Blank.rst

Blank

Validates that a value is blank, defined as equal to a blank string or equal to null. To force that a value strictly be equal to null, see the :doc:`/reference/constraints/Null` constraint. To force that a value is not blank, see :doc:`/reference/constraints/NotBlank`.

Applies to	:ref:`property or method<validation-property-target>`
Options	message
Class	:class:`Symfony\\Component\\Validator\\Constraints\\Blank`
Validator	:class:`Symfony\\Component\\Validator\\Constraints\\BlankValidator`

Basic Usage

If, for some reason, you wanted to ensure that the firstName property of an Author class were blank, you could do the following:

.. configuration-block::

    .. code-block:: yaml

        properties:
            firstName:
                - Blank: ~

    .. code-block:: php-annotations

        // src/Acme/BlogBundle/Entity/Author.php
        use Symfony\Component\Validator\Constraints as Assert;

        class Author
        {
            /**
             * @Assert\Blank()
             */
            protected $firstName;
        }

Options

message

type: string default: This value should be blank

This is the message that will be shown if the value is not blank.