Type

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Validates that a value is of a specific data type. For example, if a variable should be an array, you can use this constraint with the array type option to validate this.

Applies to	property or method
Options	type groups message payload
Class	Type
Validator	TypeValidator

Basic Usage

This will check that id is an instance of Ramsey\Uuid\UuidInterface, firstName is of type string and age is an integer.

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        // src/AppBundle/Entity/Author.php
namespace AppBundle\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Author
{
    /**
     * @Assert\Type("Ramsey\Uuid\UuidInterface")
     */
    protected $id;

    /**
     * @Assert\Type("string")
     */
    protected $firstName;

    /**
     * @Assert\Type(
     *     type="integer",
     *     message="The value {{ value }} is not a valid {{ type }}."
     * )
     */
    protected $age;
}
    

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        # src/AppBundle/Resources/config/validation.yml
AppBundle\Entity\Author:
    properties:
        id:
            - Type: Ramsey\Uuid\UuidInterface

        firstName:
            - Type: string

        age:
            - Type:
                type: integer
                message: The value {{ value }} is not a valid {{ type }}.
    

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        <!-- src/AppBundle/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 https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="AppBundle\Entity\Author">
        <property name="id">
            <constraint name="Type">
                <option name="type">Ramsey\Uuid\UuidInterface</option>
            </constraint>
        </property>
        <property name="firstName">
            <constraint name="Type">
                <option name="type">string</option>
            </constraint>
        </property>
        <property name="age">
            <constraint name="Type">
                <option name="type">integer</option>
                <option name="message">The value {{ value }} is not a valid {{ type }}.</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>
    

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        // src/AppBundle/Entity/Author.php
namespace AppBundle\Entity;

use Ramsey\Uuid\UuidInterface;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Mapping\ClassMetadata;

class Author
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('id', new Assert\Type(UuidInterface::class));

        $metadata->addPropertyConstraint('firstName', new Assert\Type('string'));

        $metadata->addPropertyConstraint('age', new Assert\Type([
            'type' => 'integer',
            'message' => 'The value {{ value }} is not a valid {{ type }}.',
        ]));
    }
}
    

Options

`type`

type: string [default option]

This required option is either the FQCN (fully qualified class name) of some PHP class/interface or a valid PHP datatype (checked by PHP's is_() functions):

Also, you can use ctype_() functions from corresponding built-in PHP extension. Consider a list of ctype functions:

Make sure that the proper locale is set before using one of these.

`groups`

type: array | string

It defines the validation group or groups this constraint belongs to. Read more about validation groups.

`message`

type: string default: This value should be of type {{ type }}.

The message if the underlying data is not of the given type.

You can use the following parameters in this message:

Parameter	Description
`{{ value }}`	The current (invalid) value
`{{ type }}`	The expected type

`payload`

type: mixed default: null

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.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.

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