return 'task';
    }

    /**
     * Available connection arguments.
     *
     * @return array
     */
    public function args()
    {
        return [];
    }

    /**
     * Resolve connection.
     *
     * @param  \App\Job  $parent
     * @param  array  $args
     * @param  mixed  $context
     * @param  ResolveInfo $info
     * @return mixed
     */
    public function resolve($parent, array $args, $context, ResolveInfo $info)
    {
        return $parent->tasks()->getConnection($args);
    }
}

TaskUsersConnection Class

// app/Http/GraphQL/Connections/JobTasksConnection.php

namespace App\Http\GraphQL\Connections;

use GraphQL\Type\Definition\ResolveInfo;
use Nuwave\Lighthouse\Support\Interfaces\Connection;

class TaskUsersConnection implements Connection
{

    /**
     * Get the name of the connection.
     * Note: Connection names must be unique
     *
     * @return string
     */
    public function name()
    {
        return 'TaskUsersConnection';
    }

    /**
     * Get name of connection.
     *
     * @return string
     */
    public function type()
    {
        return 'user';
    }

    /**
     * Available connection arguments.
     *
     * @return array
     */
    public function args()
    {
        return [];
    }

    /**
     * Resolve connection.
     *
     * @param  \App\Task  $parent
     * @param  array  $args
     * @param  mixed  $context
     * @param  ResolveInfo $info
     * @return mixed
     */
    public function resolve($parent, array $args, $context, ResolveInfo $info)
    {
        return $parent->users()->getConnection($args);
    }
}

Update JobType Fields

// app/Http/GraphQL/Types/JobType.php

use App\Http\GraphQL\Connections\JobTasksConnection;

class JobType extends GraphQLType implements RelayType
{
    // ...

    /**
     * Type fields.
     *
     * @return array
     */
    public function fields()
    {
        return [
            'title' => [
                'type' => Type::string(),
                'description' => 'Title of the job.',
            ],
            'user' => [
                'type' => GraphQL::type('user'),
                'description' => 'User who created the job.',
                'resolve' => function ($parent, array $args) {
                    return $parent->user;
                }
            ],
            'tasks' => GraphQL::connection(new JobTasksConnection)->field(),
        ];
    }
}

Update TaskType Fields

// app/Http/GraphQL/Types/TaskType.php

use App\Http\GraphQL\Connections\TaskUsersConnection;

class TaskType extends GraphQLType implements RelayType
{
    // ...

    /**
     * Type fields.
     *
     * @return array
     */
    public function fields()
    {
        return [
            'title' => [
                'type' => Type::string(),
                'description' => 'Title of the job task.',
            ],
            'users' => GraphQL::connection(new TaskUsersConnection)->field(),
        ];
    }
}