[Form] Fixed handling groups sequence validation

src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php

@@ -24,6 +24,8 @@
  */
 class FormValidator extends ConstraintValidator
 {
+    private $resolvedGroups;
+
     /**
      * {@inheritdoc}
      */
@@ -44,42 +46,68 @@ public function validate($form, Constraint $formConstraint)
 
         if ($form->isSubmitted() && $form->isSynchronized()) {
             // Validate the form data only if transformation succeeded
-            $groups = self::getValidationGroups($form);
+            $groups = $this->getValidationGroups($form);
 
             if (!$groups) {
                 return;
             }
 
             $data = $form->getData();
-
             // Validate the data against its own constraints
-            if ($form->isRoot() && (\is_object($data) || \is_array($data))) {
-                if (($groups && \is_array($groups)) || ($groups instanceof GroupSequence && $groups->groups)) {
-                    $validator->atPath('data')->validate($form->getData(), null, $groups);
-                }
-            }
+            $validateDataGraph = $form->isRoot()
+                && (\is_object($data) || \is_array($data))
+                && (($groups && \is_array($groups)) || ($groups instanceof GroupSequence && $groups->groups))
+            ;
 
-            // Validate the data against the constraints defined
-            // in the form
+            // Validate the data against the constraints defined in the form
+            /** @var Constraint[] $constraints */
             $constraints = $config->getOption('constraints', []);
 
             if ($groups instanceof GroupSequence) {
-                $validator->atPath('data')->validate($form->getData(), $constraints, $groups);
-                // Otherwise validate a constraint only once for the first
-                // matching group
-                foreach ($groups as $group) {
-                    if (\in_array($group, $formConstraint->groups)) {
-                        $validator->atPath('data')->validate($form->getData(), $formConstraint, $group);
-                        if (\count($this->context->getViolations()) > 0) {
-                            break;
+                // Validate the data, the form AND nested fields in sequence
+                $violationsCount = $this->context->getViolations()->count();
+                $fieldPropertyPath = \is_object($data) ? 'children[%s]' : 'children%s';
+                $hasChildren = $form->count() > 0;
+                $this->resolvedGroups = $hasChildren ? new \SplObjectStorage() : null;
+
+                foreach ($groups->groups as $group) {
+                    if ($validateDataGraph) {
+                        $validator->atPath('data')->validate($data, null, $group);
+                    }
+
+                    if ($groupedConstraints = self::getConstraintsInGroups($constraints, $group)) {
+                        $validator->atPath('data')->validate($data, $groupedConstraints, $group);
+                    }
+
+                    foreach ($form->all() as $field) {
+                        if ($field->isSubmitted()) {
+                            // remember to validate this field is one group only
+                            // otherwise resolving the groups would reuse the same
+                            // sequence recursively, thus some fields could fail
+                            // in different steps without breaking early enough
+                            $this->resolvedGroups[$field] = (array) $group;
+                            $validator->atPath(sprintf($fieldPropertyPath, $field->getPropertyPath()))->validate($field, $formConstraint);
                         }
                     }
+
+                    if ($violationsCount < $this->context->getViolations()->count()) {
+                        break;
+                    }
+                }
+
+                if ($hasChildren) {
+                    // destroy storage at the end of the sequence to avoid memory leaks
+                    $this->resolvedGroups = null;
                 }
             } else {
+                if ($validateDataGraph) {
+                    $validator->atPath('data')->validate($data, null, $groups);
+                }
+
                 foreach ($constraints as $constraint) {
                     // For the "Valid" constraint, validate the data in all groups
                     if ($constraint instanceof Valid) {
-                        $validator->atPath('data')->validate($form->getData(), $constraint, $groups);
+                        $validator->atPath('data')->validate($data, $constraint, $groups);
 
                         continue;
                     }
@@ -88,7 +116,7 @@ public function validate($form, Constraint $formConstraint)
                     // matching group
                     foreach ($groups as $group) {
                         if (\in_array($group, $constraint->groups)) {
-                            $validator->atPath('data')->validate($form->getData(), $constraint, $group);
+                            $validator->atPath('data')->validate($data, $constraint, $group);
 
