Question

在我运行项目时使用代码第一种方法。在新用户注册期间，实体框架抛出此异常：

Additional information: Entities in 'ApplicationDbContext.IdentityUsers' participate in the 'ApplicationUser_UserDetails' relationship. 0 related 'ApplicationUser_UserDetails_Target' were found. 1 'ApplicationUser_UserDetails_Target' is expected.

引发了异常：

var manager = new UserManager();
var user = new ApplicationUser() { UserName = UserName.Text };
//This line At the time of creating user
IdentityResult result = manager.Create(user, Password.Text);

我创建了架构代码：

public class ApplicationUser : IdentityUser
    {
        public Nullable<DateTime> DateOfCreation { get; set; }
        public Nullable<bool> IsActive { get; set; }
        public Nullable<DateTime> LastLogin { get; set; }
        public UserDetails UserDetails { get; set; }
        public virtual ICollection<TaskSheetManagement> TaskSheet { get; set; }
        public virtual ICollection<Projects> Projects { get; set; }
    }

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext()
            : base("DefaultConnection")
        {
        }

        protected override void OnModelCreating(System.Data.Entity.DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<IdentityUser>().HasKey(pk => pk.Id).ToTable("Users");
            modelBuilder.Entity<ApplicationUser>().HasKey(pk=>pk.Id).ToTable("Users");
            modelBuilder.Entity<UserDetails>().HasKey(pk => pk.UserDetailId).ToTable("UserDetails");
            modelBuilder.Entity<ApplicationUser>().HasRequired(p => p.UserDetails).WithRequiredPrincipal(c => c.ApplicationUser);
            modelBuilder.Entity<ApplicationUser>()
                .Property(t => t.UserName).IsRequired()
                .HasMaxLength(14)
                .HasColumnAnnotation("Index",
                new IndexAnnotation(new IndexAttribute("U_Username", 1) { IsUnique = true }));
            modelBuilder.Entity<UserDetails>()
                .Property(t => t.Email).IsRequired()
                .HasMaxLength(25)
                .HasColumnAnnotation("Index",
                new IndexAnnotation(new IndexAttribute("U_Email", 2) { IsUnique = true }));
            base.OnModelCreating(modelBuilder);
        }
    }

UserDetails是：

public class UserDetails
{
    public int UserDetailId { get; set; }
    public string Name { get; set; }
    public string Email { get; set; }
    public string CountryName { get; set; }
    public string Gender { get; set; }
    public string Nic { get; set; }
    public string ResidentAddress { get; set; }
    public string CellNO { get; set; }
    public string PhoneNo { get; set; }
    public string Religion { get; set; }
    public ApplicationUser ApplicationUser { get; set; }
}

我无法找出与此异常相关的内容。我搜索谷歌并实施其他解决方案，但无法解决。请帮助。

Answer 1

您已创建1：1关联，但1：1关联在Entity Framework中不会以这种方式工作。

1：1关联必须共享相同的主键。你定义它的方式是两个1：M关联，它们相互冲突。

如果你想要1：1，那么你必须将UserDetails的主键更改为Id，然后你必须将它们与以下内容一起映射：

 modelBuilder.Entity<UserDetails>().HasRequired(x => x.ApplicationUser)
            .WithRequiredDependent(x => x.UserDetails);

运行时实体框架异常：参与关系的实体？

1 个答案: