edit

Author: soyuka

src/JsonLd/Serializer/ItemNormalizer.php

@@ -124,7 +124,11 @@ public function normalize(mixed $object, ?string $format = null, array $context
             unset($context['operation'], $context['operation_name']);
         }
 
-        $operation = $context['operation'] ?? null;
+        $operation = null;
+        if ($isResourceClass) {
+            $operation = $context['operation'] ?? $this->resourceMetadataCollectionFactory->create($resourceClass)->getOperation();
+        }
+
         if (true === ($context['output']['gen_id'] ?? true) && true === ($context['force_iri_generation'] ?? true) && $iri = $this->iriConverter->getIriFromResource($object, $operation?->getUrlGenerationStrategy() ?? UrlGeneratorInterface::ABS_PATH, $operation, $context)) {
             $context['iri'] = $iri;
             $metadata['@id'] = $iri;
@@ -138,8 +142,6 @@ public function normalize(mixed $object, ?string $format = null, array $context
         }
 
         if (!isset($metadata['@type']) && $isResourceClass) {
-            $operation = $context['operation'] ?? $this->resourceMetadataCollectionFactory->create($resourceClass)->getOperation();
-
             $types = $operation instanceof HttpOperation ? $operation->getTypes() : null;
             if (null === $types) {
                 $types = [$operation->getShortName()];