[英]AutoMapper - Map Many-to-Many Relationships
在我的 DAL 中,我有以下模型建立了多對多關系。
public class FamilyMember
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public ICollection<FamilyMemberPhone> FamilyMemberPhones { get; set; }
}
public class FamilyMemberPhone
{
public int FamilyMemberId { get; set; }
public int PhoneId { get; set; }
public FamilyMember FamilyMember { get; set; }
public Phone Phone { get; set; }
}
public class Phone : AuditableEntity
{
public int Id { get; set; }
public string PhoneNumber { get; set; }
public bool IsPreferred { get; set; }
public ICollection<FamilyMemberPhone> FamilyMemberPhones { get; set; }
}
在我的 DTO 中,我有以下課程
public class FamilyMemberDto
{
public int Id { get; set; }
public int FamilyId { get; set; }
[Required]
public string FirstName { get; set; }
[Required]
public string LastName { get; set; }
public bool IsPrimary { get; set; }
[Required]
public List<Phone> FamilyMemberPhones { get; set; }
public string FullName => $" {FirstName} {LastName}";
}
public class PhoneDto
{
public int Id { get; set; }
public string PhoneNumber { get; set; }
public bool IsPreferred { get; set; }
public PhoneType PhoneType { get; set; }
}
我的映射配置如下所示:
CreateMap<Dal.Models.Phone, Dto.PhoneDto>().ReverseMap().IgnoreAuditableFields();
CreateMap<Dal.Models.FamilyMember, Dto.FamilyMemberDto>();
CreateMap<Dal.Models.FamilyMemberPhone, Dto.PhoneDto>()
.ForMember(d => d.Id, opt => opt.MapFrom(s => s.Id))
.ForMember(d => d.PhoneNumber, opt => opt.MapFrom(s => s.Phone.PhoneNumber))
.ForMember(d => d.PhoneType, opt => opt.MapFrom(s => s.Phone.PhoneType));
CreateMap<Dto.FamilyMemberDto, Dal.Models.FamilyMember>()
.AfterMap((s, d) =>
{
if (d.FamilyMemberPhones != null)
foreach (var fmp in d.FamilyMemberPhones)
fmp.Id = s.Id;
});
CreateMap<Dto.PhoneDto, Dal.Models.FamilyMemberPhone>()
.ForMember(d => d.PhoneId, opt => opt.MapFrom(s => s.Id));
我的單元測試如下所示:
var member = new Bll.Dto.FamilyMemberDto
{
FamilyId = 12,
FirstName = "Jane",
LastName = "Doe",
BirthDate = DateTime.Parse("11-01-1990"),
Email = "test@test.com",
FamilyMemberPhones = new List<Bll.Dto.PhoneDto>
{
new Bll.Dto.PhoneDto
{
PhoneNumber = "test",
IsPreferred = true,
},
new Bll.Dto.Phone
{
PhoneNumber = "hello",
IsPreferred = false,
}
}
};
await Manager.Save(member);
當我嘗試使用Mapper.Map<Dal.Models.FamilyMember>(dto)
將DTO
Model
DTO 轉換為 Model 時,在entity.FamilyMemberPhones
ZA8CFDE I6331BD59EB2AC96 中的兩個項目11BD59EB2AC96 然而,深入挖掘該集合,所有Dal.Models.Phone
屬性都是 null。
我究竟做錯了什么?
從代碼的這個區域
CreateMap<Dto.FamilyMemberDto, Dal.Models.FamilyMember>()
.AfterMap((s, d) =>
{
if (d.FamilyMemberPhones != null)
foreach (var fmp in d.FamilyMemberPhones)
fmp.Id = s.Id;
});
您正在為循環中創建的變量賦值。 即fmp.Id = s.Id;
也許代替s.Id = fmp.Id;
甚至是別的東西。 因為這看起來不像你在那里做任何事情。
@formula12 的回答引發了我的一個想法。 我需要考慮添加到家庭成員的每個電話號碼。 結果,每次我將FamilyMemberDto
映射到FamilyMember
時,我還需要考慮 map 內的Phone
列表。
這是我的新映射配置文件:
CreateMap<Phone, Dto.PhoneDto>().ReverseMap().IgnoreAuditableFields();
CreateMap<FamilyMember, Dto.FamilyMemberDto>();
CreateMap<FamilyMemberPhone, Dto.PhoneDto>()
.ForMember(d => d.Id, opt => opt.MapFrom(s => s.Id))
.ForMember(d => d.PhoneNumber, opt => opt.MapFrom(s => s.Phone.PhoneNumber))
.ForMember(d => d.PhoneType, opt => opt.MapFrom(s => s.Phone.PhoneType));
CreateMap<Dto.FamilyMemberDto, FamilyMember>()
.AfterMap((s, d) =>
{
var memberPhones = new List<FamilyMemberPhone>();
foreach (var fmp in s.FamilyMemberPhones)
{
var phone = new FamilyMemberPhone
{
Phone = new Phone
{
Id = fmp.Id,
PhoneNumber = fmp.PhoneNumber,
PhoneType = fmp.PhoneType
}
};
memberPhones.Add(phone);
}
d.FamilyMemberPhones = memberPhones;
});
CreateMap<Dto.PhoneDto, FamilyMemberPhone>()
.ForMember(d => d.PhoneId, opt => opt.MapFrom(s => s.Id));
用例:假設我的家庭成員在FaimlyMemberDto.FamilyMemberPhones
中有三 (3) 個項目,這是一個List<PhoneDto>
,在進行映射過程時,我的實體現在在FamilyMember
object 的ICollection<FamilyMemberPhones>
中有 3 個FamilyMemberPhone
對象。 在每一個里面,現在有一個Phone
object 映射到PhoneDto
。
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