javascript - how to prevent data re entering on database on page refresh on laravel -


i have pos under development , noticed when reload page, re-enters data. how prevent data re entering on page reload?

my controller has code:

public function doaddsales(request $request)  {           $rules = [         'customer_name'=>'required|alpha',         'or_number'=>'required',         'payment'=>'required',     ];        $validator = validator::make($request->all(),$rules);      if ($validator->fails()) {         return back()->witherrors($validator);      } else {         foreach ($request->input('id_item') $id) {             $item_id[] = $id;          }          foreach ($request->input('i_name') $name) {             $i_name[] = $name;          }          foreach ($request->input('id_categ') $categ) {             $categ_id[] = $categ;          }          foreach ($request->input('quan') $quan) {             $quantity[] = $quan;          }          foreach ($request->input('tot') $total) {             $each_total[] = $total;          }          $last = sizeof($request->input('id_item'));                $i = 0;          while ($i < $last) {              $items = item::find($item_id[$i]);                    $sales = new sales;                 $sales->or = $request->input('or_number');             $sales->customer_name = $request->input('customer_name');             $sales->item_id = $item_id[$i];             $sales->item_name = $i_name[$i];             $sales->category_id = $categ_id[$i];             $sales->user_id = auth::user()->id;             $sales->qty = $quantity[$i];             $sales->total = $each_total[$i];             $sales->save();              db::table('items')->where('id',$item_id[$i])                 ->update(['qty'=> $items->qty - $quantity[$i]]);              return view ('show_sales')->with(array(                 'name'=>$request->input('customer_name'),                 'or_no'=>$request->input('or_number'),                           'total'=>$request->input('getitemprice'),                             'change'=>$request->input('change'),                 'orders'=>$i_name[$i],              ));             $i++;         }      } }

use redirect following.

suppose redirect route \view\list, can add following line @ end of function 

public function doaddsales(request $request){     ...     // code     ...     return redirect()->to('\view\list')->with('alert-success','records saved successfully'); }

note: redirect route must of get type.


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