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Guide

Delete operation with validation

validation expert

Let’s add a custom Constraint.

// src/App/Validator.php
namespace App\Validator;
use Symfony\Component\Validator\Constraint;
#[\Attribute]
class AssertCanDelete extends Constraint
{
    public string $message = 'For whatever reason we denied removal of this data.';
    public string $mode = 'strict';
    public function getTargets(): string
    {
        return self::CLASS_CONSTRAINT;
    }
}

And a custom validator following Symfony’s naming conventions.

// src/App/Validator.php
namespace App\Validator;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
class AssertCanDeleteValidator extends ConstraintValidator
{
    public function validate(mixed $value, Constraint $constraint): void
    {
        $this->context->buildViolation($constraint->message)->addViolation();
    }
}

// src/App/Entity.php
namespace App\Entity;
use ApiPlatform\Metadata\Delete;
use ApiPlatform\Validator\Exception\ValidationException;
use App\Validator\AssertCanDelete;
use Doctrine\ORM\Mapping as ORM;
#[ORM\Entity]
#[Delete(

By default, validation is not triggered on a DELETE operation, let’s activate it.

    validate: true,

Just as with serialization we can add validation groups.

    validationContext: ['groups' => ['deleteValidation']],
    exceptionToStatus: [ValidationException::class => 403]
)]

Here we use the previously created constraint on the class directly.

#[AssertCanDelete(groups: ['deleteValidation'])]
class Book
{
    #[ORM\Id, ORM\Column, ORM\GeneratedValue]
    private ?int $id = null;
    #[ORM\Column]
    public string $title = '';
    public function getId()
    {
        return $this->id;
    }
}

// src/App/Playground.php
namespace App\Playground;
use Symfony\Component\HttpFoundation\Request;
function request(): Request
{
    return Request::create(uri: '/books/1', method: 'DELETE', server: ['CONTENT_TYPE' => 'application/ld+json']);
}

// src/App/Fixtures.php
namespace App\Fixtures;
use App\Entity\Book;
use Doctrine\Bundle\FixturesBundle\Fixture;
use Doctrine\Persistence\ObjectManager;
use function Zenstruck\Foundry\anonymous;
use function Zenstruck\Foundry\faker;
use function Zenstruck\Foundry\repository;
final class BookFixtures extends Fixture
{
    public function load(ObjectManager $manager): void
    {
        $bookFactory = anonymous(Book::class);
        if (repository(Book::class)->count()) {
            return;
        }
        $bookFactory->many(10)->create(
            fn () => [
                'title' => faker()->name(),
            ]
        );
    }
}

// src/DoctrineMigrations.php
namespace DoctrineMigrations;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\Migrations\AbstractMigration;
final class Migration extends AbstractMigration
{
    public function up(Schema $schema): void
    {
        $this->addSql('CREATE TABLE book (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, title VARCHAR(255) NOT NULL)');
    }
}

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