具有很多对很多和IncludeMembers的自动映射器 [英] Automapper with many to many and IncludeMembers
问题描述
下面是我的班级
public class Account
{
public int Id { get; set; }
public string AccountNumber { get; set; } = null!;
..other fields
public SubAccount1 SubAccount1 { get; set; } = null!;
public SubAccount2 SubAccount2 { get; set; } = null!;
public ICollection<AccountCustomer> AccountAndCustomers { get; set; } = new List<AccountCustomer>(); ///Many to many mapping
}
public class AccountCustomer
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public int CustomerId { get; set; }
public Customer Customer { get; set; } = null!;
...other fields
}
public class SubAccount1
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public string Subfield1 { get; set; } = null!;
..other fields
}
public class SubAccount2
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public string Subfield2 { get; set; } = null!;
..other fields
}
public class SubAccount1DTO
{
public int AccountId { get; set; }
public string AccountNumber { get; set; } = null!;
public string Subfield1 { get; set; } = null!;
public IReadOnlyList<CustomerDTO> Customers { get; set; } = new List<CustomerDTO>();
}
public class CustomerDTO
{
public int Id { get; set; }
public string CustomerNo { get; set; } = null!;
public string FirstName { get; set; } = null!;
..other fillds
}
public class Customer
{
public int Id { get; set; }
public string? CustomerNo { get; set; } = null!;
....other filds
public ICollection<AccountCustomer> AccountAndCustomers { get; set; } = new List<AccountCustomer>();
}
基于此链接的自动映射器配置解决方案
以下映射
.ForMember(d => d.Customers, opt => opt.MapFrom(s => s.AccountAndCustomers))
将类型为ICollection<AccountCustomer>的源属性映射到类型为IReadOnlyList<CustomerDTO>的目标属性.
AutoMapper允许这样做，但需要您创建集合元素类型的映射-在这种特定情况下，是AccountCustomer到CustomerDTO(在链接的帖子中，从BookCategory到CategoryDto的映射也类似)./p>
因此，您需要的最低要求是在映射器配置中添加以下内容:
CreateMap<AccountCustomer, CustomerDTO>()
.IncludeMembers(s => s.Customer);
Below is my Class
public class Account
{
public int Id { get; set; }
public string AccountNumber { get; set; } = null!;
..other fields
public SubAccount1 SubAccount1 { get; set; } = null!;
public SubAccount2 SubAccount2 { get; set; } = null!;
public ICollection<AccountCustomer> AccountAndCustomers { get; set; } = new List<AccountCustomer>(); ///Many to many mapping
}
public class AccountCustomer
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public int CustomerId { get; set; }
public Customer Customer { get; set; } = null!;
...other fields
}
public class SubAccount1
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public string Subfield1 { get; set; } = null!;
..other fields
}
public class SubAccount2
{
public int AccountId { get; set; }
public Account Account { get; set; } = null!;
public string Subfield2 { get; set; } = null!;
..other fields
}
public class SubAccount1DTO
{
public int AccountId { get; set; }
public string AccountNumber { get; set; } = null!;
public string Subfield1 { get; set; } = null!;
public IReadOnlyList<CustomerDTO> Customers { get; set; } = new List<CustomerDTO>();
}
public class CustomerDTO
{
public int Id { get; set; }
public string CustomerNo { get; set; } = null!;
public string FirstName { get; set; } = null!;
..other fillds
}
public class Customer
{
public int Id { get; set; }
public string? CustomerNo { get; set; } = null!;
....other filds
public ICollection<AccountCustomer> AccountAndCustomers { get; set; } = new List<AccountCustomer>();
}
Auto mapper configuration based on this link Automapper many to many
CreateMap<Customer, CustomerDTO>().ReverseMap();
CreateMap<Account, SubAccount1DTO>()
.IncludeMembers(s => s.SubAccount1)
.ForMember(d => d.Customers, opt => opt.MapFrom(s => s.AccountAndCustomers)) ///After include Customers related am getting error
.ReverseMap()
.AfterMap((s, d) =>
{
foreach (var accountCustomer in d.AccountAndCustomers)
accountCustomer.AccountId = s.AccountId ;
});
CreateMap<SubAccount1, SubAccount1DTO>(MemberList.None)
.ForMember(dest => dest.Id, opt => opt.Ignore())
.ForMember(dest => dest.AccountNumber, opt => opt.Ignore())
.ReverseMap();
CreateMap<Customer, AccountCustomer>() ----i dnt no whether this to included
.ForMember(dest => dest.CustomerId, opt => opt.MapFrom(src => src.Id))
.ForMember(dest => dest.Customer, opt => opt.MapFrom(src => src))
.ForMember(dest => dest.AccountId, opt => opt.Ignore())
.ForMember(dest => dest.Account, opt => opt.Ignore())
;
I need to map Account to SubAccount1DTO and Reversemap. Here SubAccount1DTO has list of customersdto But when i included below line
.ForMember(d => d.Customers, opt => opt.MapFrom(s => s.AccountAndCustomers))
i am getting below error .. Please suggest
One or more errors occurred. (The following member on Application.DTOs.Accounts.SubAccount1DTO cannot be mapped: Customers Add a custom mapping expression, ignore, add a custom resolver, or modify the destination type Application.DTOs.Accounts.SubAccount1DTO. Context: Mapping to member Customers from Domain.Entities.Accounts.Account to Application.DTOs.Accounts.SubAccount1DTO
The following mapping
.ForMember(d => d.Customers, opt => opt.MapFrom(s => s.AccountAndCustomers))
maps source property of type ICollection<AccountCustomer> to destination property of type IReadOnlyList<CustomerDTO>.
AutoMapper allows that, but requires you to create map for collection element types - in this specific case, AccountCustomer to CustomerDTO (in the linked post there is similar mapping from BookCategory to CategoryDto).
Hence the minimum you need here is adding something like this to the mapper configuration:
CreateMap<AccountCustomer, CustomerDTO>()
.IncludeMembers(s => s.Customer);
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