Laravel 5.4: How to DO NOT use route parameter in controller

Question

I am developing a Multilingual application and trying to make a middleware to pass route {locale} prefix to URL. But now I do not need to use this {locale} parameter in controller, for example:

public function getPost(App\Post $post)
{
    return view('welcome')->withPost($post);
}

But the code above does not work unless I change the App\Post $post to $locale, App\Post $post.

The problem is because I'll need to pass the $locale parameter whenever I create a new controller. That is not cool.

How to avoid passing $locale parameter to all controllers? I do not need it because I already used it on my middleware.

UPDATE:

routes\web.php

Route::prefix('{locale}')->middleware('locale')->group(function () {     

    Route::get('/', 'PageController@getHome')->name('welcome');
    Auth::routes();
    Route::get('/home', 'HomeController@index')->name('home');

    ...

    // This route must be the last!
    Route::get('/{post}', 'PageController@getPost')->name('post');
});

Answer 1

There is a forgetParameter()-method in Laravel's route class, that can remove a parameter from being parsed to controller methods.

It can be used e.g. in a middleware, by calling it like so:

$request->route()->forgetParameter('locale');

Then the parameter will be removed from the controller dispatcher's parameter property and thereby not get parsed on to the controller methods as parameter.