Actualización

vendor/symfony/doctrine-bridge/Validator/DoctrineInitializer.php

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+<?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\Bridge\Doctrine\Validator;
+
+use Doctrine\Common\Persistence\ManagerRegistry;
+use Symfony\Component\Validator\ObjectInitializerInterface;
+
+/**
+ * Automatically loads proxy object before validation.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class DoctrineInitializer implements ObjectInitializerInterface
+{
+    protected $registry;
+
+    public function __construct(ManagerRegistry $registry)
+    {
+        $this->registry = $registry;
+    }
+
+    public function initialize($object)
+    {
+        $manager = $this->registry->getManagerForClass(\get_class($object));
+        if (null !== $manager) {
+            $manager->initializeObject($object);
+        }
+    }
+}