public ActionResult AddStudentToClass(int classId, int studentId)
{
GetHelper <Class> .Add(Globals.CLASSES_ADD_API_LINK, classId, studentId);
var className = GetHelper <Class> .GetById(Globals.CLASSES_API_LINK, classId).name;
Student student = GetHelper <Student> .GetById(Globals.STUDENTS_API_LINK, studentId);
var studentName = student.forename + " " + student.surname;
TempData["message"] = "Pomyślnie dodano studenta " + studentName + " do klasy " + className;
return(RedirectToAction("Index"));
}