使用 AutoMapper 映射两个模型

Question

我有一个 Customer 模型，它与 Address 模型具有一对一的关系。我正在使用 AutoMapper 来映射这些值。我想使用我的 API 在数据库中创建一个新的客户，理想情况下会根据提供给客户模型的信息插入一个新的地址行。

这是 Entity framework 核心收到的 SQL 异常： ---> Microsoft.Data.SqlClient.SqlException (0x80131904): Cannot insert the value NULL into column 'AddressId', table 'dbo.Customers'; column does not allow nulls. INSERT fails.

注意 - BaseEntity 仅包括常见属性，如 ID、并发检查等

客户型号：

public class Customer : BaseEntity
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
   public string Phone { get; set; }
   public string Email { get; set; }
   public string UpdatedBy { get; set; }
   public DateTime? LastContact { get; set; }

   #region Navigation Properties
   public int? AddressId { get; set; }
   public string UserId { get; set; }
   public User User { get; set; }
   public virtual Address Address { get; set; }
   public virtual ICollection<Invoice> Invoices { get; set; }
   #endregion
}

我的地址模型：

public class Address : BaseEntity
{
   public string AddressLine1 { get; set; }
   public string AddressLine2 { get; set; }
   public string City { get; set; }
   public string State { get; set; }
   public string PostalCode { get; set; }

   #region Navigation Properties
   public virtual Customer Customer { get; set; }
   #endregion
}

我正在为请求使用DTO class，如下：

public class CustomerCreateDto
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
   public string Phone { get; set; }
   public string Email { get; set; }
   public string AddressLine1 { get; set; }
   public string AddressLine2 { get; set; }
   public string City { get; set; }
   public string State { get; set; }
   public string PostalCode { get; set; }
   public string UserId { get; set; }
}

AddressDto:

public class AddressDto : BaseEntity
{
   [Required]
   public string AddressLine1 { get; set; }
   public string AddressLine2 { get; set; }
   [Required]
   public string City { get; set; }
   public string State { get; set; }
   [Required]
   [DataType(DataType.PostalCode)]
   public string PostalCode { get; set; }
}

CustomerDto

public class CustomerDto : BaseEntity
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
   public string Phone { get; set; }
   public string Email { get; set; }
   public string UserId { get; set; }
   public int AddressId { get; set; }
   public string UpdatedBy { get; set; }
   public DateTime? LastContact { get; set; }
   public virtual UserDto User { get; set; }
   public virtual AddressDto Address { get; set; }
   public virtual ICollection<InvoiceDto> Invoices { get; set; }
}

这是 AutoMapper 配置

public class MappingConfiguration : Profile
{
   public MappingConfiguration()
   {
      CreateMap<AddressDto, Address>().ReverseMap();
      CreateMap<CustomerDto, Customer>().ForMember(dst => dst.UserId,
       opt => opt.MapFrom(src => src.User.Id)).ForMember(dst => 
       dst.Address, 
       opt => opt.MapFrom(src => src.Address)).ReverseMap();
      CreateMap<CustomerCreateDto, Customer>().ReverseMap();
    }
}

这里是控制器方法。我知道我可以通过像 customer.Address = address 这样的 addressDto 对象手动设置值来做到这一点，但我想看看是否有更好的方法

[HttpPost]
public async Task < IActionResult > Create([FromBody] CustomerCreateDto customerDto) 
{
   if (customerDto == null || !ModelState.IsValid) {
        return BadRequest(ModelState);
   }

   var addressDto = new AddressDto {
        AddressLine1 = customerDto.AddressLine1,
        AddressLine2 = customerDto.AddressLine2,
        City = customerDto.City,
        State = customerDto.State,
        PostalCode = customerDto.PostalCode,
        CreatedDate = DateTime.Now,
    };

    var user = await _userManager.FindByIdAsync(customerDto.UserId);
    var address = _mapper.Map<Address>(addressDto);
    var customer = _mapper.Map<Customer>(customerDto);
    
    customer.CreatedDate = DateTime.Now;

     var result = await _customerRepository.CreateAsync(customer);
     if (result) return Created("Created", new { customer });
     // if we got this far it means the request failed
     return new 
       StatusCodeResult(StatusCodes.Status500InternalServerError);
}

Answer 1

我正在寻找的功能是通过将 CustomerCreateDto 更改为：

public class CustomerCreateDto
{
   public string FirstName { get; set; }
   public string LastName { get; set; }
   public string Phone { get; set; }
   public string Email { get; set; }
   public string UserId { get; set; }
   public virtual AddressDto Address { get; set; }
}

映射配置：

public class MappingConfiguration : Profile
{
   public MappingConfiguration()
   {
      CreateMap<AddressDto, Address>().ReverseMap();
      CreateMap<CustomerDto, Customer>().ForMember(dst => dst.UserId,
        opt => opt.MapFrom(src => src.User.Id));
      CreateMap<CustomerCreateDto, Customer>().ForMember(dst => dst.Address,
        opt => opt.MapFrom(src => src.Address)).ReverseMap().ReverseMap();
    }
}

我的控制器：

[HttpPost]
public async Task<IActionResult> Create([FromBody] CustomerCreateDto customerDto) 
{
   if (customerDto == null || !ModelState.IsValid) {
        return BadRequest(ModelState);
   }
   var customer = _mapper.Map<Customer>(customerDto);
    
   customer.CreatedDate = DateTime.Now;

   var result = await _customerRepository.CreateAsync(customer);
   if (result) return Created("Created", new { customer });

   return new StatusCodeResult(StatusCodes.Status500InternalServerError);
}

使用 AutoMapper 映射两个模型

Mapping two models with AutoMapper

c#

entity-framework-core

automapper

relationship

ef-core-5.0