Blank
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Blank
Validates that a value is blank, defined as equal to a blank string or equal
to null. To force that a value strictly be equal to null, see the
Null constraint. To force that a value is
not blank, see NotBlank.
| Applies to | property or method |
| Options | |
| Class | Blank |
| Validator | BlankValidator |
Basic Usage
If, for some reason, you wanted to ensure that the firstName property
of an Author class were blank, you could do the following:
- Annotations
- YAML
- XML
- PHP
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// src/Acme/BlogBundle/Entity/Author.php
namespace Acme\BlogBundle\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Author
{
/**
* @Assert\Blank()
*/
protected $firstName;
}Options
message
type: string default: This value should be blank.
This is the message that will be shown if the value is not blank.
payload
type: mixed default: null
2.6
The payload option was introduced in Symfony 2.6.
This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to you.
For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.
