正数

编辑此页

验证一个值是否为正数。零既不是正数也不是负数，如果您想允许零作为值，则必须使用 PositiveOrZero。

适用于	属性或方法
类	正数
验证器	GreaterThanValidator

基本用法

以下约束确保 Employee 的 income 属性是一个正数（大于零）

        1
2
3
4
5
6
7
8
9
10
        // src/Entity/Employee.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

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

        1
2
3
4
5
        # config/validator/validation.yaml
App\Entity\Employee:
    properties:
        income:
            - Positive: ~
    

        1
2
3
4
5
6
7
8
9
10
11
12
        <!-- 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\Employee">
        <property name="income">
            <constraint name="Positive"></constraint>
        </property>
    </class>
</constraint-mapping>
    

        1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
        // 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): void
    {
        $metadata->addPropertyConstraint('income', new Assert\Positive());
    }
}
    