.. versionadded:: 2.3
The ``LessThan`` constraint was introduced in Symfony 2.3.
Validates that a value is less than another value, defined in the options. To force that a value is less than or equal to another value, see :doc:`/reference/constraints/LessThanOrEqual`. To force a value is greater than another value, see :doc:`/reference/constraints/GreaterThan`.
The following constraints ensure that:
- the number of
siblingsof aPersonis less than5 ageis less than80
.. configuration-block::
.. code-block:: php-annotations
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
/**
* @Assert\LessThan(5)
*/
protected $siblings;
/**
* @Assert\LessThan(
* value = 80
* )
*/
protected $age;
}
.. code-block:: yaml
# src/AppBundle/Resources/config/validation.yml
AppBundle\Entity\Person:
properties:
siblings:
- LessThan: 5
age:
- LessThan:
value: 80
.. code-block:: xml
<!-- src/AppBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="AppBundle\Entity\Person">
<property name="siblings">
<constraint name="LessThan">
<value>5</value>
</constraint>
</property>
<property name="age">
<constraint name="LessThan">
<option name="value">80</option>
</constraint>
</property>
</class>
</constraint-mapping>
.. code-block:: php
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('siblings', new Assert\LessThan(5));
$metadata->addPropertyConstraint('age', new Assert\LessThan(array(
'value' => 80,
)));
}
}
.. versionadded:: 2.6
The feature to compare dates was introduced in Symfony 2.6.
This constraint can be used to compare DateTime objects against any date
string accepted by the DateTime constructor. For example, you could check
that a date must be in the past like this:
.. configuration-block::
.. code-block:: php-annotations
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
/**
* @Assert\LessThan("today")
*/
protected $dateOfBirth;
}
.. code-block:: yaml
# src/AppBundle/Resources/config/validation.yml
AppBundle\Entity\Person:
properties:
dateOfBirth:
- LessThan: today
.. code-block:: xml
<!-- src/AppBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="AppBundle\Entity\Person">
<property name="dateOfBirth">
<constraint name="LessThan">today</constraint>
</property>
</class>
</constraint-mapping>
.. code-block:: php
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('dateOfBirth', new Assert\LessThan('today'));
}
}
Be aware that PHP will use the server's configured timezone to interpret these dates. If you want to fix the timezone, append it to the date string:
.. configuration-block::
.. code-block:: php-annotations
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
/**
* @Assert\LessThan("today UTC")
*/
protected $dateOfBirth;
}
.. code-block:: yaml
# src/AppBundle/Resources/config/validation.yml
AppBundle\Entity\Person:
properties:
dateOfBirth:
- LessThan: today UTC
.. code-block:: xml
<!-- src/AppBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="AppBundle\Entity\Person">
<property name="dateOfBirth">
<constraint name="LessThan">today UTC</constraint>
</property>
</class>
</constraint-mapping>
.. code-block:: php
// src/AppBundle/Entity/Person.php
namespace AppBundle\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\LessThan('today UTC'));
}
}
The DateTime class also accepts relative dates or times. For example, you
can check that a person must be at least 18 years old like this:
.. configuration-block::
.. code-block:: php-annotations
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
/**
* @Assert\LessThan("-18 years")
*/
protected $dateOfBirth;
}
.. code-block:: yaml
# src/AppBundle/Resources/config/validation.yml
AppBundle\Entity\Person:
properties:
dateOfBirth:
- LessThan: -18 years
.. code-block:: xml
<!-- src/AppBundle/Resources/config/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="AppBundle\Entity\Person">
<property name="dateOfBirth">
<constraint name="LessThan">-18 years</constraint>
</property>
</class>
</constraint-mapping>
.. code-block:: php
// src/AppBundle/Entity/Person.php
namespace AppBundle\Entity;
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;
class Person
{
public static function loadValidatorMetadata(ClassMetadata $metadata)
{
$metadata->addPropertyConstraint('dateOfBirth', new Assert\LessThan('-18 years'));
}
}
type: string default: This value should be less than {{ compared_value }}.
This is the message that will be shown if the value is not less than the comparison value.