/**
  * View loan information and extensions for a certain loan.
  *
  * @param  int $id
  *
  * @return \Illuminate\View\View
  */
 public function view($id)
 {
     $loan = Loan::with('historyRecords')->findOrFail($id);
     $loan->historyRecords->each(function ($history) use($loan) {
         $history->start_date = $loan->start_date;
         $history->amount = $loan->amount;
         $history->history_record_id = $history->id;
     });
     return view('view', ['loan' => $loan->toJson()]);
 }