Add logic to redirect to different pages on login in Laravel 12 using the built-in auth?

You can bind your own implementation of Laravel\Fortify\Contracts\LoginResponse contract into the Service Container, e.g.

use Laravel\Fortify\Contracts\LoginResponse;
 
/**
 * Register any application services.
 */
public function register(): void
{
    $this->app->instance(LoginResponse::class, new class implements LoginResponse {
        public function toResponse($request)
        {
            // logic to determine URL where the $request->user() should be redirected
   
            return redirect($urlDeterminedAbove);
        }
    });
}

https://laravel.com/docs/12.x/fortify#customizing-authentication-redirects

I've updated my Providers\FortifyServiceProvider.php to:

<?php

namespace App\Providers;

use App\Actions\Fortify\CreateNewUser;
use App\Actions\Fortify\ResetUserPassword;
use Illuminate\Cache\RateLimiting\Limit;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Str;
use Inertia\Inertia;
use Laravel\Fortify\Contracts\LoginResponse;
use Laravel\Fortify\Features;
use Laravel\Fortify\Fortify;

class FortifyServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        $this->app->instance(LoginResponse::class, new class implements LoginResponse {
            public function toResponse($request)
            {
                $user = $request->user();

                if ($user && $user->characters()->count() > 0) {
                    return redirect('characters');
                }

                return redirect('characters/creator');
            }
        });
    }
...

However it still isn't working

edit: I've made some progress, now I get a modal popup that says "App\Http\Responses\LoginResponse"

My code: App\Http\Responses:

<?php

namespace App\Http\Responses;

use Laravel\Fortify\Contracts\LoginResponse as LoginResponseContract;

class LoginResponse implements LoginResponseContract
{
    /**
     * @param  $request
     * @return mixed
     */
    public function toResponse($request)
    {
        $user = auth()->user();

        if ($user && $user->characters()->count() > 0) {
            return redirect()->intended('/characters');
        }

        return redirect()->intended('/characters/creator');
    }
}

FortifyServiceProvider:

    public function register(): void
    {
        // https://laravel-news.com/override-login-redirects-in-jetstream-fortify
        $this->app->instance(LoginResponseContract::class, LoginResponse::class);
        $this->app->instance(TwoFactorLoginResponse::class, LoginResponse::class); // singleton
    }

edit 2: After some research, I figured out it IS redirecting to where I want, but it re-redirects to /dashboard after that?

Just put it here. I found out that if we didn't redirect to the route that return inertia response. It'll throw us to the default route.

Here is my setup

File: app/Providers/FortifyServiceProvider.php

use Laravel\Fortify\Contracts\LoginResponse as LoginResponseContract;
use App\Http\Responses\LoginResponse;

/**
     * Register any application services.
     */
    public function register(): void
    {
       // Register LoginResponse as a singleton to prevent any binding 
        $this->app->singleton(LoginResponseContract::class, LoginResponse::class);
    }

File: app/Http/Responses/LoginResponse.php

class LoginResponse implements LoginResponseContract
{
    public function toResponse($request)
    {
        $user = $request->user();

        if ($user->isCustomer()) return redirect()->route('customer.index');
        return edirect()->route('admin.index');
    }
}

File: app/Http/Controllers/CustomerController.php

public function index()
{
    return Inertia::render('customer/index');
}

and the route file.

Route::get('/admin, function () {
    // This controller or route must return as an Inertia response  
    return Inertia::render('admin/index');
})->name('admin.index');

Route::get('customer', [CustomerController::class, 'index'])->name('customer.index'); 

That's all, I hope it help.