Issn ==== Validates that a value is a valid `International Standard Serial Number (ISSN)`_. ========== =================================================================== Applies to :ref:`property or method ` Options - `caseSensitive`_ - `groups`_ - `message`_ - `payload`_ - `requireHyphen`_ Class :class:`Symfony\\Component\\Validator\\Constraints\\Issn` Validator :class:`Symfony\\Component\\Validator\\Constraints\\IssnValidator` ========== =================================================================== Basic Usage ----------- .. configuration-block:: .. code-block:: php-annotations // src/Entity/Journal.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; class Journal { /** * @Assert\Issn */ protected $issn; } .. code-block:: yaml # config/validator/validation.yaml App\Entity\Journal: properties: issn: - Issn: ~ .. code-block:: xml .. code-block:: php // src/Entity/Journal.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; use Symfony\Component\Validator\Mapping\ClassMetadata; class Journal { public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('issn', new Assert\Issn()); } } .. include:: /reference/constraints/_empty-values-are-valid.rst.inc Options ------- caseSensitive ~~~~~~~~~~~~~ **type**: ``boolean`` default: ``false`` The validator will allow ISSN values to end with a lower case 'x' by default. When switching this to ``true``, the validator requires an upper case 'X'. .. include:: /reference/constraints/_groups-option.rst.inc message ~~~~~~~ **type**: ``string`` default: ``This value is not a valid ISSN.`` The message shown if the given value is not a valid ISSN. You can use the following parameters in this message: =============== ============================================================== Parameter Description =============== ============================================================== ``{{ value }}`` The current (invalid) value =============== ============================================================== .. include:: /reference/constraints/_payload-option.rst.inc requireHyphen ~~~~~~~~~~~~~ **type**: ``boolean`` default: ``false`` The validator will allow non hyphenated ISSN values by default. When switching this to ``true``, the validator requires a hyphenated ISSN value. .. _`International Standard Serial Number (ISSN)`: https://en.wikipedia.org/wiki/Issn