/**
  * Update the specified resource in storage.
  *
  * @param  Request  $request
  * @param  int  $id
  * @return Response
  */
 public function update(Request $request, $id)
 {
     $this->validate($request, ['service_date' => 'required', 'regular_count' => 'required', 'visitor_count' => 'required']);
     //Store method is responsible for throwing data into database, and redirect to somewhere else
     $input = $request->all();
     Attendance::edit_attendance($input, $id);
     $attendance = Attendance::get_attendance($id);
     $congregation = Congregation::get_congregation($attendance->congregation_id);
     $staff = Staff::get_staff($attendance->staff_id);
     $message = 'Attendance for "' . $congregation->name . '" has been updated successfully.';
     return view('attendances.show', compact('attendance', 'message', 'congregation', 'staff'));
 }