NotBlank
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NotBlank
Validates that a value is not blank, defined as not equal to a blank string
and also not equal to null
. To force that a value is simply not equal to
null
, see the NotNull constraint.
Applies to | property or method |
Options | |
Class | NotBlank |
Validator | NotBlankValidator |
Basic Usage
If you wanted to ensure that the firstName
property of an Author
class
were not blank, you could do the following:
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# src/BlogBundle/Resources/config/validation.yml
Acme\BlogBundle\Entity\Author:
properties:
firstName:
- NotBlank: ~
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// src/Acme/BlogBundle/Entity/Author.php
namespace Acme\BlogBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Author
{
/**
* @Assert\NotBlank()
*/
protected $firstName;
}
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<!-- src/Acme/BlogBundle/Resources/config/validation.xml -->
<class name="Acme\BlogBundle\Entity\Author">
<property name="firstName">
<constraint name="NotBlank" />
</property>
</class>
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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\NotBlank());
}
}