Automapper双向复杂映射

Question

我在配置Automapper以获得预期的组件时遇到问题。

我有3个实体：

public abstract class Item
{
public Guid Id { get; set; }
public string Name { get; set; }
}

public class Ingredient
{
public Guid Id { get; set; }
public Item Item { get; set; }
public int Quantity { get; set; }
}

public class ConstructionItem : Item
{
public Guid Id { get; set; }
public List<Ingredient> Recipe { get; set; };
}

对于每个实体，我都有一个相应的dto:

public abstract class ItemDto
{
public Guid Id { get; set; }
public string Name { get; set; }
}

public class IngredientDto
{
public Guid ItemId { get; set; }
public int Quantity { get; set; }
}

public class ConstructionItemDto : ItemDto
{
public List<IngredientDto> Recipe { get; set; }
}

我还有两个请求模型：

public class CreateConstructionItemRequest {
public string Name { get; set; }
public List<IngredientDto> Recipe { get; set; }
}

public class UpdateConstructionItemRequest {
public Guid Id { get; set; }
public string Name { get; set; }
public List<IngredientDto> Recipe { get; set; }
}

问题：

• 如何将CreateConstructionItemRequest和UpdateConstructionItemRequest绑定到实际的ConstructionItem
• 如何将ConstructionItemDto映射到ConstructionItem，反之亦然

感谢您的帮助！

编辑1:

以下是我尝试过的：

public class GeneralProfile : Profile
{
public GeneralProfile()
{
CreateMap<Ingredient, IngredientDto>()
.ForMember(x => x.Item, opt => opt.MapFrom(x => x.Item.Id));
CreateMap<CreateConstructionItemRequest, ConstructionItem>();
CreateMap<UpdateConstructionItemRequest, ConstructionItem>();
CreateMap<ConstructionItem, ConstructionItemDto>();
}
}

问题：

• 无法将ConstructionItem映射到ConstructionItemDto
• 无法将CreateConstructionItemRequest映射到ConstructionItem
• 无法将UpdateConstructionItemRequest映射到ConstructionItem

编辑2:

错误：

AutoMapper.AutoMapperMappingException: Error mapping types.
Mapping types:
CreateConstructionItemRequest -> ConstructionItem
MyApp.Application.Features.ConstructionItems.Commands.CreateConstructionItemRequest -> MyApp.Domain.Entities.ConstructionItem
Type Map configuration:
CreateConstructionItemRequest -> ConstructionItem
MyApp.Application.Features.ConstructionItems.Commands.CreateConstructionItemRequest -> MyApp.Domain.Entities.ConstructionItem
Destination Member:
Recipe
---> AutoMapper.AutoMapperMappingException: Missing type map configuration or unsupported mapping.
Mapping types:
IngredientDto -> Ingredient

Answer 1

您可以使用一个请求模型，而不是两个模型：

public class ConstructionItemRequest {
public Guid Id { get; set; }
public string Name { get; set; }
public List<IngredientDto> Recipe { get; set; }
}

对于映射配置文件，请尝试以下操作：

public GeneralProfile()
{
CreateMap<Ingredient, IngredientDto>().ReverseMap();
CreateMap<Item, ItemDto>().ReverseMap();            
CreateMap<ConstructionItemRequest, ConstructionItem>().ReverseMap();
CreateMap<ConstructionItem, ConstructionItemDto>().ReverseMap();
}