Plugin ErrorController not called when inside prefix routing

[ishanvyas22]

Description

Current behavior

We want to render specific template when error is thrown from the plugin. For that we have ErrorController inside main plugin namespace(let's call it Company\Plugin\Controller), so it would be Company\Plugin1\Controller\ErrorController.

Now when we throw exception from prefix route's controller i.e. Company\Plugin\Controller\Prefix1\FooController or Company\Plugin\Controller\Prefix2\BarController, it doesn't take plugin's Company\Plugin1\Controller\ErrorController into account. But, it calls core's controller(App\Controller\ErrorController).

Upon digging into ControllerFactory, it tries to find Company\Plugin\Controller\Prefix1\ErrorController.

// inside Cake\Controller\ControllerFactory
public function getControllerClass(ServerRequest $request): ?string
{
    ...

    // here in $namespace: Controller/Prefix1 (or Controller/Prefix2)
    return App::className($pluginPath . $controller, $namespace, 'Controller');
}

Expected behavior

Plugin's ErrorController(Company\Plugin1\Controller\ErrorController in our example) should be called.

CakePHP Version

4.3.11

PHP Version

No response

[markstory]

There isn't currently support for a controller cascade from routing prefixes to the plugin. We could rework the logic in WebExceptionRenderer to attempt the plugin (without prefix) error controller if the current route information includes a prefix.

Moving to a feature as the behavior you're describing does not currently exist. As a workaround you could add a subclass of your plugin error controller to each routing prefix.