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NotNull
NotNull¶
Validates that a value is not strictly equal to null
. To ensure that
a value is simply not blank (not a blank string), see the NotBlank
constraint.
Applies to | property or method |
Options | |
Class | Symfony\Component\Validator\Constraints\NotNull |
Validator | Symfony\Component\Validator\Constraints\NotNullValidator |
Basic Usage¶
If you wanted to ensure that the firstName
property of an Author
class
were not strictly equal to null
, you would:
- YAML
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# src/BlogBundle/Resources/config/validation.yml Acme\BlogBundle\Entity\Author: properties: firstName: - NotNull: ~
- Annotations
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// src/Acme/BlogBundle/Entity/Author.php namespace Acme\BlogBundle\Entity; use Symfony\Component\Validator\Constraints as Assert; class Author { /** * @Assert\NotNull() */ protected $firstName; }
- XML
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<!-- src/Acme/BlogBundle/Resources/config/validation.xml --> <class name="Acme\BlogBundle\Entity\Author"> <property name="firstName"> <constraint name="NotNull" /> </property> </class>
- PHP
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// src/Acme/BlogBundle/Entity/Author.php namespace Acme\BlogBundle\Entity; use Symfony\Component\Validator\Mapping\ClassMetadata; use Symfony\Component\Validator\Constraints as Assert; class Author { public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('firstName', new Assert\NotNull()); } }
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.