/**
  * Store a newly created resource in storage.
  *
  * @param  \Illuminate\Http\Request  $request
  * @return \Illuminate\Http\Response
  */
 public function store(Request $request)
 {
     $_repository_detail = new _repository_detail();
     $_repository_detail->repository_id = Input::get('repository_id');
     $_repository_detail->book_id = Input::get('book_id');
     $_repository_detail->book_ammount = Input::get('book_ammount');
     if ($_repository_detail->save()) {
         return Redirect::to('repository_details');
     } else {
         return Redirect::back()->withInput()->withErrors('保存失败!');
     }
     //
 }