Adding a tip for validation in forms without class #7754
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When a form is mapped to an array instead of an object (i.e. a search form), every object in the array is validated with Symfony\Component\Validator\Constraints\Valid constraint.
For example a search form mapped to an array including a field of type Symfony\Bridge\Doctrine\Form\Type\EntityType will validate the choosen entity itself, resulting in an invalid form if the (already persisted) entity is, for some reasons, invalid.
References: https://github.com/symfony/symfony/blob/2.8/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php#L171:L186
I'm wondering if this behavior is a bug, while the validation of objects has this approach
"If an object is passed without explicit constraints, validate that object against the constraints defined for the object's class [eventually none]"
https://github.com/symfony/symfony/blob/2.8/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php#L154:L169