Laravel route /users/id or /users/username to return users.show

Question

I would like to be able to accept either a 40-character string ID /users/{id} or the user's username /users/{username} and then return the users.show view.

1. Is this possible?
2. Where would the checks go?

Answer 1

I have found another solution to this. I don't know which is better though. Hopefully the community can vote...

Within my UsersController.php I have:

public function show($id_or_username)
    {
        $user = User::where('id' , '=', $id_or_username)->orWhere('username', $id_or_username)->firstOrFail();
        return View::make('users.show', compact('user'));
    }