                             // Prevent duplicate validation
                             if (!$constraint instanceof Composite) {
@@ -147,7 +175,7 @@ public function validate($form, Constraint $formConstraint)
      *
      * @return string|GroupSequence|(string|GroupSequence)[] The validation groups
      */
-    private static function getValidationGroups(FormInterface $form)
+    private function getValidationGroups(FormInterface $form)
     {
         // Determine the clicked button of the complete form tree
         $clickedButton = null;
@@ -171,6 +199,10 @@ private static function getValidationGroups(FormInterface $form)
                 return self::resolveValidationGroups($groups, $form);
             }
 
+            if (isset($this->resolvedGroups[$form])) {
+                return $this->resolvedGroups[$form];
+            }
+
             $form = $form->getParent();
         } while (null !== $form);
 
@@ -197,4 +229,11 @@ private static function resolveValidationGroups($groups, FormInterface $form)
 
         return (array) $groups;
     }
+
+    private static function getConstraintsInGroups($constraints, $group)
+    {
+        return array_filter($constraints, static function (Constraint $constraint) use ($group) {
+            return \in_array($group, $constraint->groups, true);
+        });
+    }
 }

src/Symfony/Component/Form/Resources/config/validation.xml

@@ -7,7 +7,7 @@
   <class name="Symfony\Component\Form\Form">
     <constraint name="Symfony\Component\Form\Extension\Validator\Constraints\Form" />
     <property name="children">
-        <constraint name="Valid" />
+      <constraint name="Valid" />
     </property>
   </class>
 </constraint-mapping>

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

@@ -401,8 +401,8 @@ public function testHandleGroupSequenceValidationGroups()
         $form = $this->getCompoundForm($object, $options);
         $form->submit([]);
 
-        $this->expectValidateAt(0, 'data', $object, new GroupSequence(['group1', 'group2']));
-        $this->expectValidateAt(1, 'data', $object, new GroupSequence(['group1', 'group2']));
+        $this->expectValidateAt(0, 'data', $object, 'group1');
+        $this->expectValidateAt(1, 'data', $object, 'group2');
 
         $this->validator->validate($form, new Form());
 
@@ -756,6 +756,39 @@ public function testCompositeConstraintValidatedInEachGroup()
         $this->assertSame('data[field2]', $context->getViolations()[1]->getPropertyPath());
     }
 
+    public function testCompositeConstraintValidatedInSequence()
+    {
+        $form = $this->getCompoundForm([], [
+            'constraints' => [
+                new Collection([
+                    'field1' => new NotBlank([
+                        'groups' => ['field1'],
+                    ]),
+                    'field2' => new NotBlank([
+                        'groups' => ['field2'],
+                    ]),
+                ]),
+            ],
+            'validation_groups' => new GroupSequence(['field1', 'field2']),
+        ])
+            ->add($this->getForm('field1'))
+            ->add($this->getForm('field2'))
+        ;
+
+        $form->submit([
+            'field1' => '',
+            'field2' => '',
+        ]);
+
+        $context = new ExecutionContext(Validation::createValidator(), $form, new IdentityTranslator());
+        $this->validator->initialize($context);
+        $this->validator->validate($form, new Form());
+
+        $this->assertCount(1, $context->getViolations());
+        $this->assertSame('This value should not be blank.', $context->getViolations()[0]->getMessage());
+        $this->assertSame('data[field1]', $context->getViolations()[0]->getPropertyPath());
+    }
+
     protected function createValidator()
     {
         return new FormValidator();
@@ -784,7 +817,7 @@ private function getForm($name = 'name', $dataClass = null, array $options = [])
 
     private function getCompoundForm($data, array $options = [])
     {
-        return $this->getBuilder('name', \get_class($data), $options)
+        return $this->getBuilder('name', \is_object($data) ? \get_class($data) : null, $options)
             ->setData($data)
             ->setCompound(true)
             ->setDataMapper(new PropertyPathMapper())

src/Symfony/Component/Form/Tests/Extension/Validator/Type/FormTypeValidatorExtensionTest.php

