为什么AutoMapper不映射我的子对象

本文关键字：对象 我的 映射 AutoMapper 为什么 | 更新日期: 2023-09-27 18:01:53

我有两个实体(表)Person和Address。Address是Person的子实体。

public class Person
{
    public Person()
    {
        Addresses = new ObservableCollection<Address>();
    }
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [DisplayName("Primary Key")]
    [ScaffoldColumn(false)]
    public int Id { get; set; }
    [Required]
    [DisplayName("First Name")]
    [StringLength(25, MinimumLength = 3)]
    public string FirstName { get; set; }
    [DisplayName("Middle Name")]
    [MaxLength(25)]
    public string MiddleName { get; set; }
    [Required]
    [DisplayName("Last Name")]
    [StringLength(25, MinimumLength = 3)]
    public string LastName { get; set; }
    public string FullName => $"{FirstName} {LastName}";
    [Required]
    [DisplayName("Date of Birth")]
    [DataType(DataType.Date)]
    public DateTime BirthDate { get; set; }
    public ObservableCollection<Address> Addresses { get; set; }
}

public class Address
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [DisplayName("Primary Key")]
    [ScaffoldColumn(false)]
    public int Id { get; set; }
    public int OwnerId { get; set; }
    public Person Owner { get; set; }
    public string Line1 { get; set; }
    public string Line2 { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string ZipCode { get; set; }
}

两个表都有一个(几乎)镜像归档表，分别命名为PersonArchive和AddressArchive。

public class PersonArchive
{
    public PersonArchive()
    {
        Addresses = new ObservableCollection<AddressArchive>();
    }
    [Key]
    [DisplayName("Primary Key")]
    [ScaffoldColumn(false)]
    public int Id { get; set; }
    [Required]
    [DisplayName("First Name")]
    [StringLength(25, MinimumLength = 3)]
    public string FirstName { get; set; }
    [DisplayName("Middle Name")]
    [MaxLength(25)]
    public string MiddleName { get; set; }
    [Required]
    [DisplayName("Last Name")]
    [StringLength(25, MinimumLength = 3)]
    public string LastName { get; set; }
    public string FullName => $"{FirstName} {LastName}";
    [Required]
    [DisplayName("Date of Birth")]
    [DataType(DataType.Date)]
    public DateTime BirthDate { get; set; }
    public ObservableCollection<AddressArchive> Addresses { get; set; }
}
public class AddressArchive
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [DisplayName("Primary Key")]
    [ScaffoldColumn(false)]
    public int Id { get; set; }
    public int OwnerId { get; set; }
    public PersonArchive Owner { get; set; }
    public string Line1 { get; set; }
    public string Line2 { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string ZipCode { get; set; }
}

在Person表中，每个字段都匹配类型，除了一个，Addresses字段是Address的集合，而PeopleArchive中相应的字段是AddressArchive类型。Address的字段Owner也一样。

        using (ArchiveDemoContext context = new ArchiveDemoContext())
        {
            //Person p = context.People.Include("Addresses").FirstOrDefault();
            Person p = context.People.FirstOrDefault();
            MapperConfiguration config = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap<Person, PersonArchive>()
                    .ForMember(dest => dest.Addresses, opt => opt.MapFrom(src => src.Addresses));
                cfg.CreateMap<Address, AddressArchive>()
                    .ForMember(dest => dest.Owner, opt => opt.MapFrom(src => src.Owner));
            });
            config.AssertConfigurationIsValid();
            IMapper mapper = config.CreateMapper();
            PersonArchive person = mapper.Map<Person, PersonArchive>(p);
            //context.People.Remove(p);
            context.PeopleArchive.Add(person);
            context.SaveChanges();
        }

调试代码没有给我任何异常，但是，只有Person被存档，而不是Address。

提前致谢

为什么AutoMapper不映射我的子对象

你不需要映射你的地址回所有者，只要你设置它的所有者Id。修改映射:

cfg.CreateMap<Address, AddressArchive>()
      .ForMember(dest => dest.Owner, opt => opt.Ignore());
相关文章：