/**
  * Display the specified resource.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function mail_invoice($student_id, $fee_schedule_code)
 {
     $table = 'fee_sch_' . session()->get('current_session') . '_' . session()->get('current_term');
     $data['fee_elements'] = DB::table($table)->where('fee_schedule_code', $fee_schedule_code)->get();
     $data['fee_schedule'] = DB::table($table)->where('fee_schedule_code', $fee_schedule_code)->first();
     $data['invoice'] = \DB::table('invoices_' . \Session::get('current_session') . '_' . \Session::get('current_term'))->where(['student_id' => $student_id, 'fee_schedule_code' => $fee_schedule_code])->first();
     // dd($data['fee_schedule']);
     $student = Student::findOrFail($student_id);
     $data['student'] = $student;
     $data['school'] = School::findOrFail(1);
     //get this students parent
     $data['parent_email'] = $data['student']->studentParent->email;
     $send_mail = Helper::sendStudentInvoice($data, $student);
     // dd($send_mail);
     return redirect()->back();
 }