c# - Automapper - ReverseMap() 不执行映射

Question

我有以下两个类:

public class ReferenceEngine
{
    public Guid ReferenceEngineId { get; set; }
    public string Description { get; set; }
    public int Horsepower { get; set; }
}

public class Engine
{
    public Guid Id { get; set; }
    public string Description { get; set; }
    public int Power { get; set; }
}

我正在使用 automapper 执行从 ReferenceEngine 到 Engine 的映射，反之亦然。请注意，属性 ReferenceEngineId/Id 和 Horsepower/Power 的名称不同。

下面的映射配置有效，并且成功映射了具有不同名称的属性:

public static void ConfigureMapperWorking()
{
    AutoMapper.Mapper.CreateMap<ReferenceEngine, Engine>()
        .ForMember(dest => dest.Description, opt => opt.MapFrom(src => src.Description)).ReverseMap();

    AutoMapper.Mapper.CreateMap<ReferenceEngine, Engine>()
        .ForMember(dest => dest.Id, opt => opt.MapFrom(src => Guid.Parse(src.ReferenceEngineId.ToString())))
        .ForMember(dest => dest.Power, opt => opt.MapFrom(src => src.Horsepower));

    AutoMapper.Mapper.CreateMap<Engine, ReferenceEngine>()
        .ForMember(dest => dest.ReferenceEngineId, opt => opt.MapFrom(src => Guid.Parse(src.Id.ToString())))
        .ForMember(dest => dest.Horsepower, opt => opt.MapFrom(src => src.Power));
}

然而，尽管我在末尾调用了方法 ReverseMap()，但以下内容不起作用:

public static void ConfigureMapperNotWorking()
{
    AutoMapper.Mapper.CreateMap<ReferenceEngine, Engine>()
        .ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.ReferenceEngineId))
        .ForMember(dest => dest.Description, opt => opt.MapFrom(src => src.Description))
        .ForMember(dest => dest.Power, opt => opt.MapFrom(src => src.Horsepower)).ReverseMap();
}

我的问题是，当属性名称不同时，我们是否应该手动指定 TSource->TDestination 和 TDestination->TSource 映射？我认为 ReverseMap 的目的是避免我们手动指定双向映射。

Answer 1

ReverseMap 只创建一个简单的反向映射。例如它会自动配置

Mapper.CreateMap<Engine, ReferenceEngine>();

来自

Mapper.CreateMap<ReferenceEngine, Engine>();

要获得更复杂的东西，您必须手动配置它。