复杂类型的AutoMapper

Question

我在尝试使用复杂类型时遇到问题AutoMapper。

我有两个对象，一个域和ViewModel utlize在我的视图;

视图模型

public class RegisterCoupleModel 
{ 
    [Required(ErrorMessage = "campo obrigatório")] 
    [Display(Name = "Primeiro nome", Order = 0, GroupName = "Noivo")] 
    [StringLength(60)] 
    public string FistNameGroom 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [Display(Name = "Último nome", Order = 1, GroupName = "Noivo")] 
    [StringLength(60)] 
    public string LastNameGroom 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [RegularExpression(@"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$", ErrorMessage = "Formato de email inválido.")] 
    [DataType(DataType.EmailAddress)] 
    [Remote("IsEmailAvailable", "Validation", "", ErrorMessage = "este email já está sendo usado por outro usuário.")] 
    [Display(Name = "Email", Order = 2, GroupName = "Noivo")] 
    [StringLength(180)] 
    public string EmailGroom 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [Display(Name = "Primeiro nome", Order = 0, GroupName = "Noiva")] 
    [StringLength(60)] 
    public string FistNameBride 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [Display(Name = "Último nome", Order = 1, GroupName = "Noiva")] 
    [StringLength(60)] 
    public string LastNameBride 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [RegularExpression(@"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$", ErrorMessage = "Formato de email inválido.")] 
    [DataType(DataType.EmailAddress)] 
    [Remote("IsEmailAvailable", "Validation", "", ErrorMessage = "este email já está sendo usado por outro usuário.")] 
    [Display(Name = "Email", Order = 2, GroupName = "Noiva")] 
    [StringLength(180)] 
    public string EmailBride 
    { 
     get; 
     set; 
    } 

    [Required(ErrorMessage = "campo obrigatório")] 
    [Display(Name = "Url")] 
    [RegularExpression(@"^[a-zA-Z0-9_\-\.\+]{5,22}$", ErrorMessage = "Chave inválida")] 
    [StringLength(22, MinimumLength = 5, ErrorMessage = "A chave deve ter entre {0} e {1} caracteres.")] 
    [Remote("IsKeywordAvaliable", "Validation")] 
    public string UrlKeyword 
    { 
     get; 
     set; 
    } 

    [Display(Name = "Voce é humano?")] 
    [UIHint("ReCaptcha")] 
    public string ReCaptcha 
    { 
     get; 
     set; 
    } 
} 

域对象

public class Couple 
{ 
    [Key] 
    public Guid Id { get; set; } 
    public string UrlKeyword { get; set; } 
    public virtual Partner Groom { get; set; } 
    public virtual Partner Bride { get; set; } 
    public DateTime Marriage { get; set; } 
    public DateTime Dating { get; set; } 
    public DateTime Engagement { get; set; } 
    public virtual ICollection<User> Users { get; set; } 
} 

如果你看看你会看到我的对象Couple域有属性有Bride和Groom这实际上是同一类型。

如何映射我的域对象Couple与RegisterCoupleModel？

这里我做到了尽可能：

在设置automapper试着这样做：

CreateMap<RegisterCoupleModel, Couple>() 
    .ForMember(dest => dest.Bride.User.FirstName, opt => opt.MapFrom(source => source.FistNameBride)) 
    .ForMember(dest => dest.Bride.User.LastName, opt => opt.MapFrom(source => source.LastNameBride)) 
    .ForMember(dest => dest.Bride.User.Email, opt => opt.MapFrom(source => source.EmailBride)) 
    .ForMember(dest => dest.Groom.User.FirstName, opt => opt.MapFrom(source => source.FistNameGroom)) 
    .ForMember(dest => dest.Groom.User.LastName, opt => opt.MapFrom(source => source.LastNameGroom)) 
    .ForMember(dest => dest.Groom.User.Email, opt => opt.MapFrom(source => source.EmailGroom)); 

但显示以下错误：

表达“DEST => dest.Bride.User.FirstName'必须解析为 顶级成员。参数名称：lambda表达式

我知道这需要尝试使用映射属性与嵌套类型的行为。

但我怎么能映射到RegisterCoupleModel和Couple两个属性Bride和Groom是同一类型？

我发现question here on StackOverflow看起来像这样，但它帮助了我。

Answer 1

什么，我会做的是封装属性为FirstNameBride，LastNameBride，EmailBride，FirstNameGroom，LastNameGroom，EmailGroom到嵌套视图模型类型，比方说PersonDetails：

public class PersonDetails 
{ 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public string Email { get; set; } 
} 

并相应地更新您的父虚拟机：

public class RegisterCoupleModel 
{ 
    public PersonDetails GroomDetails { get; set; } 
    public PersonDetails BrideDetails { get; set; } 
} 

然后，您可以提供从PersonDetails到User（或任何类型的Groom。用户）：

Mapper.CreateMap<PersonDetails,User>(); 

注意我怎么有这么露骨属性映射 - >因为场在源和目的地的名称相同，因此无需显式映射。请尽可能地尝试并做到这一点。代码越少 - >代码越好。

那么除了上述映射，只需做到这一点：

Mapper.CreateMap<RegisterCoupleModel, Couple>(); 

而且AutoMapper会看到RegisterCoupleModel有两个PersonDetails对象，看到它已经有一个映射定义，然后自动使用它。

这应该工作（我以前做过）。

您不应该总是使用平面视图模型，在必要时将它们嵌套（例如重新使用字段）。