如何解决 symfony 5.3.10 中的自动装配问题？

Question

正如您在下面的代码中看到的，当我试图删除我的类别时。它给我以下错误：

无法自动装配“App\Controller\AdminController::deleteCategory()”的参数 $category：它引用 class“App\Entity\Category”但不存在此类服务。

这是我在AdminController.php中创建的函数代码：

<?php

命名空间App\Controller；

使用App\Utils\CategoryTreeAdminList;

使用Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

使用Symfony\Component\HttpFoundation\Response;

使用Symfony\Component\Routing\Annotation\Route;

使用App\Entity\Category;

#[路由('/admin')]

class AdminController 扩展了 AbstractController {

#[Route('/delete-category/{id}', name: 'delete_category')]

public function deleteCategory(Category $category): Response
{
    $entityManager = $this->getDoctrine()->getManager();
    $entityManager->remove($category);
    $entityManager->flush();
    return $this->redirectToRoute('categories');
}

}

以下是我提到 categoryList 的代码：

<?php

命名空间App\Utils；

使用 App\Utils\AbstractClasses\CategoryTreeAbstract;

class CategoryTreeAdminList 扩展了 CategoryTreeAbstract {

public $html_1 = '<ul class="fa-ul text-left">';
public $html_2 = '<li><i class="fa-li fa fa-arrow-right"></i>  ';
public $html_3 = '<a href="';
public $html_4 = '">';
public $html_5 = '</a> <a onclick="return confirm(\'Are you sure?\');" href="';
public $html_6 = '">';
public $html_7 = '</a>';
public $html_8 = '</li>';
public $html_9 = '</ul>';


public function getCategoryList(array $categories_array)
{
    $this->categorylist .= $this->html_1;
    foreach ($categories_array as $value) {
        $url_edit = $this->urlgenerator->generate('edit_category', ['id' => $value['id']]);

        $url_delete = $this->urlgenerator->generate('delete_category', ['id' => $value['id']]);
        $this->categorylist .= $this->html_2 . $value['name'] . 
        $this->html_3 . $url_edit . $this->html_4 . ' Edit' . 
        $this->html_5 . $url_delete . $this->html_6 . 'Delete' . 
        $this->html_7;

        if (!empty($value['children'])) {
            $this->getCategoryList($value['children']);
        }

        $this->categorylist .= $this->html_8;
    }

    $this->categorylist .= $this->html_9;

    return $this->categorylist;
}

}

Answer 1

@saddam 继续使用这段代码......你可以用这个解决你的错误，如果它解决了请告诉我。

#[Route('/delete-category/{id}', name: 'delete_category')]

public function deleteCategory($id): Response

{
$entityManager = $this->getDoctrine()->getManager();
$category = $entityManager->getRepository(Category::class)->find($id);
$entityManager->remove($category);
$entityManager->flush();
return $this->redirectToRoute('categories');

}

谢谢。

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