Form Validation and Multi-Submit Prevention

Our form doesn't have validation, so let's add it in this lesson.

Back-End Validation

First, let's add the validation on the back-end. For this, we will use Form Request.

php artisan make:request StorePostRequest

app/Http/Requests/StorePostRequest.php:

class StorePostRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }
 
    public function rules(): array
    {
        return [
            'title'   => 'required|min:3',
            'content' => 'required',
        ];
    }
}

app/Http/Controllers/PostController.php:

use App\Http\Requests\StorePostRequest;
 
class PostController extends Controller
{
    // ...
 
    public function store(Request $request): RedirectResponse 
    public function store(StorePostRequest $request): RedirectResponse 
    {
        Post::create([ 
            'title' => $request->input('title'),
            'content' => $request->input('content'),
        ]); 
        Post::create($request->validated()); 
 
        return redirect()->route('posts.index');
    }
}

We don't need anything else on the back-end.

Showing Errors on the Front-End

For the front-end, there are a couple of...