New in Symfony 4.4: Improved Type Constraint

October 14, 2019 · Published by Avatar of Javier Eguiluz Javier Eguiluz
Jan Schädlich

Contributed by
Jan Schädlich
in #31351.

The Type constraint included in the Validator component validates that a given value is of a specific data type. This type can be any of the valid PHP types, any of the PHP ctype functions (e.g. alnum, alpha, digit, etc.) and also the FQCN of any class:

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// src/Entity/Author.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Author
{
    /**
     * @Assert\Type("Ramsey\Uuid\UuidInterface")
     */
    protected $id;

    /**
     * @Assert\Type("string")
     */
    protected $firstName;

    // ...
}

Starting from Symfony 4.4, the checked type can be an array of types, so you can validate that the given value type is one of several possible types. In the following example, the $accessCode property can contain only letters or only digits, but not both:

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// src/Entity/Author.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Author
{
    // ...

    /**
     * @Assert\Type(type={"alpha", "digit"})
     */
    protected $accessCode;
}
Published in #Living on the edge

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Comments

Avatar of Anatoly Skornyakov
Anatoly Skornyakov said on Oct 14, 2019
Nice! Thx!
Avatar of baubeDilane
baubeDilane said on Oct 15, 2019
Oh good! It's simple but so useful =)

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