[Form] Fixed: Data mappers always receive forms indexed by their names

Author: webmozart

Form.php

@@ -895,7 +895,7 @@ public function add($child, $type = null, array $options = array())
         $child->setParent($this);
 
         if (!$this->lockSetData && $this->defaultDataSet && !$this->config->getInheritData()) {
-            $iterator = new InheritDataAwareIterator(new \ArrayIterator(array($child)));
+            $iterator = new InheritDataAwareIterator(new \ArrayIterator(array($child->getName() => $child)));
             $iterator = new \RecursiveIteratorIterator($iterator);
             $this->config->getDataMapper()->mapDataToForms($viewData, $iterator);
         }

Tests/CompoundFormTest.php

@@ -352,7 +352,7 @@ public function testAddMapsViewDataToFormIfInitialized()
             ->with('bar', $this->isInstanceOf('\RecursiveIteratorIterator'))
             ->will($this->returnCallback(function ($data, \RecursiveIteratorIterator $iterator) use ($child, $test) {
                 $test->assertInstanceOf('Symfony\Component\Form\Util\InheritDataAwareIterator', $iterator->getInnerIterator());
-                $test->assertSame(array($child), iterator_to_array($iterator));
+                $test->assertSame(array($child->getName() => $child), iterator_to_array($iterator));
             }));
 
         $form->initialize();