Validation errors not sent using redirect withInput()

Question

I'm trying to send my validation errors to another method by using redirect

public function save()
    {

        //validasi input
        if (!$this->validate([
            'judul' => 'required|is_unique[komik.judul]'
        ])) {
            return redirect()->to('/komik/create')->withInput();
        }

this is the create() method

public function create()
    {
        session();
        $data = [
            'title' => 'Form Tambah Data Komik',
            'validation' => \Config\Services::validation()

        ];

        return view('komik/create', $data);
    }

This is a snippet of my create.php view form where I'm trying to validate

<form action="/komik/save" method="post" enctype="multipart/form-data">

                <?php d($validation) ?>
                <?= $validation->listErrors();; ?>

this is the form

The problem is that the validation errors in save() is not sent to the create() method. But the validation errors exist in the save() method which I can prove by adding $validation = \Config\Services::validation(); dd($validation); in save(). This is what happens when I click "Tambah Data" button after I add the code

as you can see there is a validation error, it's just not sent to the create() method

I tried using return view(), this works but it creates another problem. I would like to use return redirect() instead.

This is my routes

$routes->get('/', 'Pages::index');
$routes->get('/komik/create', 'Komik::create');
$routes->get('/komik/edit/(:segment)', 'Komik::edit/$1');
$routes->post('/komik/save', 'Komik::save');
$routes->delete('/komik/(:num)', 'Komik::delete/$1');
$routes->get('/komik/(:any)', 'Komik::detail/$1');

What can I do to solve this problem? Thanks

Answer 1

I found the solution, apparently there's a bug with redirect()->withInput() in CI. You need to use validation_errors(), validation_list_errors() and validation_show_error() to display validation error. Also you don't need to write $validation = \Config\Services::validation();. Read https://codeigniter4.github.io/CodeIgniter4/installation/upgrade_430.html#redirect-withinput-and-validation-errors