[英]Can't save nested object in entity framework
I'm new in Asp.Net MVC. 我是Asp.Net MVC的新手。 I use standart Membership provider in my project.
我在我的项目中使用了标准会员资格提供程序。 I have Application User and ApplicationDbContext
我有应用程序用户和ApplicationDbContext
public class ApplicationUser : IdentityUser
{
[Required]
public virtual UserInfo UserInfo { get; set; }
public virtual ICollection<Lot> Lots { get; set; }
}
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public DbSet<Lot> Lots { get; set; }
public DbSet<Product> Products { get; set; }
public DbSet<UserInfo> UserInfoes { get; set; }
public DbSet<PersonalInformation> PersonalInformations { get; set; }
public ApplicationDbContext()
: base("DefaultConnection")
{
}
}
and UserInfo 和UserInfo
public class UserInfo
{
[Key]
public int UserInfoId { get; set; }
public DateTime RegistarationDate { get; set; }
public decimal Money { get; set; }
public decimal CurrentDebt { get; set; }
public virtual PersonalInformation PersonalInformation { get; set; }
public virtual ApplicationUser ApplicationUser { get; set; }
}
Personal Information 个人信息
public class PersonalInformation
{
public int PersonalInformationId { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Telephone { get; set; }
public Adress Adress { get; set; }
}
my RegisterViewModel 我的RegisterViewModel
public class RegisterViewModel
{
[Required]
[Display(Name = "User name")]
public string UserName { get; set; }
[Required]
[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
[DataType(DataType.Password)]
[Display(Name = "Password")]
public string Password { get; set; }
[DataType(DataType.Password)]
[Display(Name = "Confirm password")]
[Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
public string ConfirmPassword { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public decimal Money { get; set; }
public string Telephone { get; set; }
}
and action create in controller 和动作在控制器中创建
[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Register(RegisterViewModel model)
{
if (ModelState.IsValid)
{
var user = new ApplicationUser()
{
UserName = model.UserName,
UserInfo = new UserInfo()
{
CurrentDebt = 0,
Money = model.Money,
RegistarationDate = DateTime.Now,
PersonalInformation = new PersonalInformation()
{
FirstName = model.FirstName,
LastName = model.LastName,
Telephone = model.Telephone,
}
}
};
var result = await UserManager.CreateAsync(user, model.Password);
if (result.Succeeded)
{
await SignInAsync(user, isPersistent: false);
return RedirectToAction("Index", "Home");
}
else
{
AddErrors(result);
}
}
// If we got this far, something failed, redisplay form
return View(model);
}
And when I fill all fields that're mentioned in action, i receivee this error 当我填写行动中提到的所有字段时,我收到此错误
Cannot insert the value NULL into column 'UserInfoId', table 'DefaultConnection.dbo.UserInfoes'; 无法将值NULL插入表'DefaultConnection.dbo.UserInfoes'的'UserInfoId'列中; column does not allow nulls.
列不允许为空。 INSERT fails.
INSERT失败。 The statement has been terminated.
该语句已终止。
Could anybody help me? 有人可以帮我吗? Thanks a lot
非常感谢
You need to tell EF that UserInfoId
is a Key
against the table so it maps it as an Identity
. 您需要告诉EF
UserInfoId
是针对该表的Key
,因此它将其映射为Identity
。
Something like this would work in a mapping file: 这样的事情将在映射文件中起作用:
public class UserInfoMap : EntityTypeConfiguration<UserInfo>
{
public UserInfoMap()
{
ToTable("UserInfo");
HasKey(m => m.UserInfoId );
}
}
When the code first migration runs, it generates something like this: 当代码首次迁移运行时,它会生成如下内容:
CreateTable(
"dbo.UserInfo",
c => new
{
UserInfoId = c.Int(nullable: false, identity: true)
)
which means you won't need to specify the Id as it will auto populate in the database. 这意味着您无需指定ID,因为它会自动填充到数据库中。
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