PositiveOrZero

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验证一个值是否为正数或等于零。如果你不想允许零值，请使用 Positive 代替。

适用于	属性或方法
类	PositiveOrZero
验证器	GreaterThanOrEqualValidator

基本用法

以下约束确保 Person 的兄弟姐妹数量为正数或零

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

use Symfony\Component\Validator\Constraints as Assert;

class Person
{
    #[Assert\PositiveOrZero]
    protected int $siblings;
}
    

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        # config/validator/validation.yaml
App\Entity\Person:
    properties:
        siblings:
            - PositiveOrZero: ~
    

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        <!-- config/validator/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.ac.cn/schema/dic/constraint-mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.ac.cn/schema/dic/constraint-mapping http://symfony.ac.cn/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="App\Entity\Person">
        <property name="siblings">
            <constraint name="PositiveOrZero"></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('siblings', new Assert\PositiveOrZero());
    }
}
    