Valid¶
This constraint is used to enable validation on objects that are embedded as properties on an object being validated. This allows you to validate an object and all sub-objects associated with it.
Applies to | property or method |
Options | |
Class | Valid |
小技巧
By default the error_bubbling option is enabled for the collection Field Type, which passes the errors to the parent form. If you want to attach the errors to the locations where they actually occur you have to set error_bubbling to false.
Basic Usage¶
In the following example, create two classes Author and Address that both have constraints on their properties. Furthermore, Author stores an Address instance in the $address property.
// src/Acme/HelloBundle/Entity/Address.php
namespace Acme\HelloBundle\Entity;
class Address
{
protected $street;
protected $zipCode;
}
// src/Acme/HelloBundle/Entity/Author.php
namespace Acme\HelloBundle\Entity;
class Author
{
protected $firstName;
protected $lastName;
protected $address;
}
- YAML
# src/Acme/HelloBundle/Resources/config/validation.yml Acme\HelloBundle\Entity\Address: properties: street: - NotBlank: ~ zipCode: - NotBlank: ~ - Length: max: 5 Acme\HelloBundle\Entity\Author: properties: firstName: - NotBlank: ~ - Length: min: 4 lastName: - NotBlank: ~
- Annotations
// src/Acme/HelloBundle/Entity/Address.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Constraints as Assert; class Address { /** * @Assert\NotBlank() */ protected $street; /** * @Assert\NotBlank * @Assert\Length(max = 5) */ protected $zipCode; } // src/Acme/HelloBundle/Entity/Author.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Constraints as Assert; class Author { /** * @Assert\NotBlank * @Assert\Length(min = 4) */ protected $firstName; /** * @Assert\NotBlank */ protected $lastName; protected $address; }
- XML
<!-- src/Acme/HelloBundle/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\HelloBundle\Entity\Address"> <property name="street"> <constraint name="NotBlank" /> </property> <property name="zipCode"> <constraint name="NotBlank" /> <constraint name="Length"> <option name="max">5</option> </constraint> </property> </class> <class name="Acme\HelloBundle\Entity\Author"> <property name="firstName"> <constraint name="NotBlank" /> <constraint name="Length"> <option name="min">4</option> </constraint> </property> <property name="lastName"> <constraint name="NotBlank" /> </property> </class> </constraint-mapping>
- PHP
// src/Acme/HelloBundle/Entity/Address.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Mapping\ClassMetadata; use Symfony\Component\Validator\Constraints as Assert; class Address { protected $street; protected $zipCode; public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('street', new Assert\NotBlank()); $metadata->addPropertyConstraint('zipCode', new Assert\NotBlank()); $metadata->addPropertyConstraint('zipCode', new Assert\Length(array("max" => 5))); } } // src/Acme/HelloBundle/Entity/Author.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Mapping\ClassMetadata; use Symfony\Component\Validator\Constraints as Assert; class Author { protected $firstName; protected $lastName; protected $address; public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('firstName', new Assert\NotBlank()); $metadata->addPropertyConstraint('firstName', new Assert\Length(array("min" => 4))); $metadata->addPropertyConstraint('lastName', new Assert\NotBlank()); } }
With this mapping, it is possible to successfully validate an author with an invalid address. To prevent that, add the Valid constraint to the $address property.
- YAML
# src/Acme/HelloBundle/Resources/config/validation.yml Acme\HelloBundle\Entity\Author: properties: address: - Valid: ~
- Annotations
// src/Acme/HelloBundle/Entity/Author.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Constraints as Assert; class Author { /** * @Assert\Valid */ protected $address; }
- XML
<!-- src/Acme/HelloBundle/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\HelloBundle\Entity\Author"> <property name="address"> <constraint name="Valid" /> </property> </class> </constraint-mapping>
- PHP
// src/Acme/HelloBundle/Entity/Author.php namespace Acme\HelloBundle\Entity; use Symfony\Component\Validator\Mapping\ClassMetadata; use Symfony\Component\Validator\Constraints as Assert; class Author { protected $address; public static function loadValidatorMetadata(ClassMetadata $metadata) { $metadata->addPropertyConstraint('address', new Assert\Valid()); } }
If you validate an author with an invalid address now, you can see that the validation of the Address fields failed.
Acme\\HelloBundle\\Author.address.zipCode:
This value is too long. It should have 5 characters or less.
Options¶
traverse¶
type: boolean default: true
If this constraint is applied to a property that holds an array of objects, then each object in that array will be validated only if this option is set to true.
deep¶
type: boolean default: false
If this constraint is applied to a property that holds an array of objects, then each object in that array will be validated recursively if this option is set to true.