8000 [Validator] Add `Slug` constraint · symfony/symfony@6233382 · GitHub
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[Validator] Add Slug constraint
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‎src/Symfony/Component/Validator/CHANGELOG.md

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---
66

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* Add support for ratio checks for SVG files to the `Image` constraint
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* Add the `Slug` constraint
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910
7.2
1011
---

‎src/Symfony/Component/Validator/Constraints/Slug.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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/**
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* Validates that a value is a valid slug.
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*
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* @author Raffaele Carelle <raffaele.carelle@gmail.com>
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*/
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#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
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class Slug extends Constraint
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{
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public const NOT_SLUG_ERROR = '14e6df1e-c8ab-4395-b6ce-04b132a3765e';
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public string $message = 'This value is not a valid slug.';
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public string $regex = '/^[a-z0-9]+(?:-[a-z0-9]+)*$/';
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public function __construct(
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?array $options = null,
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?string $regex = null,
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?string $message = null,
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?array $groups = null,
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mixed $payload = null,
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) {
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parent::__construct($options, $groups, $payload);
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$this->message = $message ?? $this->message;
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$this->regex = $regex ?? $this->regex;
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}
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}

‎src/Symfony/Component/Validator/Constraints/SlugValidator.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Constraints;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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use Symfony\Component\Validator\Exception\UnexpectedTypeException;
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use Symfony\Component\Validator\Exception\UnexpectedValueException;
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/**
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* @author Raffaele Carelle <raffaele.carelle@gmail.com>
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*/
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class SlugValidator extends ConstraintValidator
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{
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public function validate(mixed $value, Constraint $constraint): void
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{
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if (!$constraint instanceof Slug) {
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throw new UnexpectedTypeException($constraint, Slug::class);
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}
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if (null === $value || '' === $value) {
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return;
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}
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if (!\is_scalar($value) && !$value instanceof \Stringable) {
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throw new UnexpectedValueException($value, 'string');
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}
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$value = (string) $value;
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if (0 === preg_match($constraint->regex, $value)) {
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$this->context->buildViolation($constraint->message)
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->setParameter('{{ value }}', $this->formatValue($value))
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->setCode(Slug::NOT_SLUG_ERROR)
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->addViolation();
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}
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}
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}

‎src/Symfony/Component/Validator/Tests/Constraints/SlugTest.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Tests\Constraints;
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use PHPUnit\Framework\TestCase;
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use Symfony\Component\Validator\Constraints\Slug;
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use Symfony\Component\Validator\Mapping\ClassMetadata;
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use Symfony\Component\Validator\Mapping\Loader\AttributeLoader;
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class SlugTest extends TestCase
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{
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public function testAttributes()
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{
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$metadata = new ClassMetadata(SlugDummy::class);
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$loader = new AttributeLoader();
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self::assertTrue($loader->loadClassMetadata($metadata));
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[$bConstraint] = $metadata->properties['b']->getConstraints();
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self::assertSame('myMessage', $bConstraint->message);
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self::assertSame(['Default', 'SlugDummy'], $bConstraint->groups);
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[$cConstraint] = $metadata->properties['c']->getConstraints();
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self::assertSame(['my_group'], $cConstraint->groups);
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self::assertSame('some attached data', $cConstraint->payload);
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}
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}
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class SlugDummy
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{
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#[Slug]
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private $a;
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#[Slug(message: 'myMessage')]
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private $b;
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#[Slug(groups: ['my_group'], payload: 'some attached data')]
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private $c;
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}

‎src/Symfony/Component/Validator/Tests/Constraints/SlugValidatorTest.php

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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Validator\Tests\Constraints;
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use Symfony\Component\Validator\Constraints\Slug;
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use Symfony\Component\Validator\Constraints\SlugValidator;
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use Symfony\Component\Validator\Exception\UnexpectedValueException;
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use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
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class SlugValidatorTest extends ConstraintValidatorTestCase
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{
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protected function createValidator(): SlugValidator
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{
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return new SlugValidator();
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}
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public function testNullIsValid()
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{
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$this->validator->validate(null, new Slug());
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$this->assertNoViolation();
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}
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public function testEmptyStringIsValid()
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{
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$this->validator->validate('', new Slug());
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$this->assertNoViolation();
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}
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public function testExpectsStringCompatibleType()
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{
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$this->expectException(UnexpectedValueException::class);
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$this->validator->validate(new \stdClass(), new Slug());
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}
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/**
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* @testWith ["test-slug"]
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* ["slug-123-test"]
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* ["slug"]
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*/
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public function testValidSlugs($slug)
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{
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$this->validator->validate($slug, new Slug());
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$this->assertNoViolation();
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}
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/**
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* @testWith ["NotASlug"]
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* ["Not a slug"]
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* ["not-á-slug"]
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* ["not-@-slug"]
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*/
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public function testInvalidSlugs($slug)
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{
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$constraint = new Slug([
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'message' => 'myMessage',
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]);
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$this->validator->validate($slug, $constraint);
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$this->buildViolation('myMessage')
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->setParameter('{{ value }}', '"'.$slug.'"')
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->setCode(Slug::NOT_SLUG_ERROR)
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->assertRaised();
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}
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/**
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* @testWith ["test-slug", true]
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* ["slug-123-test", true]
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*/
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public function testCustomRegexInvalidSlugs($slug)
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{
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$constraint = new Slug(regex: '/^[a-z0-9]+$/i');
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$this->validator->validate($slug, $constraint);
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$this->buildViolation($constraint->message)
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->setParameter('{{ value }}', '"'.$slug.'"')
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->setCode(Slug::NOT_SLUG_ERROR)
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->assertRaised();
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}
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/**
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* @testWith ["slug"]
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* @testWith ["test1234"]
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*/
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public function testCustomRegexValidSlugs($slug)
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{
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$constraint = new Slug(regex: '/^[a-z0-9]+$/i');
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$this->validator->validate($slug, $constraint);
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$this->assertNoViolation();
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}
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}

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