Question

试图在User和Artist之间建立一对零关系，并选择ArtistId作为主键和外键，但是在插入数据时，数据库不会让我

错误

Cannot insert explicit value for identity column in table 'Artists' when IDENTITY_INSERT is set to OFF

模型

    public class User
    {
        [Key]
        public int UserId { get; set; }

        [Required]
        [EmailAddress]
        public string Email { get; set; }

        [Required]
        [MinLength(3)]
        [MaxLength(255)]
        public string Password { get; set; }

        [Required]
        public byte RoleId { get; set; }

        public DateTime RegisterDate { get; set; }

        public Artist Artist { get; set; }
    }
    public class Artist
    {
        [ForeignKey("User")]
        public int ArtistId { get; set; }

        public string ProfilePhoto { get; set; }

        public string Bio { get; set; }

        public User User { get; set; }
    }

控制器中的动作

public ActionResult Register(ArtistRegisterViewModel viewModel)
        {
            if (ModelState.IsValid)
            {
                if (viewModel.ConfirmPassword == viewModel.User.Password)
                {
                    var user = new User
                    {
                        Email = viewModel.User.Email,
                        Password = viewModel.User.Password,
                        RegisterDate = DateTime.Now,
                        RoleId = RoleType.Artist
                    };

                    var artist = new Artist
                    {
                        Bio = viewModel.Artist.Bio,
                        ProfilePhoto = viewModel.Artist.ProfilePhoto,
                    };

                    _context.Users.Add(user);
                    _context.Artists.Add(artist);
                    _context.SaveChanges();

                    return Content("New Artist Created");
                }
            }

            return View("Register", viewModel);
        }

Answer 1

注释ArtistId，以便EF不会为PK创建身份：

[ForeignKey("User")]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int ArtistId { get; set; }

ASP.NET MVC“ IDENTITY_INSERT设置为OFF”

1 个答案: