.. versionadded:: 2.3
The ``IdenticalTo`` constraint was introduced in Symfony 2.3.
Validates that a value is identical to another value, defined in the options. To force that a value is not identical, see :doc:`/reference/constraints/NotIdenticalTo`.
Caution!
This constraint compares using ===, so 3 and "3" are not
considered equal. Use :doc:`/reference/constraints/EqualTo` to compare
with ==.
If you want to ensure that the age of a Person class is equal to
20 and an integer, you could do the following:
.. configuration-block::
.. code-block:: yaml
# src/SocialBundle/Resources/config/validation.yml
Acme\SocialBundle\Entity\Person:
properties:
age:
- IdenticalTo:
value: 20
.. code-block:: php-annotations
// src/Acme/SocialBundle/Entity/Person.php
namespace Acme\SocialBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
/**
* @Assert\IdenticalTo(
* value = 20
* )
*/
protected $age;
}
.. code-block:: xml
<!-- src/Acme/SocialBundle/Resources/config/validation.xml -->
<class name="Acme\SocialBundle\Entity\Person">
<property name="age">
<constraint name="IdenticalTo">
<option name="value">20</option>
</constraint>
</property>
</class>
.. code-block:: php
// src/Acme/SocialBundle/Entity/Person.php
namespace Acme\SocialBundle\Entity;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('age', new Assert\IdenticalTo(array(
'value' => 20,
)));
}
}
type: string default: This value should be identical to {{ compared_value_type }} {{ compared_value }}.
This is the message that will be shown if the value is not identical.