fix(jsonschema): make all required properties optional in PATCH opera…

…tion with 'json' format (#6394)

src/JsonSchema/SchemaFactory.php

@@ -18,6 +18,7 @@
 use ApiPlatform\Metadata\CollectionOperationInterface;
 use ApiPlatform\Metadata\HttpOperation;
 use ApiPlatform\Metadata\Operation;
+use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Property\Factory\PropertyMetadataFactoryInterface;
 use ApiPlatform\Metadata\Property\Factory\PropertyNameCollectionFactoryInterface;
 use ApiPlatform\Metadata\Resource\Factory\ResourceMetadataCollectionFactoryInterface;
@@ -33,6 +34,9 @@
 final class SchemaFactory implements SchemaFactoryInterface, SchemaFactoryAwareInterface
 {
     use ResourceMetadataTrait;
+
+    private const PATCH_SCHEMA_POSTFIX = '.patch';
+
     private ?TypeFactoryInterface $typeFactory = null;
     private ?SchemaFactoryInterface $schemaFactory = null;
     // Edge case where the related resource is not readable (for example: NotExposed) but we have groups to read the whole related object
@@ -88,6 +92,12 @@ public function buildSchema(string $className, string $format = 'json', string $
             return $schema;
         }
 
+        $isJsonMergePatch = 'json' === $format && $operation instanceof Patch && Schema::TYPE_INPUT === $type;
+
+        if ($isJsonMergePatch) {
+            $definitionName .= self::PATCH_SCHEMA_POSTFIX;
+        }
+
         if (!isset($schema['$ref']) && !isset($schema['type'])) {
             $ref = Schema::VERSION_OPENAPI === $version ? '#/components/schemas/'.$definitionName : '#/definitions/'.$definitionName;
             if ($forceCollection || ('POST' !== $method && $operation instanceof CollectionOperationInterface)) {
@@ -136,7 +146,7 @@ public function buildSchema(string $className, string $format = 'json', string $
             }
 
             $normalizedPropertyName = $this->nameConverter ? $this->nameConverter->normalize($propertyName, $inputOrOutputClass, $format, $serializerContext) : $propertyName;
-            if ($propertyMetadata->isRequired()) {
+            if ($propertyMetadata->isRequired() && !$isJsonMergePatch) {
                 $definition['required'][] = $normalizedPropertyName;
             }