How do I use validateWithBag90 in Laravel 9? I tried a lot of combinations and I'm getting a bit frustrated.

$validator = Validator::make($request->all(), [
    'old' => 'required',
    'new' => 'required|string|confirmed',
]);

if ($validator->fails()) {
    return redirect()->back()->with('error', $validator);
}

I'm getting this error.

Serialization of 'Closure' is not allowed

Any ideas?

CodePudding user response：

Manually Creating Validators

After determining whether the request validation failed, you may use the withErrors method to flash the error messages to the session. When using this method, the $errors variable will automatically be shared with your views after redirection, allowing you to easily display them back to the user. The withErrors method accepts a validator, a MessageBag, or a PHP array.

Instead of:

// ...
->with('error', $validator); ❌
// ...

Use this:

// ...
        if ($validator->fails()) {
            return redirect()
                        ->back()
                        ->withErrors($validator) ✅
                        ->withInput();
        }
// ...

Addendum

Displaying The Validation Errors

An $errors variable is shared with all of your application's views by the Illuminate\View\Middleware\ShareErrorsFromSession middleware, which is provided by the web middleware group. When this middleware is applied an $errors variable will always be available in your views, allowing you to conveniently assume the $errors variable is always defined and can be safely used. The $errors variable will be an instance of Illuminate\Support\MessageBag.

<!-- /resources/views/post/create.blade.php -->
 
<h1>Create Post</h1>
 
@if ($errors->any())
    <div >
        <ul>
            @foreach ($errors->all() as $error)
                <li>{{ $error }}</li>
            @endforeach
        </ul>
    </div>
@endif
 
<!-- Create Post Form -->