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Type
- Basic Usage
- Options
  - type
  - message
  - payload

Type¶

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 message payload
Class	`Type`
Validator	`TypeValidator`

Basic Usage¶

This will check if firstName is of type string and that age is an integer.

Annotations

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

use Symfony\Component\Validator\Constraints as Assert;

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

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

YAML

# config/validator/validation.yaml
App\Entity\Author:
    properties:
        firstName:
            - Type: string

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

XML

<!-- config/validator/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="App\Entity\Author">
        <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>

PHP

// src/Entity/Author.php
namespace App\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\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 the fully qualified class name or one of the PHP datatypes as determined by PHP's is_() functions.

array
bool
callable
float
double
int
integer
iterable
long
null
numeric
object
real
resource
scalar
string

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

alnum
alpha
cntrl
digit
graph
lower
print
punct
space
upper
xdigit

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

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.