IdenticalTo

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Validates that a value is identical to another value, defined in the options. To force that a value is not identical, see NotIdenticalTo.

Caution

This constraint compares using ===, so 3 and "3" are not considered equal. Use EqualTo to compare with ==.

Applies to	property or method
Class	IdenticalTo
Validator	IdenticalToValidator

Basic Usage

The following constraints ensure that:

firstName of Person class is equal to Mary and is a string
age is equal to 20 and is of type integer

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

use Symfony\Component\Validator\Constraints as Assert;

class Person
{
    /**
     * @Assert\IdenticalTo("Mary")
     */
    protected $firstName;

    /**
     * @Assert\IdenticalTo(
     *     value = 20
     * )
     */
    protected $age;
}
    

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        # config/validator/validation.yaml
App\Entity\Person:
    properties:
        firstName:
            - IdenticalTo: Mary
        age:
            - IdenticalTo:
                value: 20
    

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

    <class name="App\Entity\Person">
        <property name="firstName">
            <constraint name="IdenticalTo">
                Mary
            </constraint>
        </property>
        <property name="age">
            <constraint name="IdenticalTo">
                <option name="value">20</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>
    

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

use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Mapping\ClassMetadata;

class Person
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('firstName', new Assert\IdenticalTo('Mary'));

        $metadata->addPropertyConstraint('age', new Assert\IdenticalTo([
            'value' => 20,
        ]));
    }
}
    

Options

`groups`

type: array | string

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

`message`

type: string default: This value should be identical to {{ compared_value_type }} {{ compared_value }}.

This is the message that will be shown if the value is not identical.

You can use the following parameters in this message:

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

`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.

`propertyPath`

type: string

It defines the object property whose value is used to make the comparison.

For example, if you want to compare the $endDate property of some object with regard to the $startDate property of the same object, use propertyPath="startDate" in the comparison constraint of $endDate.

Tip

When using this option, its value is available in error messages as the {{ compared_value_path }} placeholder. Although it's not intended to include it in the error messages displayed to end users, it's useful when using APIs for doing any mapping logic on client-side.

4.4

The {{ compared_value_path }} placeholder was introduced in Symfony 4.4.

`value`

type: mixed [default option]

This option is required. It defines the comparison value. It can be a string, number or object.

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

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