EqualTo

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

Caution

This constraint compares using ==, so 3 and "3" are considered equal. Use IdenticalTo to compare with ===.

Applies to	property or method
Class	EqualTo
Validator	EqualToValidator

Basic Usage

If you want to ensure that the firstName of a Person class is equal to Mary and that the age is 20, you could do the following:

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

use Symfony\Component\Validator\Constraints as Assert;

class Person
{
    #[Assert\EqualTo('Mary')]
    protected string $firstName;

    #[Assert\EqualTo(
        value: 20,
    )]
    protected int $age;
}
    

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        # config/validator/validation.yaml
App\Entity\Person:
    properties:
        firstName:
            - EqualTo: Mary
        age:
            - EqualTo:
                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="EqualTo">
                Mary
            </constraint>
        </property>
        <property name="age">
            <constraint name="EqualTo">
                <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): void
    {
        $metadata->addPropertyConstraint('firstName', new Assert\EqualTo('Mary'));

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

Options

`groups`

type: array | string default: null

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

`message`

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

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

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 default: null

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.

`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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