Symfony 2 类未发现异常

Question

我在使用 symfony 2 时遇到了问题。在某个点之前一切正常。

我有一个简单的控制器动作、一个实体类和一个表单（抽象类型）类。我遇到了问题：

ClassNotFoundException：尝试从 /var/www/dellf2/src/Blogger/BlogBu​​ndle/Controller/PageController.php 第 26 行中的命名空间“Symfony\Blogger\BlogBu​​ndle\Entity”加载类“查询”。你需要“从另一个命名空间使用”它？

我检查了 Enquiry.php，它位于正确的位置 (Blogger/BlogBu​​ndle/Entity/Enquiry.php)。我检查了权限，它看起来很好（755）。即使我尝试使用 include_once() 包含文件，它也不起作用。

查询.php

// src/Blogger/BlogBundle/Entity/Enquiry.php

namespace Blogger\BlogBundle\Entity;

class Enquiry
{

protected $name;
protected $email;
protected $subject;
protected $body;

public function getName()
{
    return $this->name;
}

public function setName($name)
{
    $this->name = $name;
}

public function getEmail()
{
    return $this->email;
}

public function setEmail($email)
{
    $this->email = $email;
}

public function getSubject()
{
    return $this->subject;
}

public function setSubject($subject)
{
    $this->subject = $subject;
}

public function getBody()
{
    return $this->body;
}

public function setBody($body)
{
    $this->body = $body;
}

}

?>

PageController.php

<?php

// src/Blogger/BlogBundle/Controller/PageController.php

 namespace Blogger\BlogBundle\Controller;
 //include_once('../Entity/Enquiry.php');

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Blogger\BlogBundle\Entity\Enquiry;
use Symfony\Blogger\BlogBundle\Form\EnquiryType;

  class PageController extends Controller
{
public function indexAction()
{
    return $this->render('BloggerBlogBundle:Page:index.html.twig');
}

public function aboutAction()
{
    return $this->render('BloggerBlogBundle:Page:about.html.twig');
}

public function contactAction()
{
    $enquiry = new Enquiry();
    $form = $this->createForm(new EnquiryType(), $enquiry);

    $request = $this->getRequest();
    if($request->getMethod() == 'POST'){
        $form->bindRequest($request);

        if($form->isValid()){
            //Perform some action, such as sending an email

            //Redirect - This is important to prevent users re-posting the form if they refresh the page
            return $this->redirect($this->generateUrl('BloggerBlogBundle_contact'));
        }
    }
    return $this->render('BloggerBlogBundle:Page:contact.html.twig', array('form'=> $form->createView()));
}
 }

Answer 1

在同一个示例中，弹出了类似的错误。

Attempted to load class "MaxLength" from namespace "Symfony\Component\Validator\Constraints".
Did you forget a "use" statement for another namespace?
500 Internal Server Error - ClassNotFoundException

       $metadata->addPropertyConstraint('subject', new NotBlank());
 -->   $metadata->addPropertyConstraint('subject', new MaxLength(50));
       $metadata->addPropertyConstraint('body', new MinLength(50));

最终发现问题在于使用了一组折旧的类。

而不是使用：

use Symfony\Component\Validator\Constraints\MinLength;
use Symfony\Component\Validator\Constraints\MaxLength;

和

$metadata->addPropertyConstraint('subject', new MaxLength(50));
$metadata->addPropertyConstraint('body', new MinLength(50));

你应该使用：

use Symfony\Component\Validator\Constraints\Length;

和

$metadata->addPropertyConstraint('subject', new Length(array('max' => 50)));
$metadata->addPropertyConstraint('body', new Length(array('min' => 50)));

参考资料：

http://symfony.com/doc/2.1/reference/constraints/Length.html http://symfony.com/doc/2.1/reference/constraints/MinLength.html

MinLength 约束自 2.1 版起已弃用，并将 在 Symfony 2.3 中删除。请改用 Length 和 min 选项。

Answer 2

尝试添加

use \Blogger\BlogBundle\Entity\Enquiry;

在命名空间行下。

也许自动加载器在错误的地方搜索。