@@ -12,15 +12,19 @@
 namespace Symfony\Component\Form\Tests\Extension\Validator\Type;
 
 use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
+use Symfony\Component\Form\Form;
 use Symfony\Component\Form\Forms;
 use Symfony\Component\Form\Test\Traits\ValidatorExtensionTrait;
 use Symfony\Component\Form\Tests\Extension\Core\Type\FormTypeTest;
 use Symfony\Component\Form\Tests\Extension\Core\Type\TextTypeTest;
-use Symfony\Component\Validator\Constraints\Email;
+use Symfony\Component\Form\Tests\Fixtures\Author;
 use Symfony\Component\Validator\Constraints\GroupSequence;
 use Symfony\Component\Validator\Constraints\Length;
+use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\Valid;
 use Symfony\Component\Validator\ConstraintViolationList;
+use Symfony\Component\Validator\Mapping\ClassMetadata;
+use Symfony\Component\Validator\Mapping\Factory\MetadataFactoryInterface;
 use Symfony\Component\Validator\Validation;
 
 class FormTypeValidatorExtensionTest extends BaseValidatorExtensionTest
@@ -64,14 +68,69 @@ public function testGroupSequenceWithConstraintsOption()
             ->add('field', TextTypeTest::TESTED_TYPE, [
                 'constraints' => [
                     new Length(['min' => 10, 'groups' => ['First']]),
-                    new Email(['groups' => ['Second']]),
+                    new NotBlank(['groups' => ['Second']]),
                 ],
             ])
         ;
 
         $form->submit(['field' => 'wrong']);
 
-        $this->assertCount(1, $form->getErrors(true));
+        $errors = $form->getErrors(true);
+
+        $this->assertCount(1, $errors);
+        $this->assertInstanceOf(Length::class, $errors[0]->getCause()->getConstraint());
+    }
+
+    public function testManyFieldsGroupSequenceWithConstraintsOption()
+    {
+        $formMetadata = new ClassMetadata(Form::class);
+        $authorMetadata = (new ClassMetadata(Author::class))
+            ->addPropertyConstraint('firstName', new NotBlank(['groups' => 'Second']))
+        ;
+        $metadataFactory = $this->createMock(MetadataFactoryInterface::class);
+        $metadataFactory->expects($this->any())
+            ->method('getMetadataFor')
+            ->willReturnCallback(static function ($classOrObject) use ($formMetadata, $authorMetadata) {
+                if (Author::class === $classOrObject || $classOrObject instanceof Author) {
+                    return $authorMetadata;
+                }
+
+                if (Form::class === $classOrObject || $classOrObject instanceof Form) {
+                    return $formMetadata;
+                }
+
+                return new ClassMetadata(\is_string($classOrObject) ? $classOrObject : \get_class($classOrObject));
+            })
+        ;
+
+        $validator = Validation::createValidatorBuilder()
+            ->setMetadataFactory($metadataFactory)
+            ->getValidator()
+        ;
+        $form = Forms::createFormFactoryBuilder()
+            ->addExtension(new ValidatorExtension($validator))
+            ->getFormFactory()
+            ->create(FormTypeTest::TESTED_TYPE, new Author(), (['validation_groups' => new GroupSequence(['First', 'Second'])]))
+            ->add('firstName', TextTypeTest::TESTED_TYPE)
+            ->add('lastName', TextTypeTest::TESTED_TYPE, [
+                'constraints' => [
+                    new Length(['min' => 10, 'groups' => ['First']]),
+                ],
+            ])
+            ->add('australian', TextTypeTest::TESTED_TYPE, [
+                'constraints' => [
+                    new NotBlank(['groups' => ['Second']]),
+                ],
+            ])
+        ;
+
+        $form->submit(['firstName' => '', 'lastName' => 'wrong_1', 'australian' => '']);
+
+        $errors = $form->getErrors(true);
+
+        $this->assertCount(1, $errors);
+        $this->assertInstanceOf(Length::class, $errors[0]->getCause()->getConstraint());
+        $this->assertSame('children[lastName].data', $errors[0]->getCause()->getPropertyPath());
     }
 
