我有例如CategoriesController.php这样下面扩展__construct不工作
class CategoriesController
{
/**
* Translator object.
*
* @var Translator $translator
*/
private $translator;
/**
* Template engine.
*
* @var EngineInterface $templating
*/
private $templating;
/**
* Session object.
*
* @var Session $session
*/
private $session;
/**
* Routing object.
*
* @var RouterInterface $router
*/
private $router;
/**
* Model object.
*
* @var ObjectRepository $model
*/
private $model;
/**
* Form factory.
*
* @var FormFactory $formFactory
*/
private $formFactory;
/**
* CategoriesController constructor.
*
* @param Translator $translator Translator
* @param EngineInterface $templating Templating engine
* @param Session $session Session
* @param RouterInterface $router
* @param ObjectRepository $model Model object
* @param FormFactory $formFactory Form factory
*/
public function __construct(
Translator $translator,
EngineInterface $templating,
Session $session,
RouterInterface $router,
ObjectRepository $model,
FormFactory $formFactory
) {
$this->translator = $translator;
$this->templating = $templating;
$this->session = $session;
$this->router = $router;
$this->model = $model;
$this->formFactory = $formFactory;
}
/**
* Index action.
*
* @return Response A Response instance
*/
public function indexAction()
{
$categories = $this->model->findAll();
return $this->templating->renderResponse(
'AppBundle:Categories:index.html.twig',
array('categories' => $categories)
);
}
类,如CategoriesControllel我有很多,所以我觉得它的一部分应该是一个DefaultController,不重复的代码。如果我在我的代码移到DefaultController这样的:
<?php
/**
* Default controller class.
*/
namespace AppBundle\Controller;
/**
* Class DefaultController.
*/
class DefaultController
{
/**
* Translator object.
*
* @var Translator $translator
*/
private $translator;
/**
* Template engine.
*
* @var EngineInterface $templating
*/
private $templating;
/**
* Session object.
*
* @var Session $session
*/
private $session;
/**
* Routing object.
*
* @var RouterInterface $router
*/
private $router;
/**
* Model object.
*
* @var ObjectRepository $model
*/
private $model;
/**
* Form factory.
*
* @var FormFactory $formFactory
*/
private $formFactory;
/**
* CategoriesController constructor.
*
* @param Translator $translator Translator
* @param EngineInterface $templating Templating engine
* @param Session $session Session
* @param RouterInterface $router
* @param ObjectRepository $model Model object
* @param FormFactory $formFactory Form factory
*/
public function __construct(
Translator $translator,
EngineInterface $templating,
Session $session,
RouterInterface $router,
ObjectRepository $model,
FormFactory $formFactory
) {
$this->translator = $translator;
$this->templating = $templating;
$this->session = $session;
$this->router = $router;
$this->model = $model;
$this->formFactory = $formFactory;
}
}
,并在CategoriesController:
<?php
/**
* Categories controller class.
*/
namespace AppBundle\Controller;
class CategoriesController extends DefaultController
{
/**
* Index action.
*
* @return Response A Response instance
*/
public function indexAction()
{
$categories = $this->model->findAllWithAds();
if (!$categories) {
throw new NotFoundHttpException(
$this->translator->trans('categories.messages.categories_not_found')
);
}
return $this->templating->renderResponse(
'AppBundle:Categories:index.html.twig',
array('categories' => $categories)
);
}
它之后我的应用程序被打破了。
(!) Catchable fatal error: Argument 1 passed to AppBundle\Controller\DefaultController::__construct() must be an instance of AppBundle\Controller\Translator, instance of...
当我在CategoriesController中留下空的构造函数时,它没有找到私有变量形式的任何服务。 我该如何解决它?
首先,如果子类需要访问父类中的属性(如'$ this-> model'和'$ this-> translator'),则需要将其设置为'protected'(可访问父母和孩子)。如果它们被设置为“private”,则只有父类可以访问它们。其次,它看起来(通过我可以看到的错误消息的一部分),你注入错误的参数给构造函数? –
你如何实例化控制器? – topher
......以及@mickadoo在他的回答中说了些什么。您可能需要在服务容器中注册所有控制器(DefaultController的子项,如CategoriesController)。不是父母(DefaultController)。 –