fix(symfony): include value-object transformers in JSON-LD streamer locator

Symfony 8.1 split json_streamer.value_transformer into property_value_transformer
and value_object_transformer. The custom JSON-LD JsonStreamReader/Writer bypassed
Symfony's TransformerPass, so DateTimeInterface (and other value objects) were
missing from its locator — making the generator emit a Splitter::splitDict call
on date-time strings ("JSON is not valid").

Author: soyuka

src/Symfony/Bundle/ApiPlatformBundle.php

@@ -21,6 +21,7 @@
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\FilterPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\GraphQlResolverPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\GraphQlTypePass;
+use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\JsonStreamerTransformerPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\MetadataAwareNameConverterPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\MutatorPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\SerializerMappingLoaderPass;
@@ -59,5 +60,7 @@ public function build(ContainerBuilder $container): void
         $container->addCompilerPass(new AuthenticatorManagerPass());
         $container->addCompilerPass(new SerializerMappingLoaderPass());
         $container->addCompilerPass(new MutatorPass());
+        // Must run after Symfony's TransformerPass so we can rely on the value_object_transformer tag being processed.
+        $container->addCompilerPass(new JsonStreamerTransformerPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, -10);
     }
 }

src/Symfony/Bundle/DependencyInjection/Compiler/JsonStreamerTransformerPass.php

@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Propagates the transformers locator built by Symfony's JsonStreamer TransformerPass —
+ * which merges "json_streamer.property_value_transformer" and "json_streamer.value_object_transformer"
+ * services — onto API Platform's custom JSON-LD stream reader/writer.
+ *
+ * Without this, those custom services keep their initial tagged_locator argument and value
+ * object transformers (DateTime, DateInterval, DateTimeZone) are missing from their locator,
+ * which makes the JsonStreamer 8.1+ PhpGenerator fall back to a regular object provider that
+ * calls Splitter::splitDict on date-time strings — "JSON is not valid".
+ *
+ * @internal
+ */
+final class JsonStreamerTransformerPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container): void
+    {
+        if (!$container->hasDefinition('api_platform.jsonld.json_streamer.stream_reader')
+            || !$container->hasDefinition('json_streamer.stream_reader')) {
+            return;
+        }
+
+        $transformersArgument = $container->getDefinition('json_streamer.stream_reader')->getArgument(0);
+
+        $container->getDefinition('api_platform.jsonld.json_streamer.stream_reader')->replaceArgument(0, $transformersArgument);
+        $container->getDefinition('api_platform.jsonld.json_streamer.stream_writer')->replaceArgument(0, $transformersArgument);
+    }
+}

tests/Symfony/Bundle/ApiPlatformBundleTest.php

@@ -22,6 +22,7 @@
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\FilterPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\GraphQlResolverPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\GraphQlTypePass;
+use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\JsonStreamerTransformerPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\MetadataAwareNameConverterPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\MutatorPass;
 use ApiPlatform\Symfony\Bundle\DependencyInjection\Compiler\SerializerMappingLoaderPass;
@@ -57,6 +58,7 @@ public function testBuild(): void
         $containerProphecy->addCompilerPass(Argument::type(AuthenticatorManagerPass::class))->willReturn($containerProphecy->reveal())->shouldBeCalled();
         $containerProphecy->addCompilerPass(Argument::type(SerializerMappingLoaderPass::class))->willReturn($containerProphecy->reveal())->shouldBeCalled();
         $containerProphecy->addCompilerPass(Argument::type(MutatorPass::class))->willReturn($containerProphecy->reveal())->shouldBeCalled();
+        $containerProphecy->addCompilerPass(Argument::type(JsonStreamerTransformerPass::class), PassConfig::TYPE_BEFORE_OPTIMIZATION, -10)->willReturn($containerProphecy->reveal())->shouldBeCalled();
 
         $bundle = new ApiPlatformBundle();
         $bundle->build($containerProphecy->reveal());