[Form] Disabled view data validation if "data_class" is set to null

src/Symfony/Component/Form/Form.php

@@ -356,21 +356,11 @@ class Form implements \IteratorAggregate, FormInterface
         if (!FormUtil::isEmpty($viewData)) {
             $dataClass = $this->config->getDataClass();
 
-            $actualType = is_object($viewData) ? 'an instance of class '.get_class($viewData) : 'a(n) '.gettype($viewData);
-
-            if (null === $dataClass && is_object($viewData) && !$viewData instanceof \ArrayAccess) {
-                $expectedType = 'scalar, array or an instance of \ArrayAccess';
-
-                throw new LogicException(
-                    'The form\'s view data is expected to be of type '.$expectedType.', '.
-                    'but is '.$actualType.'. You '.
-                    'can avoid this error by setting the "data_class" option to '.
-                    '"'.get_class($viewData).'" or by adding a view transformer '.
-                    'that transforms '.$actualType.' to '.$expectedType.'.'
-                );
-            }
-
             if (null !== $dataClass && !$viewData instanceof $dataClass) {
+                $actualType = is_object($viewData)
+                    ? 'an instance of class '.get_class($viewData)
+                    : 'a(n) '.gettype($viewData);
+
                 throw new LogicException(
                     'The form\'s view data is expected to be an instance of class '.
                     $dataClass.', but is '.$actualType.'. You can avoid this error '.

src/Symfony/Component/Form/Tests/SimpleFormTest.php

@@ -840,19 +840,19 @@ class SimpleFormTest extends AbstractFormTest
         $this->assertEquals(new PropertyPath('[name]'), $form->getPropertyPath());
     }
 
-    /**
+    public function testViewDataMayBeObjectIfDataClassIsNull()
-     * @expectedException \Symfony\Component\Form\Exception\LogicException
-     */
-    public function testViewDataMustNotBeObjectIfDataClassIsNull()
     {
+        $object = new \stdClass();
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
         $config->addViewTransformer(new FixedDataTransformer(array(
             '' => '',
-            'foo' => new \stdClass(),
+            'foo' => $object,
         )));
         $form = new Form($config);
 
         $form->setData('foo');
+
+        $this->assertSame($object, $form->getViewData());
     }
 
     public function testViewDataMayBeArrayAccessIfDataClassIsNull()