public ActionResult New()
        {
            var viewModel = new DepartmentsFormViewModel
            {
                Faculties = _context.Faculties.ToList()
            };

            return(View("DepartmentForm", viewModel));
        }
        public ActionResult Edit(int id)
        {
            var faculties      = _context.Faculties.ToList();
            var departmentInDb = _context.Departments.Single(d => d.Id == id);

            var viewModel = new DepartmentsFormViewModel(departmentInDb);

            viewModel.Faculties = faculties;

            return(View("DepartmentForm", viewModel));
        }