ASP.NET MVC - 我应该使用存储库模式将 ViewModel 写入数据库还是首先将它们转换为模型

// ViewModel
public class UserViewModel
{
    public string Name { get; set; }
    public int Age { get; set; }
}
// Model
public class UserModel
{
    public string Name { get; set; }
    public int Age { get; set; }
}
// Repository
public class UserRepository
{
    private readonly DbContext _context;
    public UserRepository(DbContext context)
    {
        _context = context;
    }
    public void AddUser(UserViewModel viewModel)
    {
        var userModel = new UserModel()
        {
            Name = viewModel.Name,
            Age = viewModel.Age
        };
        _context.Set<UserModel>().Add(userModel);
        _context.SaveChanges();
    }
}
// Controller
public class UserController : Controller
{
    private readonly UserRepository _userRepository;
    public UserController(UserRepository userRepository)
    {
        _userRepository = userRepository;
    }
    [HttpPost]
    public IActionResult AddUser(UserViewModel viewModel)
    {
        if (ModelState.IsValid)
        {
            _userRepository.AddUser(viewModel);
            return RedirectToAction("Index");
        }
        return View(viewModel);
    }
}