public function createStudentRegister(Request $request)
 {
     $validator = Validator::make($request->get('StudentRegister'), StudentRegister::$rules);
     if ($validator->fails()) {
         return redirect()->back()->withErrors($validator->errors());
     } else {
         $arrSubjects = $request->input('StudentRegister.subjects');
         // $request->input('arrSubjects');
         $arrTeachTime = $request->input('StudentRegister.teachTimes');
         // $request->input('arrTeachTime');
         if (empty($arrSubjects) || empty($arrTeachTime)) {
             return redirect()->back()->withErrors("vui lòng chọn môn học, thời gian học.");
         }
         $studentRegister = new StudentRegister();
         $studentRegister->name = $request->input('StudentRegister.name');
         $studentRegister->email = $request->input('StudentRegister.email');
         $studentRegister->mobile = $request->input('StudentRegister.mobile');
         $studentRegister->sex = $request->input('StudentRegister.sex');
         $studentRegister->district_id = $request->input('StudentRegister.district_id');
         $studentRegister->address = $request->input('StudentRegister.address');
         $studentRegister->class = $request->input('StudentRegister.class');
         $studentRegister->level = $request->input('StudentRegister.level');
         $studentRegister->school = $request->input('StudentRegister.company');
         $studentRegister->cost = $request->input('StudentRegister.cost');
         $studentRegister->other_require = $request->input('StudentRegister.other_require');
         $studentRegister->save();
         $studentRegister->subjects()->sync($arrSubjects);
         $studentRegister->teachTimes()->sync($arrTeachTime);
         return redirect(route('studentRegister'))->with('register-status', 'Đăng ký tìm gia sư thành công. Chúng tôi sẽ phản hồi quý khách trong thời gian sớm nhất. Xin cảm ơn!');
     }
 }
 /**
  * Show the form for editing the specified resource.
  *
  * @param  int  $id
  * @return \Illuminate\Http\Response
  */
 public function edit($id)
 {
     $student = StudentRegister::findOrFail($id);
     return view('admin.students.edit', ['student' => $student]);
 }