take dunglas comments

Author: Amrouche Hamza

src/Serializer/ItemNormalizer.php

@@ -39,9 +39,10 @@ public function denormalize($data, $class, $format = null, array $context = [])
                 foreach ($this->propertyNameCollectionFactory->create($context['resource_class'], $context) as $propertyName) {
                     if (true === $this->propertyMetadataFactory->create($context['resource_class'], $propertyName)->isIdentifier()) {
                         $identifier = $propertyName;
+                        break;
                     }
                 }
-                $context['object_to_populate'] = $this->iriConverter->getItemFromIri($this->iriConverter->getIriFromResourceClass($context['resource_class']).'/'.$data[$identifier], $context + ['fetch_data' => false]);
+                $context['object_to_populate'] = $this->iriConverter->getItemFromIri(sprintf('%s/%s', $this->iriConverter->getIriFromResourceClass($context['resource_class']), $data[$identifier]), $context + ['fetch_data' => false]);
             }
         }