[Bug]: Object of class Nelmio\ApiDocBundle\Annotation\Model could not be converted to string about nelmioapidocbundle

[DjordyKoert]

it seems like Symfony's routing component is struggling to parse your annotations. I am assuming this is happening because of some custom logic that you have written to generate your routes (in ApiRouteDescriber/ApiRouteAnnotationLoader?)

[Herdion]

I just joined this project and was tasked with upgrading and I'm facing this error.
So the code wasn't written by me.

In the previous version in symfony 5.2, everything worked

Below I am attaching screenshots of the ApiRouteDescriber/ApiRouteAnnotationLoader you mentioned.

Do you need any more photos, unfortunately I cannot share the code of the project as a whole because it is the property of the company.

Maybe with your help I will be able to solve this problem that I have been stuck on for another day.

[DjordyKoert]

I can only recommend you to debug Symfony's internals and start working from the source of the error (symfony/routing/Loader/AttributeClassLoader.php:219). Debug the 4 different variables that are used on that line and work from there https://github.com/symfony/routing/blob/f2591fd1f8c6e3734656b5d6b3829e8bf81f507c/Loader/AttributeClassLoader.php#L219

I assume that the ApiRouteAnnotationLoader is extending https://github.com/symfony/routing/blob/6.4/Loader/AnnotationClassLoader.php with an alias of AnnotatedRouteControllerLoader which in turn extends https://github.com/symfony/routing/blob/6.4/Loader/AttributeClassLoader.php. If I am correct then the source of the error might be coming from the parent::addRoute(...) method call that is happening.

Hope my small insight can help you!

[DjordyKoert]

I will go ahead and close this now :)