symfony4中的軟件包注入

Question

問題是我通過名為carbon的作曲家安裝了一個程序包，並將其用作控制器構造函數中的依賴項注入，當我運行項目時，它向我顯示：

Invalid service "Carbon\Carbon": method "__construct()" has no argument named "$carbon". Check your service definition.

這是我的控制器：

class IndexController extends AbstractController
{
    private $carbon;

    public function __construct(Carbon $carbon)
    {
        $this->carbon = $carbon;
    }

}

這是我的services.yml，它定義了carbon類，然后將其用作參數：

services:
    _defaults:
        autowire: true      # Automatically injects dependencies in your services.
        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
        public: false        # Allows optimizing the container by removing unused services; this also means
    App\:
        resource: '../src/*'
        exclude: '../src/{DependencyInjection,Entity,Migrations,Tests,Kernel.php}'

    Carbon\Carbon:
        $carbon: 'Carbon/Carbon'
    App\Controller\:
        resource: '../src/Controller'
        tags: ['controller.service_arguments']
        arguments: ['@Carbon\Carbon']

解決這個問題的最好方法是什么！

Answer 1

從您的services.yml中刪除此行

$carbon: 'Carbon/Carbon'