NotBlank ======== Validates that a value is not blank - meaning not equal to a blank string, a blank array, ``false`` or ``null`` (null behavior is configurable). To check that a value is not equal to ``null``, see the :doc:`/reference/constraints/NotNull` constraint. ========== =================================================================== Applies to :ref:`property or method ` Options - `allowNull`_ - `groups`_ - `message`_ - `normalizer`_ - `payload`_ Class :class:`Symfony\\Component\\Validator\\Constraints\\NotBlank` Validator :class:`Symfony\\Component\\Validator\\Constraints\\NotBlankValidator` ========== =================================================================== Basic Usage ----------- If you wanted to ensure that the ``firstName`` property of an ``Author`` class were not blank, you could do the following: .. configuration-block:: .. code-block:: php-annotations // src/Entity/Author.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; class Author { /** * @Assert\NotBlank */ protected $firstName; } .. code-block:: yaml # config/validator/validation.yaml App\Entity\Author: properties: firstName: - NotBlank: ~ .. code-block:: xml .. code-block:: php // src/Entity/Author.php namespace App\Entity; use Symfony\Component\Validator\Constraints as Assert; use Symfony\Component\Validator\Mapping\ClassMetadata; class Author { public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('firstName', new Assert\NotBlank()); } } Options ------- allowNull ~~~~~~~~~ **type**: ``bool`` **default**: ``false`` If set to ``true``, ``null`` values are considered valid and won't trigger a constraint violation. .. include:: /reference/constraints/_groups-option.rst.inc ``message`` ~~~~~~~~~~~ **type**: ``string`` **default**: ``This value should not be blank.`` This is the message that will be shown if the value is blank. You can use the following parameters in this message: =============== ============================================================== Parameter Description =============== ============================================================== ``{{ value }}`` The current (invalid) value =============== ============================================================== .. include:: /reference/constraints/_normalizer-option.rst.inc .. include:: /reference/constraints/_payload-option.rst.inc