我想做的是:
在yml中定义约束
用它来验证数组
比如说,一个产品数组:
$product['name'] = 'A book';
$product['date'] = '2012-09';
$product['price'] = '21.5';
怎么做?
最佳答案
首先,您需要知道 Symfony2 验证器还没有准备好轻松做到这一点。我花了一些时间和一些 Symfony2 源代码阅读来为你的案例找到一个可行的解决方案,而我的解决方案并不是那么自然。
我制作了一个包含验证器、您的数组和您的 yaml 配置文件的类,因此您将能够执行您期望的操作。此类扩展了 Symfony 的 YamlFileLoader
以访问 protected parseNodes
方法:这并不漂亮,但这是我发现将自定义 Yaml 配置文件转换为数组的唯一方法约束
对象。
所以我们到了。我给你我的代码,你需要根据自己的上下文替换一些 namespace 。
首先,为我们的演示创建一个 Controller :
public function indexAction()
{
// We create a sample validation file for the demo
$demo = <<< EOT
name:
- NotBlank: ~
- MinLength: { limit: 3 }
- MaxLength: { limit: 10 }
date:
- NotBlank: ~
- Regex: "/^[0-9]{4}\-[0-9]{2}$/"
price:
- Min: 0
EOT;
file_put_contents("/tmp/test.yml", $demo);
// We create your array to validate
$product = array ();
$product['name'] = 'A book';
$product['date'] = '2012-09';
$product['price'] = '21.5';
$validator = $this->get('validator');
$service = new \Fuz\TestsBundle\Services\ArrayValidator($validator, $product, "/tmp/test.yml");
$errors = $service->validate();
echo '<pre>';
var_dump($errors);
die();
return $this->render('FuzTestsBundle:Default:index.html.twig');
}
然后创建一个名为 ArrayValidator.php 的类。同样,请注意命名空间。
<?php
namespace Fuz\TestsBundle\Services;
use Symfony\Component\Validator\ValidatorInterface;
use Symfony\Component\Yaml\Parser;
use Symfony\Component\Validator\Mapping\Loader\YamlFileLoader;
/**
* This class inherits from YamlFileLoader because we need to call the
* parseNodes() protected method.
*/
class ArrayValidator extends YamlFileLoader
{
/* the @validator service */
private $validator;
/* The array to check */
private $array;
/* The file that contains your validation rules */
private $validationFile;
public function __construct(ValidatorInterface $validator, array $array = array(), $validationFile)
{
$this->validator = $validator;
$this->array = $array;
$this->validationFile = $validationFile;
}
/* The method that does what you want */
public function validate()
{
$yaml = file_get_contents($this->validationFile);
// We parse the yaml validation file
$parser = new Parser();
$parsedYaml = $parser->parse($yaml);
// We transform this validation array to a Constraint array
$arrayConstraints = $this->parseNodes($parsedYaml);
// For each elements of the array, we execute the validation
$errors = array();
foreach ($this->array as $key => $value)
{
$errors[$key] = array();
// If the array key (eg: price) has validation rules, we check the value
if (isset($arrayConstraints[$key]))
{
foreach ($arrayConstraints[$key] as $constraint)
{
// If there is constraint violations, we list messages
$violationList = $this->validator->validateValue($value, $constraint);
if (count($violationList) > 0)
{
foreach ($violationList as $violation)
{
$errors[$key][] = $violation->getMessage();
}
}
}
}
}
return $errors;
}
}
最后,使用 $product 数组中的不同值对其进行测试。
默认:
$product = array ();
$product['name'] = 'A book';
$product['date'] = '2012-09';
$product['price'] = '21.5';
将显示:
array(3) {
["name"]=>
array(0) {
}
["date"]=>
array(0) {
}
["price"]=>
array(0) {
}
}
如果我们将值更改为:
$product = array ();
$product['name'] = 'A very interesting book';
$product['date'] = '2012-09-03';
$product['price'] = '-21.5';
你会得到:
array(3) {
["name"]=>
array(1) {
[0]=>
string(61) "This value is too long. It should have 10 characters or less."
}
["date"]=>
array(1) {
[0]=>
string(24) "This value is not valid."
}
["price"]=>
array(1) {
[0]=>
string(31) "This value should be 0 or more."
}
}
希望这对您有所帮助。
关于php - Symonfy2 验证 : define constraints in yml, 并验证一个数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12527481/