MissingControllerException for DController in CakePHP 5.2 and HTTP 500 After Custom ErrorHandler

Need Help
1

Hello CakePHP Community,

I’m working with CakePHP 5.2 and encountering issues with my custom DController. I’ve defined routes in config/routes.php for URLs like /d/:dimensionSlug and /d/:dimensionSlug/sd/:subdimensionSlug. However, when accessing /d/, I receive the following error:

MissingControllerException: Controller class `d` could not be found.
  • this is my DController.php (src/Controller/DController.php):
<?php
namespace App\Controller;

use App\Controller\AppController;
use Cake\Http\Exception\NotFoundException;

class DController extends AppController
{
    public function index($dimensionSlug = null)
    {
        if (!$dimensionSlug) {
            throw new NotFoundException(__('Dimension not specified.'));
        }

        return $this->redirect([
            'controller' => 'Pages',
            'action' => 'dimension',
            $dimensionSlug
        ]);
    }

    public function sd($dimensionSlug = null, $subdimensionSlug = null)
    {
        if ($dimensionSlug && $subdimensionSlug) {
            return $this->redirect([
                'controller' => 'Pages',
                'action' => 'dimension',
                $dimensionSlug,
                $subdimensionSlug
            ]);
        }

        throw new NotFoundException(__('Subdimension not specified.'));
    }
}
  • This are my Routes Configuration (config/routes.php): :
$builder->connect('/d', ['controller' => 'D', 'action' => 'index']);

$builder->connect(
    '/d/:dimensionSlug/sd/:subdimensionSlug',
    ['controller' => 'D', 'action' => 'sd'],
    [
        'pass' => ['dimensionSlug', 'subdimensionSlug'],
        'dimensionSlug'    => '[^/]+',
        'subdimensionSlug' => '[^/]+'
    ]
);

$builder->connect(
    '/d/:dimensionSlug',
    ['controller' => 'D', 'action' => 'index'],
    [
        'pass' => ['dimensionSlug'],
        'dimensionSlug' => '[^/]+'
    ]
);
  • Error Log Excerpt:
MissingControllerException: Controller class `d` could not be found.
  • Steps I’ve Taken:
  • Verified that DController.php is correctly named (uppercase “D”) and located in src/Controller/.
  • Defined specific routes before general ones in routes.php.
  • Ran composer dump-autoload and cleared CakePHP’s cache.

Any guidance or suggestions would be greatly appreciated!

Thank you!

2

CakePHP 5.2 has not been released yet, the latest release is 5.1.2

So either you are running the 5.next branch or you have a typo in your provided version :wink:

Anyway, can you try and open up the DebugKit Routes tab? It should show you which route was matched for your given URL as a highlighted section.

With that you can at least make sure, that the correct Route has matched.

3

Not sure if Cake routing treats /d and /d/ as different things, but that would be my first guess.