False.rst

False

Validates that a value is false. Specifically, this checks to see if the value is exactly false, exactly the integer 0, or exactly the string "0".

Also see :doc:`True <True>`.

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

Basic Usage

The False constraint can be applied to a property or a "getter" method, but is most commonly useful in the latter case. For example, suppose that you want to guarantee that some state property is not in a dynamic invalidStates array. First, you'd create a "getter" method:

protected $state;

protectd $invalidStates = array();

public function isStateInvalid()
{
    return in_array($this->state, $this->invalidStates);
}

In this case, the underlying object is only valid if the isStateInvalid method returns false:

.. configuration-block::

    .. code-block:: yaml

        # src/BlogBundle/Resources/config/validation.yml
        Acme\BlogBundle\Entity\Author
            getters:
                stateInvalid:
                    - "False":
                        message: You've entered an invalid state.

    .. code-block:: php-annotations

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

        class Author
        {
            /**
             * @Assert\False()
             */
             public function isStateInvalid($message = "You've entered an invalid state.")
             {
                // ...
             }
        }

Caution!

When using YAML, be sure to surround False with quotes ("False") or else YAML will convert this into a Boolean value.

Options

message

type: string default: This value should be false

This message is shown if the underlying data is not false.