EqualTo¶

2.3 新版功能: The EqualTo constraint was introduced in Symfony 2.3.

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

警告

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

Applies to	property or method
Options	value message
Class	`EqualTo`
Validator	`EqualToValidator`

Basic Usage¶

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

YAML

# src/Acme/SocialBundle/Resources/config/validation.yml
Acme\SocialBundle\Entity\Person:
    properties:
        age:
            - EqualTo:
                value: 20

Annotations

// src/Acme/SocialBundle/Entity/Person.php
namespace Acme\SocialBundle\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Person
{
    /**
     * @Assert\EqualTo(
     *     value = 20
     * )
     */
    protected $age;
}

XML

<!-- src/Acme/SocialBundle/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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="Acme\SocialBundle\Entity\Person">
        <property name="age">
            <constraint name="EqualTo">
                <option name="value">20</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>

PHP

// src/Acme/SocialBundle/Entity/Person.php
namespace Acme\SocialBundle\Entity;

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

class Person
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('age', new Assert\EqualTo(array(
            'value' => 20,
        )));
    }
}

Options¶

value¶

type: mixed [default option]

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

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.