Базовое использование

Следующее ограничение гарантирует, что income в Employee является положительным числом (больше нуля):

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

use Symfony\Component\Validator\Constraints as Assert;

class Employee
{
    #[Assert\Positive]
    protected $income;
}

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# config/validator/validation.yaml
App\Entity\Employee:
    properties:
        income:
            - Positive: ~

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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\Employee">
        <property name="income">
            <constraint name="Positive"></constraint>
        </property>
    </class>
</constraint-mapping>

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

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


class Employee
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('income', new Assert\Positive());
    }
}

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