Question

我有类似下面的CategoriesController.php

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)
    );
}

像CategoriesControllel这样的类我有很多，所以我认为它应该在一个DefaultController中，而不是重复代码。如果我将我的代码移动到DefaultController，如下所示：

<?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;
}
}

在CategoriesController中：

<?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)
    );
}

之后我的申请被打破了。

( ! ) 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中留下空构造函数时，它没有以私有变量的形式找到任何服务。我该如何解决？

Answer 1

我认为问题在于您尚未在services.yml中将控制器注册为服务。如果您不这样做，Symfony会将其视为常规控制器，并尝试使用默认参数对其进行实例化，从而导致您在错误消息中看到不匹配。

检查the docs，了解如何将控制器定义为服务。

扩展__construct无法正常工作

1 个答案: