验证值是否具有有效的 JSON 语法。
| 适用于 | 属性或方法 |
| 类 | Json |
| 验证器 | JsonValidator |
Json 约束可以应用于属性或 “getter” 方法
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// src/Entity/Book.php
namespace App\Entity;
use Symfony\Component\Validator\Constraints as Assert;
class Book
{
#[Assert\Json(
message: "You've entered an invalid Json."
)]
private string $chapters;
}1 2 3 4 5 6
# config/validator/validation.yaml
App\Entity\Book:
properties:
chapters:
- Json:
message: You've entered an invalid Json.1 2 3 4 5 6 7 8 9 10 11 12 13 14
<!-- config/validator/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="https://symfony.ac.cn/schema/dic/constraint-mapping"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://symfony.ac.cn/schema/dic/constraint-mapping https://symfony.ac.cn/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
<class name="App\Entity\Book">
<property name="chapters">
<constraint name="Json">
<option name="message">You've entered an invalid Json.</option>
</constraint>
</property>
</class>
</constraint-mapping>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// src/Entity/Book.php
namespace App\Entity;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Mapping\ClassMetadata;
class Book
{
public static function loadValidatorMetadata(ClassMetadata $metadata): void
{
$metadata->addPropertyConstraint('chapters', new Assert\Json([
'message' => 'You\'ve entered an invalid Json.',
]));
}
}