fix(readlistner): fix error 500 on not existing entity

Author: KDederichs

features/authorization/deny.feature

@@ -211,6 +211,13 @@ Feature: Authorization checking
     And the response should contain "ownerOnlyProperty"
     And the JSON node "ownerOnlyProperty" should be equal to the string "updated"
 
+  Scenario: An non existing entity should return Not found
+    When I add "Accept" header equal to "application/ld+json"
+    And I add "Content-Type" header equal to "application/ld+json"
+    And I add "Authorization" header equal to "Basic ZHVuZ2xhczprZXZpbg=="
+    And I send a "GET" request to "/secured_dummies/40000/related"
+    Then the response status code should be 404
+
   Scenario: An user can get related linked dummies for an secured dummy they own
     Given there are 1 SecuredDummy objects owned by dunglas with related dummies
     When I add "Accept" header equal to "application/ld+json"

src/Symfony/EventListener/ReadListener.php

@@ -100,10 +100,12 @@ public function onKernelRequest(RequestEvent $event): void
                 if (!$uriVariable instanceof Link || !$uriVariable->getSecurity()) {
                     continue;
                 }
-                $operationUriVariables = $uriVariable->getIdentifiers();
                 $relationClass = $uriVariable->getFromClass();
                 try {
                     $tmp = $this->provider->provide($this->resourceMetadataCollectionFactory->create($relationClass)->getOperation(null, false, true), [$uriVariable->getIdentifiers()[0] => $parameters[$key]], $context);
+                    if (null === $tmp) {
+                        throw new NotFoundHttpException('Not Found');
+                    }
                     $request->attributes->set($uriVariable->getToProperty(), $tmp);
                 } catch (InvalidIdentifierException|InvalidUriVariableException $e) {
                     throw new NotFoundHttpException('Invalid identifier value or configuration.', $e);