Symfony2 : Handling form submissions

Question

这是我第一次尝试处理表单，我遵循官方documentation for Symfony 2.3 。显示表单已经成功，但我无法处理它。

我收到以下错误:

Catchable Fatal Error: Argument 2 passed to Symfony\Component\Validator\Mapping\ClassMetadata::addPropertyConstraint() must be an instance of Symfony\Component\Validator\Constraint, array given, called in /home/torob/lampstack-5.4.16-0/apache2/htdocs/A/vendor/symfony/symfony/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php on line 90 and defined in /home/torob/lampstack-5.4.16-0/apache2/htdocs/A/vendor/symfony/symfony/src/Symfony/Component/Validator/Mapping/ClassMetadata.php line 193

500 Internal Server Error - ContextErrorException

这是我的 Controller :

public function newIdeaPostAction(Request $request){
    $idea = new Idea();

    $form = $this->createFormBuilder($idea)
        ->add('title', 'text')
        ->add('shortDescription', 'text')
        ->add('valueDescription', 'text')
        ->add('description', 'textarea')
        ->add('Next', 'submit')
        ->getForm();

    $form->handleRequest($request);

    if($form->isValid()){
        return $this->redirect($this->generateUrl('ideside_idea_success'));
    }
}

我知道是方法调用 $form->handleRequest($request) 造成了错误。我还尝试按照 2.1 文档中的“旧方法”进行操作(他们说 handleRequest 方法是新的):

if ($request->isMethod('POST')) {
    $form->bind($request);
    if ($form->isValid()) {
        // perform some action, such as saving the task to the database
        return $this->redirect($this->generateUrl('task_success'));
    }
}

这给了我同样的错误。

额外信息:

路线如下:

ideside_newidea_post:
  path: /post/idea
  defaults:  { _controller: IdesideIdeaBundle:Default:newIdeaPost }
  methods:  [POST]

这是堆栈跟踪(...nameofproject/vendor/symfony/symfony/src/Symfony/Component/Validator/Mapping/ClassMetadata.php):

 *
 * @return ClassMetadata This object
 */
public function addPropertyConstraint($property, Constraint $constraint)
{
    if (!isset($this->properties[$property])) {
        $this->properties[$property] = new PropertyMetadata($this->getClassName(), $property);

这是我的validation.yml(尽管我不知道它是否相关，因为错误发生在我的 Controller 中调用 isValid 函数之前):

Ideside\IdeaBundle\Entity\Idea:
    properties:
        title:
            - NotBlank: {message: "blabla"}
        shortDescription:
            - NotBlank: {message: "blabla"}
            - Length: {max: 115, maxMessage: "blabla", min: 6, minMessage: "blabla"}
        valueDescription:
            -Length: {max: 115, maxMessage: "blabla", min: 5, minMessage: "blabla"}
        description:
            - Length: {max: 5000, maxMessage: "blabla"}

如果这被证明是某种低级错误，很抱歉打扰你们。如果你们中的任何人能帮助我解决这个问题，那么您将帮我一个很大的忙(如果我们的项目按预期进行，也可能是整个世界)。

Answer 1

哇，这个花了我一段时间才弄清楚...您只是缺少 valueDescription 长度属性中的破折号和“L”之间的空格。

Ideside\IdeaBundle\Entity\Idea:
    properties:
        title:
            - NotBlank: {message: "blabla"}
        shortDescription:
            - NotBlank: {message: "blabla"}
            - Length: {max: 115, maxMessage: "blabla", min: 6, minMessage: "blabla"}
        valueDescription:
            // This is the original line
            // You do not have a space between the dash and Length
            // -Length: {max: 115, maxMessage: "blabla", min: 5, minMessage: "blabla"}
            // It should be this
            - Length: {max: 115, maxMessage: "blabla", min: 5, minMessage: "blabla"}
        description:
            - Length: {max: 5000, maxMessage: "blabla"}