public function postCreate()
 {
     $validator = Validator::make(Input::all(), Product::$rules);
     if ($validator->passes()) {
         $product = new Product();
         $product->category_id = Input::get('category_id');
         $product->title = Input::get('title');
         $product->description = Input::get('description');
         $product->price = Input::get('price');
         $image = Input::file('image');
         $filename = date('Y-m-d-H-i-s') . "-" . $image->getClientOriginalName();
         $path = public_path('img/products/' . $filename);
         //file name pada windwos tidak boleh menggunakan ':' di tutorial pake ':', alamat ditambahkan public_path
         Image::make($image->getRealPath())->resize(468, 249)->save($path);
         $product->image = 'img/products/' . $filename;
         $product->save();
         return Redirect::to('admin/products/index')->with('message', 'Product Created');
     }
     return Redirect::to('admin/products/index')->with('message', 'Something went wrong')->withErrors($validator)->withInput();
 }