$request->route() returns null in laravel - php

Question

I have this code:
class TotersProviderLoginController extends Controller
{
private $oauthService;
public function __construct(Request $request)
{
$provider = $request->route()->parameter('provider'); // error here
if($provider == 'google')
$this->oauthService = new GoogleOauthService();
else
throw new \Exception('Provider '.($provider ?? '').' not supported!');
}
I have the following routes defined:
Route::get('login/toters/{provider}', 'Accounts\TotersProviderLoginController#redirectToProvider');
Route::get('login/toters/{provider}/redirect', 'Accounts\TotersProviderLoginController#handleProviderCallback');
Route::get('login/toters/{provider}/csrf', 'Accounts\TotersProviderLoginController#getCsrf');
Route::post('login/toters/{provider}/oauth', 'Accounts\TotersProviderLoginController#requestToken');
for some reason when I run
php artisan route:list --verbose
I get this error
In TotersProviderLoginController.php line 38:
[Symfony\Component\Debug\Exception\FatalThrowableError]
Call to a member function parameter() on null
so it's clear that $request->route() is returning null. Why is that?
note: I'm using Laravel 5.8

Answer 1

I have debug myself as you mentioned in the question and i found the way where you get the error.
When you run php artisan route:list --verbose command it will debug all routes and also call controller methods of every routes.
In your case what happens when you run command with verbose, route do not have provider default value and that's why it always gives null value.
While you call routes via postman or web it will definitely work, because at that time you have always some value for provider.
Thanks:)