Automapper ResolveUsing导致"无法将此解析为可查询表达式"

Question

我正在使用autommaper将域类映射到模型类,反之亦然.我需要加密/解密一个属性.当我将Model映射到Domain时没有问题,完美地工作:

Mapper.CreateMap<EntityModel, Entity>().ForMember(dest => dest.Password, opt => opt.ResolveUsing(src => this.EncryptString(src.Password)))

但是当将实体映射到模型的自动化程序崩溃并抛出"无法将其解析为可查询表达式"时:

Mapper.CreateMap<Entity, EntityModel>().ForMember(dest => dest.Password, opt => opt.ResolveUsing(src => this.DecryptString(src.Password)))

我也尝试过自定义值解析器,结果相同:

Mapper.CreateMap<Entity, EntityModel>().ForMember(dest => dest.Password, op => op.ResolveUsing<PasswordResolver>().FromMember(x => x.Password));


public class PasswordResolver : ValueResolver<object, string>
{
        protected override string ResolveCore(object source)
    {
        return "TEST";
    }

}

Answer 1

如文档所述,您不能在可查询表达式中使用自定义解析器:

https://github.com/AutoMapper/AutoMapper/wiki/Queryable-Extensions#supported-mapping-options

但是,您可以使用MapFrom:

Mapper.CreateMap<Entity, EntityModel>()
    .ForMember(dest => dest.Password, op => op.MapFrom(src => "TEST"));

我猜这不是你想要为密码属性做什么,但这就是你可以修复这个例子的方法.