php - Laravel 4: Updating table Joins with form model binding -

i once did eager loading query , worked. using model binding i'm trying update 2 tables @ once no lucky. no error thrown, validations fine , when tried var_dump see values after validation , there. can't way update 2 tables in database using eloquent @ time. please help.

here did far:

profilescontroller.php

public function update($username) {     $user = $this->getuserbyusername($username);      $input = input::all();  try {     $this->profileform->validate($input);      // dd($input);      $user->profile->update($input);        } catch (formvalidationexception $e) {         return redirect::back()->withinput()->witherrors($e->geterrors())->with('form_error', 'sorry, can not update profile. try again!');     }      return redirect::route('profile.edit', $user->username)->with('form-success', 'profile has been updated!'); }   public function getuserbyusername($username) {     return user::with('profile')->whereusername($username)->firstorfail(); } 

other files can found here: http://laravel.io/bin/8ejk5