Valid.rst

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	:ref:`property or method<validation-property-target>`
Options	traverse
Class	:class:`Symfony\\Component\\Validator\\Constraints\\Type`

Basic Usage

In the following example, we 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/Address.php
class Address
{
    protected $street;
    protected $zipCode;
}

// src/Acme/HelloBundle/Author.php
class Author
{
    protected $firstName;
    protected $lastName;
    protected $address;
}

.. configuration-block::

    .. code-block:: yaml

        # src/Acme/HelloBundle/Resources/config/validation.yml
        Acme\HelloBundle\Address:
            properties:
                street:
                    - NotBlank: ~
                zipCode:
                    - NotBlank: ~
                    - MaxLength: 5

        Acme\HelloBundle\Author:
            properties:
                firstName:
                    - NotBlank: ~
                    - MinLength: 4
                lastName:
                    - NotBlank: ~

    .. code-block:: xml

        <!-- src/Acme/HelloBundle/Resources/config/validation.xml -->
        <class name="Acme\HelloBundle\Address">
            <property name="street">
                <constraint name="NotBlank" />
            </property>
            <property name="zipCode">
                <constraint name="NotBlank" />
                <constraint name="MaxLength">5</constraint>
            </property>
        </class>

        <class name="Acme\HelloBundle\Author">
            <property name="firstName">
                <constraint name="NotBlank" />
                <constraint name="MinLength">4</constraint>
            </property>
            <property name="lastName">
                <constraint name="NotBlank" />
            </property>
        </class>

    .. code-block:: php-annotations

        // src/Acme/HelloBundle/Address.php
        use Symfony\Component\Validator\Constraints as Assert;

        class Address
        {
            /**
             * @Assert\NotBlank()
             */
            protected $street;

            /**
             * @Assert\NotBlank
             * @Assert\MaxLength(5)
             */
            protected $zipCode;
        }

        // src/Acme/HelloBundle/Author.php
        class Author
        {
            /**
             * @Assert\NotBlank
             * @Assert\MinLength(4)
             */
            protected $firstName;

            /**
             * @Assert\NotBlank
             */
            protected $lastName;

            protected $address;
        }

    .. code-block:: php

        // src/Acme/HelloBundle/Address.php
        use Symfony\Component\Validator\Mapping\ClassMetadata;
        use Symfony\Component\Validator\Constraints\NotBlank;
        use Symfony\Component\Validator\Constraints\MaxLength;

        class Address
        {
            protected $street;

            protected $zipCode;

            public static function loadValidatorMetadata(ClassMetadata $metadata)
            {
                $metadata->addPropertyConstraint('street', new NotBlank());
                $metadata->addPropertyConstraint('zipCode', new NotBlank());
                $metadata->addPropertyConstraint('zipCode', new MaxLength(5));
            }
        }

        // src/Acme/HelloBundle/Author.php
        use Symfony\Component\Validator\Mapping\ClassMetadata;
        use Symfony\Component\Validator\Constraints\NotBlank;
        use Symfony\Component\Validator\Constraints\MinLength;

        class Author
        {
            protected $firstName;

            protected $lastName;

            protected $address;

            public static function loadValidatorMetadata(ClassMetadata $metadata)
            {
                $metadata->addPropertyConstraint('firstName', new NotBlank());
                $metadata->addPropertyConstraint('firstName', new MinLength(4));
                $metadata->addPropertyConstraint('lastName', new 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.

.. configuration-block::

    .. code-block:: yaml

        # src/Acme/HelloBundle/Resources/config/validation.yml
        Acme\HelloBundle\Author:
            properties:
                address:
                    - Valid: ~

    .. code-block:: xml

        <!-- src/Acme/HelloBundle/Resources/config/validation.xml -->
        <class name="Acme\HelloBundle\Author">
            <property name="address">
                <constraint name="Valid" />
            </property>
        </class>

    .. code-block:: php-annotations

        // src/Acme/HelloBundle/Author.php
        use Symfony\Component\Validator\Constraints as Assert;

        class Author
        {
            /* ... */

            /**
             * @Assert\Valid
             */
            protected $address;
        }

    .. code-block:: php

        // src/Acme/HelloBundle/Author.php
        use Symfony\Component\Validator\Mapping\ClassMetadata;
        use Symfony\Component\Validator\Constraints\Valid;

        class Author
        {
            protected $address;

            public static function loadValidatorMetadata(ClassMetadata $metadata)
            {
                $metadata->addPropertyConstraint('address', new Valid());
            }
        }

If you validate an author with an invalid address now, you can see that the validation of the Address fields failed.

AcmeHelloBundleAuthor.address.zipCode: This value is too long. It should have 5 characters or less

Options

traverse

type: string 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.