我是否正确使用了自动映射器 2.0 的包含功能?



要么我没有,要么它不工作。。。我有一个Source类,我想将它映射到相互继承的多个视图。

基本上,基类是Detail,子类是Edit或Update,它们使用与Detail相同的所有数据,加上其他几个字段来管理自己的列表或其他什么。

以下是我正在使用的地图:

Mapper.CreateMap<Ticket, Detail>()
                .Include<Ticket, Update>()
                .Include<Ticket, Edit>()
                .ForMember(dest => dest.Priority, opt => opt.MapFrom(src => src.Priority.Code))
                .ForMember(dest => dest.TicketID, opt => opt.MapFrom(src => src.ID))
                .ForMember(dest => dest.Status, opt => opt.MapFrom(src => src.StatusCode))
                .ForMember(dest => dest.Category, opt => opt.MapFrom(src => src.ProblemCategoryCode))
                .ForMember(dest => dest.crmBusCode, opt => opt.MapFrom(src => src.Company.crmBusCode))
                .ForMember(dest => dest.TeamMembers, opt => opt.MapFrom(src => src.Schedules.Where(s => s.CompleteTime == null)));
            Mapper.CreateMap<Ticket, Update>()
                .ForMember(m => m.Schedules, opt => opt.MapFrom(t => t.Schedules.Where(s => s.EmployeeID == Util.CurrentUserID() && s.CompleteTime == null)));
            Mapper.CreateMap<Ticket, Edit>();

然后,如果I Mapper.Map(ticket)使用MapFrom的任何属性都没有得到评估,那么它们最终只会得到如果没有设置映射时会有的值。

那么这里出了什么问题?

如果您不想调用Mapper.Map两次,则作为替代解决方案。您可以将Detail的常见映射移动到一个扩展方法中:

public static class MappingExtensions
{
    public static IMappingExpression<Ticket, TDest> MapDetailProperties<TDest>(
         this IMappingExpression<Ticket, TDest> mapBase) where TDest : Detail
    {
        return mapBase
            .ForMember(dest => dest.Priority, 
                opt => opt.MapFrom(src => src.Priority.Code))
             ///....
            .ForMember(dest => dest.TeamMembers, 
               opt => opt.MapFrom(src => src
                   .Schedules.Where(s => s.CompleteTime == null)));
    }
}

然后在注册Ticket -> UpdateTicket -> Edit映射器时使用该扩展方法:

Mapper.CreateMap<Ticket, Update>()
    .MapDetailProperties()
    .ForMember(m => m.Schedules, opt => opt.MapFrom(t => t.Schedules
        .Where(s => s.EmployeeID == Util.CurrentUserID() && 
            s.CompleteTime == null)));
Mapper.CreateMap<Ticket, Edit>()
    .MapDetailProperties();

然后你可以正常使用地图:

Ticket ticket = new Ticket();    
var edit = Mapper.Map<Ticket, Edit>(ticket);
var update = Mapper.Map<Ticket, Update>(ticket); 

我是否正确使用了Automapper 2.0的Include功能?

否--当使用.Include时,AutoMapper希望目标类与源类处于类似的层次结构中(此处将对此进行进一步讨论)。换句话说,如果要映射到TicketDetailUpdateEdit的不同子类,则Include将是合适的。

这对你的情况似乎没有帮助。我建议使用.Map的重载,它接受一个现有的对象并对其进行修改

Ticket ticket = new Ticket();
Edit edit = new Edit();
Mapper.Map<Ticket, Detail>(ticket, edit); 
// Edit has now been automapped using the base mapping.
Mapper.Map<Ticket, Edit>(ticket, edit); 
// The properties unique to Edit have now been mapped.

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