UUID

UUID

Validates that a value is a valid Universally unique identifier (UUID) per RFC 4122. By default, this will validate the format according to the RFC’s guidelines, but this can be relaxed to accept non-standard UUIDs that other systems (like PostgreSQL) accept. UUID versions can also be restricted using a list of allowed versions.

Basic Usage

• Annotations

  // src/Entity/File.php
  namespace App\Entity;
  use Symfony\Component\Validator\Constraints as Assert;
  class File
  {
      /**
       * @Assert\Uuid
       */
      protected $identifier;
  }

• YAML

  # config/validator/validation.yaml
  App\Entity\File:
      properties:
          identifier:
              - Uuid: ~

• XML

  <!-- config/validator/validation.xml -->
  <?xml version="1.0" encoding="UTF-8" ?>
  <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
      <class name="App\Entity\File">
          <property name="identifier">
              <constraint name="Uuid"/>
          </property>
      </class>
  </constraint-mapping>

• PHP

  // src/Entity/File.php
  namespace App\Entity;
  use Symfony\Component\Validator\Constraints as Assert;
  use Symfony\Component\Validator\Mapping\ClassMetadata;
  class File
  {
      public static function loadValidatorMetadata(ClassMetadata $metadata)
      {
          $metadata->addPropertyConstraint('identifier', new Assert\Uuid());
      }
  }

Note

As with most of the other constraints, null and empty strings are considered valid values. This is to allow them to be optional values. If the value is mandatory, a common solution is to combine this constraint with NotBlank.

Options

groups

type: array | string

It defines the validation group or groups this constraint belongs to. Read more about validation groups.

message

type: string default: This is not a valid UUID.

This message is shown if the string is not a valid UUID.

You can use the following parameters in this message:

normalizer

type: a PHP callable default: null

This option allows to define the PHP callable applied to the given value before checking if it is valid.

For example, you may want to pass the 'trim' string to apply the [trim](https://www.php.net/manual/en/function.trim.php "trim") PHP function in order to ignore leading and trailing whitespace during validation.

payload

type: mixed default: null

This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to you.

For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.

strict

type: boolean default: true

If this option is set to true the constraint will check if the UUID is formatted per the RFC’s input format rules: 216fff40-98d9-11e3-a5e2-0800200c9a66. Setting this to false will allow alternate input formats like:

• 216f-ff40-98d9-11e3-a5e2-0800-200c-9a66
• {216fff40-98d9-11e3-a5e2-0800200c9a66}
• 216fff4098d911e3a5e20800200c9a66

versions

type: int[] default: [1,2,3,4,5]

This option can be used to only allow specific UUID versions. Valid versions are 1 - 5. The following PHP constants can also be used:

• Uuid::V1_MAC
• Uuid::V2_DCE
• Uuid::V3_MD5
• Uuid::V4_RANDOM
• Uuid::V5_SHA1

All five versions are allowed by default.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.