gistfile1.diff

diff --git a/src/Symfony/Component/Form/FieldFactory/ValidatorFieldFactoryGuesser.php b/src/Symfony/Component/Form/FieldFactory/ValidatorFieldFactoryGuesser.php
index 8af07d0..b4964cf 100644
--- a/src/Symfony/Component/Form/FieldFactory/ValidatorFieldFactoryGuesser.php
+++ b/src/Symfony/Component/Form/FieldFactory/ValidatorFieldFactoryGuesser.php
@@ -81,14 +81,17 @@ class ValidatorFieldFactoryGuesser implements FieldFactoryGuesserInterface
     {
         $guesses = array();
         $classMetadata = $this->metadataFactory->getClassMetadata($class);
-        $memberMetadatas = $classMetadata->getMemberMetadatas($property);
 
-        foreach ($memberMetadatas as $memberMetadata) {
-            $constraints = $memberMetadata->getConstraints();
+        if ($classMetadata->hasMemberMetadatas($property)) {
+            $memberMetadatas = $classMetadata->getMemberMetadatas($property);
 
-            foreach ($constraints as $constraint) {
-                if ($guess = $guessForConstraint($constraint)) {
-                    $guesses[] = $guess;
+            foreach ($memberMetadatas as $memberMetadata) {
+                $constraints = $memberMetadata->getConstraints();
+
+                foreach ($constraints as $constraint) {
+                    if ($guess = $guessForConstraint($constraint)) {
+                        $guesses[] = $guess;
+                    }
                 }
             }
         }
diff --git a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
index f9d83ff..d679f52 100644
--- a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
@@ -208,6 +208,18 @@ class ClassMetadata extends ElementMetadata
     }
 
     /**
+     * return true if metadatas of members is present for the given property
+     *
+     * @param string $property The name of the property
+     * @return boolean 
+     */
+    public function hasMemberMetadatas($property)
+    {
+
+        return array_key_exists($property, $this->members);
+    }
+
+    /**
      * Returns all metadatas of members describing the given property
      *
      * @param string $property The name of the property