dongxuxian1123
2014-01-16 07:17
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Symfony2 - 从具有多个参数的控制器参数列表访问Request对象

I am using Symfony 2.4, and according to the Docs, the correct way of retrieving the Request object in the controller is the following:

/**
 * @Route("/register/next", name="next_registration_step")
 */
public function nextAction(Request $request = null) {...}

This works as expected. However, if I add a parameter to the controller, $request becomes null at runtime:

/**
 * @Route("/register/next/{currentStep}", name="next_registration_step")
 */
public function nextAction(Request $request = null, $currentStep = 0) {...}

How do I work around this issue without using any older-but-deprecated methods for getting the request?

Note: if possible, a solution that does not involve the Request Stack recently introduced to Symfony 2.4 would be great, as it seems like overkill.

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我正在使用Symfony 2.4,根据文档,在控制器中检索Request对象的正确方法是 以下内容:

  / ** 
 * @Route(“/ register / next”,name =“next_registration_step”)
 * / 
 npublic function nextAction(Request $  request = null){...} 
   
 
 

这可以按预期工作。 但是,如果我向控制器添加一个参数,$ request在运行时变为空:

  / ** 
 * @Route(“/ register / next / {currentStep}  “,name =”next_registration_step“)
 * / 
 npublic function nextAction(Request $ request = null,$ currentStep = 0){...} 
   
 
 

如何在不使用任何旧的但已弃用的方法来获取请求的情况下解决此问题?

注意:如果可能,最近向Symfony引入不涉及请求堆栈的解决方案 2.4会很棒,因为看起来有点矫枉过正。

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1条回答 默认 最新

  • doufang8282 2014-01-16 07:24
    已采纳

    This works,

    as I think the only difference is that I do not pass = null in parameters declaration

    use Symfony\Component\HttpFoundation\Request;
    
    /**
     * @Route("/hello/{name}", name="_demo_hello")
     */
    public function helloAction(Request $request, $name)
    {
        var_dump($request, $name);die();
    

    In Symfony2 controllers it's not a good Idea to declare default value in the method definition - it should be done in routing definition.

    In your case:

     /*
     *
     * @Route("/register/next/{currentStep}", name="next_registration_step", defaults={"currentStep" = 0})
     */
    public function next(Request $request, $currentStep) {...}
    

    regards,

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