Support php7.4 nullable typed properties for JMS serializer.

ModelDescriber/JMSModelDescriber.php

@@ -126,6 +126,7 @@ public function describe(Model $model, OA\Schema $schema)
                 } catch (\ReflectionException $ignored) {
                 }
             }
+            $this->checkRequiredFields($reflections, $schema, $name);
             if (null !== $item->setter) {
                 try {
                     $reflections[] = new \ReflectionMethod($item->class, $item->setter);
@@ -346,4 +347,36 @@ private function propertyTypeUsesGroups(array $type)
             return null;
         }
     }
+
+    /**
+     * Mark property as required if it is not nullable.
+     *
+     * @param array $reflections
+     * @param \OpenApi\Annotations\Schema $schema
+     * @param string $name
+     */
+    public function checkRequiredFields(array $reflections, OA\Schema $schema, string $name): void
+    {
+        foreach ($reflections as $reflection) {
+            $nullable = false;
+            if ($reflection instanceof \ReflectionProperty) {
+                $type = PHP_VERSION_ID >= 70400 ? $reflection->getType() : null;
+                if (null !== $type && !$type->allowsNull()) {
+                    $nullable = true;
+                }
+            } elseif ($reflection instanceof \ReflectionMethod) {
+                $returnType = $reflection->getReturnType();
+                if (null !== $returnType && !$returnType->allowsNull()) {
+                    $nullable = true;
+                }
+            }
+            if ($nullable) {
+                $required = Generator::UNDEFINED !== $schema->required ? $schema->required : [];
+                $required[] = $name;
+
+                $schema->required = $required;
+                break;
+            }
+        }
+    }
 }

Tests/Functional/Controller/JMSController.php

@@ -15,6 +15,7 @@
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSComplex;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSDualComplex;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSNamingStrategyConstraints;
+use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSTyped;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\JMSUser;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\NestedGroup\JMSChat;
 use Nelmio\ApiDocBundle\Tests\Functional\Entity\NestedGroup\JMSChatRoomUser;
@@ -136,4 +137,16 @@ public function minUserAction()
     public function minUserNestedAction()
     {
     }
+
+    /**
+     * @Route("/api/jms_typed", methods={"GET"})
+     * @OA\Response(
+     *     response=200,
+     *     description="Success",
+     *     @Model(type=JMSTyped::class)
+     * )
+     */
+    public function typedAction()
+    {
+    }
 }

Tests/Functional/Entity/JMSTyped.php

@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of the NelmioApiDocBundle package.
+ *
+ * (c) Nelmio
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\ApiDocBundle\Tests\Functional\Entity;
+
+use JMS\Serializer\Annotation as Serializer;
+use Nelmio\ApiDocBundle\Annotation\Model;
+use OpenApi\Annotations as OA;
+
+class JMSTyped
+{
+    /**
+     * @Serializer\Type("integer")
+     */
+    private int $id;
+
+    /**
+     * @OA\Property(ref=@Model(type=JMSUser::class))
+     * @Serializer\SerializedName("user")
+     */
+    private JMSUser $User;
+
+    /**
+     * @Serializer\Type("string")
+     */
+    private ?string $name;
+
+    /**
+     * @Serializer\VirtualProperty
+     * @OA\Property(ref=@Model(type=JMSUser::class))
+     */
+    public function getVirtualFriend(): JMSUser
+    {
+    }
+}

Tests/Functional/JMSFunctionalTest.php

@@ -339,4 +339,26 @@ protected static function createKernel(array $options = []): KernelInterface
     {
         return new TestKernel(TestKernel::USE_JMS);
     }
+
+    public function testModelTypedDocumentation()
+    {
+        if (PHP_VERSION_ID < 70400) {
+            $this->markTestSkipped('PHP 7.4 required.');
+        }
+        $this->assertEquals([
+            'type' => 'object',
+            'properties' => [
+                'id' => ['type' => 'integer'],
+                'user' => ['$ref' => '#/components/schemas/JMSUser'],
+                'name' => ['type' => 'string'],
+                'virtual_friend' => ['$ref' => '#/components/schemas/JMSUser'],
+            ],
+            'required' => [
+                'virtual_friend',
+                'id',
+                'user',
+            ],
+            'schema' => 'JMSTyped',
+        ], json_decode($this->getModel('JMSTyped')->toJson(), true));
+    }
 }