Lighthouse: v4: Subscriptions are not registered after the initial request

[spawnia]

Copied from @alberthaff

I'm getting the same error with v. 4.0-alpha.3. The field notificationCreated is visible in GraphiQL. It seems like SubscriptionRegistry::register() is never called.

Schema:

type Subscription {
    notificationCreated: Notification
}

I have created a test-command, that fires:

$data = Notification::find('dff9c576-8514-4380-9033-50fdaa4b2f8c');
Nuwave\Lighthouse\Execution\Utils\Subscription::broadcast('notificationCreated', $data);

Exception:

In Subscription.php line 36:

  [InvalidArgumentException]                                
  No subscription field registered for notificationCreated  


Exception trace:
 () at /Users/alberthaff/git/project/vendor/nuwave/lighthouse/src/Execution/Utils/Subscription.php:36
 Nuwave\Lighthouse\Execution\Utils\Subscription::broadcast() at /Users/alberthaff/git/project/app/Console/Commands/NotifyTest.php:54
 App\Console\Commands\NotifyTest->handle() at n/a:n/a
 call_user_func_array() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:29
 Illuminate\Container\BoundMethod::Illuminate\Container\{closure}() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:87
 Illuminate\Container\BoundMethod::callBoundMethod() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:31
 Illuminate\Container\BoundMethod::call() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Container/Container.php:572
 Illuminate\Container\Container->call() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Console/Command.php:183
 Illuminate\Console\Command->execute() at /Users/alberthaff/git/project/vendor/symfony/console/Command/Command.php:255
 Symfony\Component\Console\Command\Command->run() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Console/Command.php:170
 Illuminate\Console\Command->run() at /Users/alberthaff/git/project/vendor/symfony/console/Application.php:908
 Symfony\Component\Console\Application->doRunCommand() at /Users/alberthaff/git/project/vendor/symfony/console/Application.php:269
 Symfony\Component\Console\Application->doRun() at /Users/alberthaff/git/project/vendor/symfony/console/Application.php:145
 Symfony\Component\Console\Application->run() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Console/Application.php:89
 Illuminate\Console\Application->run() at /Users/alberthaff/git/project/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:122
 Illuminate\Foundation\Console\Kernel->handle() at /Users/alberthaff/git/project/artisan:35

@spawnia root cause

I suspect this is happening because as of v4, fields are no longer eagerly constructed but rather lazily loaded when needed. This results in the Subscription fields not getting registered after the initial request.

We should add a trigger to the SubscriptionServiceProvider that ensures that the fields are always registered, as subscriptions may need to be triggered even when not resolving a GraphQL request. For example when using the Subscription::broadcast() helper.

[mwienk]

I think this also results in a 403 on the /graphql/subscriptions/auth endpoint because NuwaveLighthouseSubscriptionsSubscriptionRegistry has nothing in the $subscriptions array (which then eventually results in a NotFoundSubscription check, which fails on authentication).

[ddedic]

What's the status of this problem? Still not fixed?

[spawnia]

What's the status of this problem? Still not fixed?

This is a free and open-source project. You can contribute a fix.