AutoMapper：域模型和视图模型之间的双向深度映射

我需要在平面ViewModel和深度结构化Domain模型之间映射两种方式。这将是我们解决方案中的常见情况。

我的模型是：

public class Client 
{
   ...
   public NotificationSettings NotificationSettings { get; set; }
   public ContactDetails ContactDetails { get; set; }
   ...
}

public class NotificationSettings
{
    ...
    public bool ReceiveActivityEmails { get; set; }
    public bool ReceiveActivitySms { get; set; }
    ...
}

public class ContactDetails
{
    ...
    public string Email { get; set }
    public string MobileNumber { get; set; }
    ...
}

public class ClientNotificationOptionsViewModel
{
    public string Email { get; set }
    public string MobileNumber { get; set; }
    public bool ReceiveActivityEmails { get; set; }
    public bool ReceiveActivitySms { get; set; }
}

映射代码：

Mapper.CreateMap<Client, ClientNotificationOptionsViewModel>()
    .ForMember(x => x.ReceiveActivityEmails, opt => opt.MapFrom(x => x.NotificationSettings.ReceiveActivityEmails))
    .ForMember(x => x.ReceiveActivitySms, opt => opt.MapFrom(x => x.NotificationSettings.ReceiveActivitySms))
    .ForMember(x => x.Email, opt => opt.MapFrom(x => x.ContactDetails.Email))
    .ForMember(x => x.MobileNumber, opt => opt.MapFrom(x => x.ContactDetails.MobileNumber));

// Have to use AfterMap because ForMember(x => x.NotificationSettings.ReceiveActivityEmail) generates "expression must resolve to top-level member" error
Mapper.CreateMap<ClientNotificationOptionsViewModel, Client>()
    .IgnoreUnmapped()
    .AfterMap((from, to) =>
    {
        to.NotificationSettings.ReceiveActivityEmail = from.ReceiveActivityEmail;
        to.NotificationSettings.ReceiveActivitySms = from.ReceiveActivitySms;
        to.ContactDetails.Email = from.Email;
        to.ContactDetails.MobileNumber = from.MobileNumber;
    });


...

// Hack as ForAllMembers() returns void instead of fluent API syntax
public static IMappingExpression<TSource, TDest> IgnoreUnmapped<TSource, TDest>(this IMappingExpression<TSource, TDest> expression)
{
    expression.ForAllMembers(opt => opt.Ignore());
    return expression;
}

我不喜欢它是因为：

1）麻烦

2）第二个映射几乎取消了Automapper的功能并手动实现了工作-唯一的优势是在整个代码中引用Automapper的一致性

谁能建议：

a）将自动映射器用于深层属性的更好方法？

b）像这样执行双向映射的更好方法？

c）关于在这种情况下是否应该使用Automapper的建议？是否有令人信服的理由不选择手动编码的更简单方法？例如。：

void MapManually(Client client, ClientNotificationOptionsViewModel viewModel)
{
    viewModel.Email = client.ContactDetails.Email;
    // etc
}  

void MapManually(ClientNotificationOptionsViewModel viewModel, Client client)
{
    client.ContactDetails.Email = viewModel.Email;
    // etc
}

-布伦丹

PS重组域模型不是解决方案。

PPS可以通过扩展方法和一些时髦的反射来清理上面的代码来设置深层属性...但是我宁愿使用automapper功能。