From 31d48ab91f2182ebd65b6e02c32b2b931aea32f3 Mon Sep 17 00:00:00 2001
From: "Nek (Maxime Veber)" <nek.dev@gmail.com>
Date: Fri, 15 Aug 2014 14:15:04 +0200
Subject: [PATCH] Fixed #11675 ValueToDuplicatesTransformer accept "0" value

Fixed wrong return null syntax

Added transformation to null on empty arrays

Removed useless statement in condition and switched to yoda condition
---
 .../ValueToDuplicatesTransformer.php          |  2 +-
 .../ValueToDuplicatesTransformerTest.php      | 23 +++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
index 618fc6b4a4..ffc9915fa4 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
@@ -64,7 +64,7 @@ class ValueToDuplicatesTransformer implements DataTransformerInterface
         $emptyKeys = array();
 
         foreach ($this->keys as $key) {
-            if (!empty($array[$key])) {
+            if (isset($array[$key]) && '' !== $array[$key] && false !== $array[$key] && array() !== $array[$key]) {
                 if ($array[$key] !== $result) {
                     throw new TransformationFailedException(
                         'All values in the array should be the same'
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
index 2c5298da50..a8a088a95a 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
@@ -82,6 +82,29 @@ class ValueToDuplicatesTransformerTest extends \PHPUnit_Framework_TestCase
         $this->assertNull($this->transformer->reverseTransform($input));
     }
 
+    public function testReverseTransformEmptyArray()
+    {
+        $input = array(
+            'a' => array(),
+            'b' => array(),
+            'c' => array(),
+        );
+
+        $this->assertNull($this->transformer->reverseTransform($input));
+    }
+
+
+    public function testReverseTransformZeroString()
+    {
+        $input = array(
+            'a' => '0',
+            'b' => '0',
+            'c' => '0'
+        );
+
+        $this->assertSame('0', $this->transformer->reverseTransform($input));
+    }
+
     /**
      * @expectedException \Symfony\Component\Form\Exception\TransformationFailedException
      */