Question

您好我想在symFony2中添加一个表单并添加动态字段。所以我在控制器中编写了代码：

public function getDataAction(){
    $handler = new AnotherClass();
    $object = $handler->getForm($getAdditionalData);
}

和“AnotherClass”定义如下：

class AnotherClass extends  Controller implements requiredInterface{

public  function getForm($formData){
 //Here i want to write Logic to render a dynamic form with dynamic fields
    $form = $this->createFormBuilder($formData)
             ->setAction($this->generateUrl('me_route_go'))

        // Set form field of additional data
         foreach ($formData as $k => $v) {
             $form->add($k, 'text');
         }

         //Create form and submit button
         $form = $form->add('submit', 'submit')->add('Cancel', 'reset')->getForm();
         $form = $form->getForm();
     }
  }

 }

但是我在这里得到以下错误：

Error: Call to a member function get() on a non-object.

return $this->container->get('form.factory')->createBuilder($type, $data, $options);

请提出可能存在的问题。

提前感谢..

Answer 1

您的控制器AnotherClass需要依赖注入容器，因为您正在扩展基本Controller类，您必须在实例化它之后设置它：

public function getDataAction(){
    $handler = new AnotherClass();
    $handler->setContainer($this->container);
    $object = $handler->getForm($getAdditionalData);
}

您也可以将其创建为服务：

services.yml

name.of.your.service:
    class:     Path\To\AnotherClass
    calls:
        - [setContainer, [ "@service_container" ]]

然后：

public function getDataAction(){
    $handler = $this->get('name.of.your.service');
    $object = $handler->getForm($getAdditionalData);
}

在非对象Symfony2上调用成员函数get（）

1 个答案: