Symfony $ this

Symfony $ this - >> createFormBuilder从控制器发出通知(Symfony $this->>createFormBuilder throws notice from controller)

我正在Symfony做一个小项目，以获得这个框架的一些经验。 目前我只是在制作自己的工具时使用教程，这是一个用于制作简历的GUI。

在我的控制器中，我调用$this->createFormBuilder($cvBase) ，这是一个“未定义的属性”通知，我觉得这很奇怪，因为我正在调用一个方法。

有谁知道是什么原因造成的？

<?php // My php code namespace NuiCart\CvToolBundle\Controller; use Symfony\Bundle\FrameworkBundle\Controller\Controller; use NuiCart\CvToolBundle\Entity\CvBase; use Symfony\Component\HttpFoundation\Request; class DefaultController extends Controller{ public function formAction(Request $request){ $cvBase = new CvBase(); $form = new $this->createFormBuilder($cvBase);

通知：

注意：未定义的属性：/var/www/devel/cv/public_html/src/NuiCart/CvToolBundle/Controller/DefaultController.php中的NuiCart \ CvToolBundle \ Controller \ DefaultController :: $ createFormBuilder

第19行500内部服务器错误 - ContextErrorException

I am doing a small project in Symfony to gain some experience with this framework. At the moment I am just following tutorials while making my own tool which is a GUI to make my resume.

In my controller I am calling $this->createFormBuilder($cvBase) which is throwing an "Undefined property" notice which I think is strange because I am calling a method.

Does anyone know what is causing this?

<?php // My php code namespace NuiCart\CvToolBundle\Controller; use Symfony\Bundle\FrameworkBundle\Controller\Controller; use NuiCart\CvToolBundle\Entity\CvBase; use Symfony\Component\HttpFoundation\Request; class DefaultController extends Controller{ public function formAction(Request $request){ $cvBase = new CvBase(); $form = new $this->createFormBuilder($cvBase);

The notice:

Notice: Undefined property: NuiCart\CvToolBundle\Controller\DefaultController::$createFormBuilder in /var/www/devel/cv/public_html/src/NuiCart/CvToolBundle/Controller/DefaultController.php

line 19 500 Internal Server Error - ContextErrorException

最满意答案

createFormBuilder() 已经返回一个新创建的FormBuilder对象 ，因此您不需要创建新的Object。 通过尝试使用new ，它试图创建一个新的DefaultController并访问一个私有的Controller内部函数（或类似的东西 - 不要因为这个问题而起诉我的正确性，因为它只是尝试解释为什么使用new $this是错误的。）

您的解决方案是删除$this->createFormBuilder() ：

$form = $this->createFormBuilder($cvBase);

createFormBuilder() already returns a newly created FormBuilder object and you therefore don't need to create a new Object. By attempting to use new, it is trying to create a new DefaultController and access a function that is private to the internals of the Controller (or something like that - don't sue me for correctness on this one as it is just an attempt to explain why using new $this is wrong.)

Your solution is to remove the new in $this->createFormBuilder():

$form = $this->createFormBuilder($cvBase);