From 70276a8c31c533d3b87d0543f08512998ae94f74 Mon Sep 17 00:00:00 2001
From: soyuka <soyuka@users.noreply.github.com>
Date: Fri, 26 Jun 2026 15:21:44 +0200
Subject: [PATCH] fix(symfony): allow null $data in PlaceholderAction

In event-listener mode a POST with input:false (and no read) never
sets the "data" request attribute, so Symfony's argument resolver
fails with "Could not resolve argument $data". Default the argument
to null, mirroring the non-listener state-machine flow.

Closes #8354
---
 src/Symfony/EventListener/DeserializeListener.php | 4 ++++
 tests/Functional/JsonLd/InputOutputDtoTest.php    | 4 ----
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/Symfony/EventListener/DeserializeListener.php b/src/Symfony/EventListener/DeserializeListener.php
index bf34cea24ca..0a00de57633 100644
--- a/src/Symfony/EventListener/DeserializeListener.php
+++ b/src/Symfony/EventListener/DeserializeListener.php
@@ -76,6 +76,10 @@ public function onKernelRequest(RequestEvent $event): void
         }
 
         if (!$operation->canDeserialize()) {
+            if (!$request->attributes->has('data')) {
+                $request->attributes->set('data', null);
+            }
+
             return;
         }
 
diff --git a/tests/Functional/JsonLd/InputOutputDtoTest.php b/tests/Functional/JsonLd/InputOutputDtoTest.php
index e52474d0f82..45c40db9b26 100644
--- a/tests/Functional/JsonLd/InputOutputDtoTest.php
+++ b/tests/Functional/JsonLd/InputOutputDtoTest.php
@@ -158,10 +158,6 @@ public function testInputOutputCycle(): void
 
     public function testCreateNoInputResource(): void
     {
-        if ($_SERVER['USE_SYMFONY_LISTENERS'] ?? false) {
-            $this->markTestSkipped('PlaceholderAction cannot resolve $data when input:false in event-listener mode.');
-        }
-
         $response = self::createClient()->request('POST', '/jsonld_no_inputs', [
             'headers' => ['Accept' => 'application/ld+json'],
         ]);