如何在复杂的嵌套映射中映射DTO

Question

如何使用自动映射器将对象属性数组映射为复杂类型的对象数组

我的类结构如下：

public class Product : Entity, IAggregateRoot
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }

    public virtual List<ProductPicture> ProductPictures { get; set; }
    public virtual List<ProductSpecification> Specifications { get; set; }
}

public class ProductSpecification : Entity
{
    public Guid ProductId { get; set; }
    public Guid SpecificationId { get; set; }

    public virtual Product Product { get; set; }
    public virtual Specification Specification { get; set; }
    public virtual List<ProductSpecificationData> Data { get; set; }
}

public class ProductSpecificationData : Entity
{
    public Guid Id { get; set; }
    public Guid ProductSpecificationId { get; set; }
    public string Value { get; set; }

    public virtual ProductSpecification ProductSpecification { get; set; }
}

public class Specification: Entity, IAggregateRoot
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }

    public virtual List<ProductSpecification> ProductSpecifications { get; set; }
}

我想将产品映射到ProductDetailDTO

public class ProductDetailDTO
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }

    public class ProductSpecification
    {
        public string Name { get; set; } //from specification
        public string Description { get; set; }  //from specification

        public class ProductSpecificationData
        {
            public string Value { get; set; }
        }
        public List<ProductSpecificationData> Data { get; set; } //from ProductSpecificationData 
    }

    public List<ProductSpecification> Specifications { get; set; }
 }

我总是在ProductDetailDTO-> ProductSpecification-> Data中获取数据。

我试图做这样的事情：

mc.CreateMap<Product, ProductDetailDTO>().ForMember(dest => dest.PictureUris, mo => { mo.MapFrom(src => src.ProductPictures.Select(pp => pp.PictureUri)); })
                                         .ForMember(dest => dest.Specifications, mo => { mo.MapFrom(src => src.Specifications.Select(s => s.Specification)); });
    
mc.CreateMap<Specification, ProductDetailDTO.ProductSpecification>();
mc.CreateMap<ProductSpecificationData, ProductDetailDTO.ProductSpecification.ProductSpecificationData>();

地图调用的代码：

Product Product = new Product
{
    Name = "test product",
    Description = "test product description",
    ProductPictures = new List<ProductPicture>
    {
        new ProductPicture { PictureUri = "test uri 1" },
        new ProductPicture { PictureUri = "test uri 2" }
    },
    Specifications = new List<ProductSpecification>
    {
        new ProductSpecification {
            Specification = new Specification
            {
                Name = "test specification 1",
                Description = "test specification description 1",
            },
            Data = new List<ProductSpecificationData>
            {
                new ProductSpecificationData
                {
                    Data1 = "test data1",
                    Data2 = "test data2",
                }
            }
        },
    }
};

ProductDetailDTO productDetail = mapper.Map<ProductDetailDTO>(Product);