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What happened last week in Symfony?
This week, the new Symfony 2.3 branch was created. In addition, the first Symfony 2.3 release candidate version was published, which includes tons of great small improvements. Lastly, one of the biggest Symfony events of the year, the Symfony Live Portland 2013 conference, will take place next week.
Upcoming EventsThe Symfony Community organizes events all over the world on a regular basis. Here are the next ones.
Netherlands, Utrecht — Symfony Meetup - Netherlands/Utrecht
on May 22, 2013, from 19:00 to 22:00
France, Montpellier — eZ UnConference #2
from May 27, 2013 to May 29, 2013
Germany, München — Symfony User Group München
on June 05, 2013, from 18:30 to 22:30
Germany, Köln — Symfony User Group Cologne steht an!
on June 05, 2013, from 19:00 to 22:00 - About
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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 | 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
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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()); } }
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