CODEWITHSUNDEEP
phpnamespaces
peace_love
peace_love

Reputation: 6471

How can I find out which use statement I need to add in Symfony 4?

I created a Controller and named the class DataTableController. But now I get an error message

InvalidArgumentException

Cannot determine controller argument for "App\Controller\DataTableController::usersAction()": the $request argument is type-hinted with the non-existent class or interface: "App\Controller\Request". Did you forget to add a use statement?

How do I find out what kind of use statement I need to add?

<?php

namespace App\Controller;

use DataTables\DataTablesInterface;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\Routing\Annotation\Route;

/**
*
* @Route("/users", name="users")
*
* @param Request $request
* @param DataTablesInterface $datatables
* @return JsonResponse
*/

class DataTableController extends Controller
{

  const ID = 'users';

  public function usersAction(Request $request, DataTablesInterface $datatables): JsonResponse
  {
    try {
      // Tell the DataTables service to process the request,
      // specifying ID of the required handler.
      $results = $datatables->handle($request, 'users');

      return $this->json($results);
    }
    catch (HttpException $e) {
      // In fact the line below returns 400 HTTP status code.
      // The message contains the error description.
      return $this->json($e->getMessage(), $e->getStatusCode());
    }
  }

}

Upvotes: 1

Views: 9626

Answers (2)

Mirha Masala
Mirha Masala

Reputation: 383

I was able to find it by running:

php ./bin/console debug:autowiring

In addition, you can run the same command but with a --show-private flag:

php ./bin/console debug:container --show-private

I hope this helps.

Upvotes: 4

G1.3
G1.3

Reputation: 1879

An use is missing:

use Symfony\Component\HttpFoundation\Request;

JsonResponse, HttpException mays be missing too. Use your IDE autocomplete to import these classes

Upvotes: 3

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