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Added a missing validator example #9837

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May 28, 2018
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Added a missing validator example #9837

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25 changes: 25 additions & 0 deletions components/validator/metadata.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -70,3 +70,28 @@ Classes
Some constraints allow to validate the entire object. For example, the
:doc:`Callback </reference/constraints/Callback>` constraint is a generic
constraint that's applied to the class itself.

Suppose that the class defines a ``validate()`` method to hold its custom
validation logic::

// ...
use Symfony\Component\Validator\Context\ExecutionContextInterface;

public function validate(ExecutionContextInterface $context)
{
// ...
}

Then, add the Validator component configuration to the class::

// ...
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;

class Author
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addConstraint(new Assert\Callback('validate'));
}
}