maybe you forgot to register the controller as a service or missed tagging it with the "controller.service_arguments

Question

i created a Service to reading data from the Datebase, in order to achieve that, i want to make a Controller and throw this controller i want to call first the ReadingData Service. however get the Bug : Could not resolve argument $ReadingDatan of "TryPlugin\Storefront\Controller\PageController::showexample()", maybe you forgot to register the controller as a service or missed tagging it with the "controller.service_arguments"?

my codes :

ReadingData.php

<?php declare(strict_types=1);

namespace TryPlugin\Service;

use Shopware\Core\Framework\DataAbstractionLayer\EntityRepositoryInterface;
use Shopware\Core\Framework\Context;
use Shopware\Core\Framework\DataAbstractionLayer\Search\Criteria;


class ReadingData
{
    private EntityRepositoryInterface $productRepository;

    public function __construct(EntityRepositoryInterface $productRepository)
    {
        $this->productRepository = $productRepository;
    }

    public function readData(Context $context): void
    {
        $products = $this->productRepository->search(new Criteria(), $context);
    }

    /*    public function readData(Context $context): void
        {
            $product = $this->productRepository->search(new Criteria([$myId]), $context)->first();
        }*/


}

PageController.php

<?php declare(strict_types=1);

namespace TryPlugin\Storefront\Controller;

use DateTime;
use DateTimeInterface;
use Shopware\Core\Framework\DataAbstractionLayer\EntityRepositoryInterface;
use Shopware\Core\Framework\Routing\Annotation\LoginRequired;
use Shopware\Core\Framework\Routing\Annotation\RouteScope;
use Shopware\Core\System\SalesChannel\SalesChannelContext;
use Shopware\Storefront\Controller\StorefrontController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\JsonResponse;
use TryPlugin\Service\ReadingData;


/**
 * @RouteScope (scopes={"storefront"})
 */
class PageController extends StorefrontController
{
 
    /**
     * @Route("/examples", name="examples", methods={"GET"})
     */


    public function showExample(ReadingData $ReadingDatan): Response
    {
        $meinData = $ReadingDatan->readData();

        return new Response($meinData);
 
    }
}

Service.xml:

<service id="TryPlugin\Storefront\Controller\PageController" public="true">
    <call method="setContainer">
        <argument type="service" id="service_container"/>

    </call>
</service>

<!--ReadingDate From Controller-->
<service id="TryPlugin\Storefront\Controller\ProductController" public="true">
    <argument type="service" id="product.repository"/>
    <call method="setContainer">
        <argument type="service" id="service_container"/>
    </call>
</service>

Answer 1

When you want to use autowire just add the tag how the error says

<service id="TryPlugin\Storefront\Controller\PageController" public="true">
    <call method="setContainer">
        <argument type="service" id="service_container"/>

    </call>
    <tag name="controller.service_arguments"/>
</service>

<service id="TryPlugin\Storefront\Controller\ProductController" public="true">
    <argument type="service" id="product.repository"/>
    <call method="setContainer">
        <argument type="service" id="service_container"/>
    </call>
    <tag name="controller.service_arguments"/>
</service>