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	message
Class	NotNull
Validator	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

  # src/Acme/BlogBundle/Resources/config/validation.yml
  Acme\BlogBundle\Entity\Author:
      properties:
          firstName:
              - NotNull: ~
  

• Annotations

  // src/Acme/BlogBundle/Entity/Author.php
  namespace Acme\BlogBundle\Entity;
  
  use Symfony\Component\Validator\Constraints as Assert;
  
  class Author
  {
      /**
       * @Assert\NotNull()
       */
      protected $firstName;
  }
  

• XML

  <!-- src/Acme/BlogBundle/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="Acme\BlogBundle\Entity\Author">
          <property name="firstName">
              <constraint name="NotNull" />
          </property>
      </class>
  </constraint-mapping>
  

• PHP

  // 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());
      }
  }
  

Options

message

type: string default: This value should not be null.

This is the message that will be shown if the value is null.