c# - 如何使用自动映射器跳过对象

Question

我有以下数据模型:

class TicketDM
{
 public int Id{get;set;}
 public List<NoteContractDM> Notes{get;set;}
}

class NoteContractDM
{
 public NoteDM Note{get;set;}
}

class NoteDM{
 public string Subject{get;set;}
 public string Description{get;set}
}

以及以下 ViewModel:

public class TicketVM
{
 public int Id {get;set;
 public List<NoteVM> Notes{get;set;}
}

public NoteVM
{
 public string Subject{get;set;}
 public string Description{get;set;}
} 

我想做一些自动映射，为此我必须跳过 noteContractDM。以下显然不起作用:

Mapper.CreateMap<TicketDM, TicketVM>()

我试过这样的:

Mapper.CreateMap<TicketDM, TicketVM>()
  .ForMember(vm => vm.Notes, conf => conf.MapFrom(dm => dm.Notes));  

但它总是给我 Missing type map configuration or unsupported mapping.异常。

Answer 1

如果您想跳过对象，您可以告诉 Automapper 忽略它们:

Mapper.CreateMap<TicketDM, TicketVM>()
.ForMember(vm => vm.Notes, conf => conf.Ignore());  

但根据您给出的示例，您可能想要创建另一个 map ，以便 Notes 也可以自动映射:

Mapper.CreateMap<TicketDM, TicketVM>()
.ForMember(vm => vm.Notes, conf => conf.MapFrom(dm => dm.Notes.Select(x => x.Note)));

Mapper.CreateMap<NoteDM, NoteVM>();

(示例使用 System.Linq)