[Form] fixed validation when using the 'validation_constraint' option

src/Symfony/Component/Form/Extension/Validator/Validator/DelegatingValidator.php

@@ -18,6 +18,7 @@ use Symfony\Component\Form\Util\VirtualFormAwareIterator;
 use Symfony\Component\Form\Exception\FormException;
 use Symfony\Component\Validator\ValidatorInterface;
 use Symfony\Component\Validator\ExecutionContext;
+use Symfony\Component\Form\Util\PropertyPath;
 
 class DelegatingValidator implements FormValidatorInterface
 {
@@ -53,11 +54,29 @@ class DelegatingValidator implements FormValidatorInterface
                     $form->getAttribute('validation_constraint'),
                     self::getFormValidationGroups($form)
                 );
-            } else {
-                $violations = $this->validator->validate($form);
-            }
 
-            if ($violations) {
+                if ($violations) {
+                    foreach ($violations as $violation) {
+                        $propertyPath = new PropertyPath($violation->getPropertyPath());
+                        $template = $violation->getMessageTemplate();
+                        $parameters = $violation->getMessageParameters();
+                        $error = new FormError($template, $parameters);
+
+                        $child = $form;
+                        foreach ($propertyPath->getElements() as $element) {
+                            $children = $child->getChildren();
+                            if (!isset($children[$element])) {
+                                $form->addError($error);
+                                break;
+                            }
+
+                            $child = $children[$element];
+                        }
+
+                        $child->addError($error);
+                    }
+                }
+            } elseif ($violations = $this->validator->validate($form)) {
                 foreach ($violations as $violation) {
                     $propertyPath = $violation->getPropertyPath();
                     $template = $violation->getMessageTemplate();