bug #29307 [Form] Filter arrays out of scalar form types (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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[Form] Filter arrays out of scalar form types

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/symfony/symfony/issues/4102
| License       | MIT
| Doc PR        | -

Replaces fix https://github.com/symfony/symfony/pull/20935

Commits
-------

000e4aab5e [Form] Filter arrays out of scalar form types

src/Symfony/Component/Form/Form.php

@@ -532,11 +532,12 @@ class Form implements \IteratorAggregate, FormInterface
             $submittedData = null;
         } elseif (is_scalar($submittedData)) {
             $submittedData = (string) $submittedData;
-        } elseif ($this->config->getOption('allow_file_upload')) {
-            // no-op
-        } elseif ($this->config->getRequestHandler()->isFileUpload($submittedData)) {
+        } elseif (!$this->config->getOption('allow_file_upload') && $this->config->getRequestHandler()->isFileUpload($submittedData)) {
             $submittedData = null;
             $this->transformationFailure = new TransformationFailedException('Submitted data was expected to be text or number, file upload given.');
+        } elseif (\is_array($submittedData) && !$this->config->getCompound() && !$this->config->hasOption('multiple')) {
+            $submittedData = null;
+            $this->transformationFailure = new TransformationFailedException('Submitted data was expected to be text or number, array given.');
         }
 
         $dispatcher = $this->config->getEventDispatcher();

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

@@ -1036,6 +1036,22 @@ class CompoundFormTest extends AbstractFormTest
         $this->assertFalse($submit->isSubmitted());
     }
 
+    public function testArrayTransformationFailureOnSubmit()
+    {
+        $this->form->add($this->getBuilder('foo')->setCompound(false)->getForm());
+        $this->form->add($this->getBuilder('bar', null, null, array('multiple' => false))->setCompound(false)->getForm());
+
+        $this->form->submit(array(
+            'foo' => array('foo'),
+            'bar' => array('bar'),
+        ));
+
+        $this->assertNull($this->form->get('foo')->getData());
+        $this->assertSame('Submitted data was expected to be text or number, array given.', $this->form->get('foo')->getTransformationFailure()->getMessage());
+
+        $this->assertSame(array('bar'), $this->form->get('bar')->getData());
+    }
+
     public function testFileUpload()
     {
         $reqHandler = new HttpFoundationRequestHandler();

src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php

@@ -83,14 +83,6 @@ class UrlTypeTest extends TextTypeTest
         ));
     }
 
-    public function testSubmitWithNonStringDataDoesNotBreakTheFixUrlProtocolListener()
-    {
-        $form = $this->factory->create(static::TESTED_TYPE);
-        $form->submit(array('domain.com', 'www.domain.com'));
-
-        $this->assertSame(array('domain.com', 'www.domain.com'), $form->getData());
-    }
-
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'empty', $expectedData = 'http://empty')
     {
         $form = $this->factory->create(static::TESTED_TYPE, null, array(

src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php

@@ -220,7 +220,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->getForm();
 
         // Launch transformer
-        $form->submit(array());
+        $form->submit('foo');
 
         $this->expectNoValidate();