Symfony数据校验方法实例分析(3)

class Author
{
   /**
    * @Assert\Choice(
    *     choices = {"male","female"},
    *     message = "Choose a valid gender."
    * )
    */
    public $gender;
}

XML格式：

复制代码 代码如下:

<!-- src/Acme/BlogBundle/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 ">

<class>
        <property>
            <constraint>
                <option>
                    <value>male</value>
                    <value>female</value>
                </option>
                <option>Choose a valid gender.</option>
            </constraint>
        </property>
    </class>
</constraint-mapping>

PHP代码格式：

复制代码 代码如下:

// src/Acme/BlogBundle/Entity/Author.php
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints\NotBlank;

class Author
{
    public $gender;

public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('gender', new Choice(array(
            'choices' => array('male', 'female'),
            'message' => 'Choose a valid gender.',
        )));
    }
}

一个约束的选项通常都是通过一个数组来传递的。有些约束也允许你传递一个值。"default"在数组中是可选的。在Choice约束时，choices选项就可以通过这种方式指定。

YAML格式：

复制代码 代码如下:

# src/Acme/BlogBundle/Resources/config/validation.yml
Acme\BlogBundle\Entity\Author:
    properties:
        gender:
            - Choice: [male, female]

类声明格式：

复制代码 代码如下:

// src/Acme/BlogBundle/Entity/Author.php
use Symfony\Component\Validator\Constraints as Assert;

class Author
{
    /**
     * @Assert\Choice({"male", "female"})
     */
    protected $gender;
}

XML格式：

复制代码 代码如下:

<!-- src/Acme/BlogBundle/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 ">

<class>
        <property>
            <constraint>
                <value>male</value>
                <value>female</value>
            </constraint>
        </property>
    </class>
</constraint-mapping>

PHP格式：

复制代码 代码如下:

// src/Acme/BlogBundle/Entity/Author.php
use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints\Choice;

class Author
{
    protected $gender;