fix(serializer): fetch type on normalization error when possible (#6761)

Author: alexndlm

features/main/validation.feature

@@ -114,11 +114,11 @@ Feature: Using validations groups
       "@context": "/contexts/ConstraintViolationList",
       "@type": "ConstraintViolationList",
       "hydra:title": "An error occurred",
-      "hydra:description": "This value should be of type unknown.\nqux: This value should be of type string.\nfoo: This value should be of type bool.\nbar: This value should be of type int.\nuuid: This value should be of type uuid.\nrelatedDummy: This value should be of type array|string.\nrelatedDummies: This value should be of type array.",
+      "hydra:description": "baz: This value should be of type string.\nqux: This value should be of type string.\nfoo: This value should be of type bool.\nbar: This value should be of type int.\nuuid: This value should be of type uuid.\nrelatedDummy: This value should be of type array|string.\nrelatedDummies: This value should be of type array.",
       "violations": [
         {
-          "propertyPath": "",
-          "message": "This value should be of type unknown.",
+          "propertyPath": "baz",
+          "message": "This value should be of type string.",
           "code": "ba785a8c-82cb-4283-967c-3cf342181b40",
           "hint": "Failed to create object because the class misses the \"baz\" property."
         },

src/Serializer/AbstractItemNormalizer.php

@@ -351,7 +351,20 @@ protected function instantiateObject(array &$data, string $class, array &$contex
                         $missingConstructorArguments[] = $constructorParameter->name;
                     }
 
-                    $exception = NotNormalizableValueException::createForUnexpectedDataType(\sprintf('Failed to create object because the class misses the "%s" property.', $constructorParameter->name), $data, ['unknown'], $context['deserialization_path'] ?? null, true);
+                    $attributeContext = $this->getAttributeDenormalizationContext($class, $paramName, $context);
+                    $constructorParameterType = 'unknown';
+                    $reflectionType = $constructorParameter->getType();
+                    if ($reflectionType instanceof \ReflectionNamedType) {
+                        $constructorParameterType = $reflectionType->getName();
+                    }
+
+                    $exception = NotNormalizableValueException::createForUnexpectedDataType(
+                        \sprintf('Failed to create object because the class misses the "%s" property.', $constructorParameter->name),
+                        null,
+                        [$constructorParameterType],
+                        $attributeContext['deserialization_path'] ?? null,
+                        true
+                    );
                     $context['not_normalizable_value_exceptions'][] = $exception;
                 }
             }