Bug: a named route cannot be used with RedirectException

[kenjis]

PHP Version

8.1

CodeIgniter4 Version

4.3.6

CodeIgniter4 Installation Method

Git

Which operating systems have you tested for this bug?

macOS

Which server did you use?

cli-server (PHP built-in webserver)

Database

n/a

What happened?

throw new \CodeIgniter\Router\Exceptions\RedirectException($route);

$route may be a named route, relative URI, or a complete URL.
https://codeigniter4.github.io/CodeIgniter4/general/errors.html#redirectexception

but a named route does not work.

Steps to Reproduce

$routes->get('foo/bar', 'Foo::bar', ['as' => 'route-name']);

<?php

namespace App\Controllers;

use CodeIgniter\Router\Exceptions\RedirectException;

class Home extends BaseController
{
 public function index()
 {
 throw new RedirectException('route-name');
 }
}

Navigate to http://localhost:8080, you will be redirected to http://localhost:8080/route-name.

Expected Output

Redirected to http://localhost:8080/foo/bar

Anything else?

No response

[kenjis]

$route may be a named route, relative URI, or a complete URL.

This text is from the v4.0.2 user guide.

[kenjis]

base_url() does not take a route name, so the first parameter must be a relative URI, or complete URL.

CodeIgniter4/system/CodeIgniter.php

Lines 367 to 373 in 1e7204b

	} catch (RedirectException $e) {
	$logger = Services::logger();
	$logger->info('REDIRECTED ROUTE at ' . $e->getMessage());
	// If the route is a 'redirect' route, it throws
	// the exception with the $to as the message
	$this->response->redirect(base_url($e->getMessage()), 'auto', $e->getCode());

and I confirmed that a named route did not work since v4.0.0:

CodeIgniter4/system/CodeIgniter.php

Lines 308 to 315 in 47dbb16

	catch (RedirectException $e)
	{
	$logger = Services::logger();
	$logger->info('REDIRECTED ROUTE at ' . $e->getMessage());
	// If the route is a 'redirect' route, it throws
	// the exception with the $to as the message
	$this->response->redirect(base_url($e->getMessage()), 'auto', $e->getCode());

[kenjis]

base_url() does not take a route name, so the first parameter must be a relative URI, or complete URL.

No, base_url() also does not take a complete URL.

I sent another PR #7633