[Serializer] fix regression where nullable int cannot be serialized

nikophil · nikophil · commit b407e62a058d · 2023-12-04T11:37:27.000+01:00
diff --git a/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
@@ -491,7 +491,7 @@ private function validateAndDenormalize(array $types, string $currentClass, stri
                             }
                             break;
                         case Type::BUILTIN_TYPE_INT:
-                            if (ctype_digit('-' === $data[0] ? substr($data, 1) : $data)) {
+                            if (isset($data[0]) && ctype_digit('-' === $data[0] ? substr($data, 1) : $data)) {
                                 $data = (int) $data;
                             } else {
                                 throw NotNormalizableValueException::createForUnexpectedDataType(sprintf('The type of the "%s" attribute for class "%s" must be int ("%s" given).', $attribute, $currentClass, $data), $data, [Type::BUILTIN_TYPE_INT], $context['deserialization_path'] ?? null);
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/DummyNullableInt.php b/src/Symfony/Component/Serializer/Tests/Fixtures/DummyNullableInt.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Tests\Fixtures;
+
+/**
+ * @author Nicolas PHILIPPE <nikophil@gmail.com>
+ */
+class DummyNullableInt
+{
+    public function __construct(
+        public int|null $value = null
+    )
+    {
+    }
+}
diff --git a/src/Symfony/Component/Serializer/Tests/SerializerTest.php b/src/Symfony/Component/Serializer/Tests/SerializerTest.php
@@ -18,6 +18,7 @@
 use Symfony\Component\PropertyInfo\PropertyInfoExtractor;
 use Symfony\Component\Serializer\Encoder\CsvEncoder;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
+use Symfony\Component\Serializer\Encoder\XmlEncoder;
 use Symfony\Component\Serializer\Exception\ExtraAttributesException;
 use Symfony\Component\Serializer\Exception\InvalidArgumentException;
 use Symfony\Component\Serializer\Exception\LogicException;
@@ -56,6 +57,7 @@
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberOne;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberThree;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyMessageNumberTwo;
+use Symfony\Component\Serializer\Tests\Fixtures\DummyNullableInt;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyObjectWithEnumConstructor;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyObjectWithEnumProperty;
 use Symfony\Component\Serializer\Tests\Fixtures\DummyWithObjectOrNull;
@@ -751,6 +753,16 @@ public function testDeserializeWrappedScalar()
         $this->assertSame(42, $serializer->deserialize('{"wrapper": 42}', 'int', 'json', [UnwrappingDenormalizer::UNWRAP_PATH => '[wrapper]']));
     }
 
+    public function testDeserializeNullableIntInXml()
+    {
+        $extractor = new PropertyInfoExtractor([], [new ReflectionExtractor()]);
+        $serializer = new Serializer([new ObjectNormalizer(null, null, null, $extractor)], ['xml' => new XmlEncoder()]);
+
+        $obj = $serializer->deserialize('<?xml version="1.0" encoding="UTF-8"?><DummyNullableInt><value/></DummyNullableInt>', DummyNullableInt::class, 'xml',);
+        $this->assertInstanceOf(DummyNullableInt::class, $obj);
+        $this->assertNull($obj->value);
+    }
+
     public function testUnionTypeDeserializable()
     {
         $classMetadataFactory = new ClassMetadataFactory(new AttributeLoader());

Original file line number	Diff line number	Diff line change
`@@ -491,7 +491,7 @@ private function validateAndDenormalize(array $types, string $currentClass, stri`
`491`	`491`	`}`
`492`	`492`	`break;`
`493`	`493`	`case Type::BUILTIN_TYPE_INT:`
`494`		`- if (ctype_digit('-' === $data[0] ? substr($data, 1) : $data)) {`
	`494`	`+ if (isset($data[0]) && ctype_digit('-' === $data[0] ? substr($data, 1) : $data)) {`
`495`	`495`	`$data = (int) $data;`
`496`	`496`	`} else {`
`497`	`497`	`throw NotNormalizableValueException::createForUnexpectedDataType(sprintf('The type of the "%s" attribute for class "%s" must be int ("%s" given).', $attribute, $currentClass, $data), $data, [Type::BUILTIN_TYPE_INT], $context['deserialization_path'] ?? null);`