     protected function createForm(array $options = [])

src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php

@@ -13,13 +13,17 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\FormType;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\Extension\Validator\Constraints\Form as FormConstraint;
 use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
 use Symfony\Component\Form\Extension\Validator\ValidatorTypeGuesser;
 use Symfony\Component\Form\Form;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormFactoryBuilder;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\GroupSequence;
+use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Mapping\CascadingStrategy;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
@@ -49,6 +53,8 @@ public function test2Dot5ValidationApi()
         $this->assertCount(1, $metadata->getConstraints());
         $this->assertInstanceOf(FormConstraint::class, $metadata->getConstraints()[0]);
 
+        $this->assertSame(CascadingStrategy::NONE, $metadata->cascadingStrategy);
+        $this->assertSame(TraversalStrategy::IMPLICIT, $metadata->traversalStrategy);
         $this->assertSame(CascadingStrategy::CASCADE, $metadata->getPropertyMetadata('children')[0]->cascadingStrategy);
         $this->assertSame(TraversalStrategy::IMPLICIT, $metadata->getPropertyMetadata('children')[0]->traversalStrategy);
     }
@@ -86,7 +92,53 @@ public function testFieldConstraintsInvalidateFormIfFieldIsSubmitted()
         $this->assertFalse($form->get('baz')->isValid());
     }
 
-    private function createForm($type)
+    public function testFieldsValidateInSequence()
+    {
+        $form = $this->createForm(FormType::class, null, [
+            'validation_groups' => new GroupSequence(['group1', 'group2']),
+        ])
+            ->add('foo', TextType::class, [
+                'constraints' => [new Length(['min' => 10, 'groups' => ['group1']])],
+            ])
+            ->add('bar', TextType::class, [
+                'constraints' => [new NotBlank(['groups' => ['group2']])],
+            ])
+        ;
+
+        $form->submit(['foo' => 'invalid', 'bar' => null]);
+
+        $errors = $form->getErrors(true);
+
+        $this->assertCount(1, $errors);
+        $this->assertInstanceOf(Length::class, $errors[0]->getCause()->getConstraint());
+    }
+
+    public function testFieldsValidateInSequenceWithNestedGroupsArray()
+    {
+        $form = $this->createForm(FormType::class, null, [
+            'validation_groups' => new GroupSequence([['group1', 'group2'], 'group3']),
+        ])
+            ->add('foo', TextType::class, [
+                'constraints' => [new Length(['min' => 10, 'groups' => ['group1']])],
+            ])
+            ->add('bar', TextType::class, [
+                'constraints' => [new Length(['min' => 10, 'groups' => ['group2']])],
+            ])
+            ->add('baz', TextType::class, [
+                'constraints' => [new NotBlank(['groups' => ['group3']])],
+            ])
+        ;
+
+        $form->submit(['foo' => 'invalid', 'bar' => 'invalid', 'baz' => null]);
+
+        $errors = $form->getErrors(true);
+
+        $this->assertCount(2, $errors);
+        $this->assertInstanceOf(Length::class, $errors[0]->getCause()->getConstraint());
+        $this->assertInstanceOf(Length::class, $errors[1]->getCause()->getConstraint());
+    }
+
+    private function createForm($type, $data = null, array $options = [])
     {
         $validator = Validation::createValidatorBuilder()
             ->setMetadataFactory(new LazyLoadingMetadataFactory(new StaticMethodLoader()))
@@ -95,7 +147,7 @@ private function createForm($type)
         $formFactoryBuilder->addExtension(new ValidatorExtension($validator));
         $formFactory = $formFactoryBuilder->getFormFactory();
 
-        return $formFactory->create($type);
+        return $formFactory->create($type, $data, $options);
     }
 }