function postUpdate($id)
 {
     $validator = \App\Movie::runValidator(\Input::all());
     if ($validator->fails()) {
         return \Redirect::back()->withErrors($validator)->withInput();
     }
     $movie = \App\Movie::findOrFail($id);
     $movie->title = \Input::get('title');
     $movie->genre = \Input::get('genre');
     $movie->rating = \Input::get('rating');
     $movie->save();
     return \Redirect::to('movies');
 }