我一直在阅读Symfony2文档中的内部章节,它说如果我在kernel.controller事件中添加一个监听器,我可以交换运行的控制器,我的东西有点像这样:
public function onKernelController(FilterControllerEvent $event)
{
$controller = $event->getController();
$replacementControllerName = .... //Some logic to work out the name of the new controller
$replacementController = ?? //Not sure what goes here
$event->setController($replacementController);
}
我不确定是否一旦我找到了替换控制器的名称,我如何得到一个可以传递给setController的实例?
答案 0 :(得分:18)
您可以将控制器设置为任何可调用,这意味着类似
array('class', 'method')
array($instance, 'method')
function() { ... }
'function'
; __invoke()
方法new MyClassImplementingInvoke()
'class::method'
强制ControllerResolver
创建class
的新实例(不带任何参数调用构造函数)并返回可调用array($instanceOfClass, 'method')
修改强>
我抬起了错误的ControllerResolver
。在标准设置中运行Symfony时,它将使用Symfony\Bundle\FrameworkBundle\Controller\ControllerResolver
(而不是Symfony\Component\HttpKernel\Controller\ControllerResolver
)。所以控制器名称的处理方式与我上面写的略有不同。
以下示例总结了设置控制器时的所有可能选项。
public function onKernelController(FilterControllerEvent $event)
{
$controller = $event->getController();
// call method in Controller class in YourBundle
$replacementController = 'YourBundle:Controller:method';
// call method in service (which is a service registered in the DIC)
$replacementController = 'service:method';
// call method on an instance of Class (created by calling the constructor without any argument)
$replacementController = 'Class::method';
// call method on Class statically (static method)
$replacementController = array('Class', 'method');
// call method on $controller
$controller = new YourController(1, 2, 3);
$replacementController = array($controller, 'method');
// call __invoke on $controller
$replacementController = new YourController(1, 2, 3);
$event->setController($replacementController);
}