我为医生、患者和管理员创建了一个注册面板，当我尝试注册或插入数据时，它给出了这样的错误，
SqlException：INSERT 语句与 FOREIGN KEY 约束“FK_AspNetUsers_Departments_DepartmentId”冲突。冲突发生在数据库“Hospitaldb”，表“dbo.Departments”，列“Id”
迁移部分：
migrationBuilder.CreateTable(
name: "AspNetUsers",
columns: table => new
{
Id = table.Column<string>(type: "nvarchar(450)", nullable: false),
Discriminator = table.Column<string>(type: "nvarchar(21)", maxLength: 21, nullable: false),
UserName = table.Column<string>(type: "nvarchar(256)", maxLength: 256, nullable: true),
NormalizedUserName = table.Column<string>(type: "nvarchar(256)", maxLength: 256, nullable: true),
Email = table.Column<string>(type: "nvarchar(256)", maxLength: 256, nullable: true),
NormalizedEmail = table.Column<string>(type: "nvarchar(256)", maxLength: 256, nullable: true),
EmailConfirmed = table.Column<bool>(type: "bit", nullable: false),
PasswordHash = table.Column<string>(type: "nvarchar(max)", nullable: true),
SecurityStamp = table.Column<string>(type: "nvarchar(max)", nullable: true),
ConcurrencyStamp = table.Column<string>(type: "nvarchar(max)", nullable: true),
PhoneNumber = table.Column<string>(type: "nvarchar(max)", nullable: true),
PhoneNumberConfirmed = table.Column<bool>(type: "bit", nullable: false),
TwoFactorEnabled = table.Column<bool>(type: "bit", nullable: false),
LockoutEnd = table.Column<DateTimeOffset>(type: "datetimeoffset", nullable: true),
LockoutEnabled = table.Column<bool>(type: "bit", nullable: false),
AccessFailedCount = table.Column<int>(type: "int", nullable: false),
// I Added This Line
DepartmentId = table.Column<int>(type: "int", nullable: true)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUsers", x => x.Id);
// I Added This Code Block
table.ForeignKey(
name: "FK_AspNetUsers_Departments_DepartmentId",
column: x => x.DepartmentId,
principalTable: "Departments",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
}
部门模型类：
public class Department
{
public int Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public ICollection<ApplicationUser> Employees { get; set; }
}
DbInitializer继承自
IDbInitializerpublic void Initialize()
{
try
{
if (_context.Database.GetPendingMigrations().Count() > 0)
{
_context.Database.Migrate();
}
}
catch (Exception)
{
throw;
}
if (!_roleManager.RoleExistsAsync(WebsiteRoles.Website_Admin).GetAwaiter().GetResult())
{
_roleManager.CreateAsync(new IdentityRole(WebsiteRoles.Website_Admin)).GetAwaiter().GetResult();
_roleManager.CreateAsync(new IdentityRole(WebsiteRoles.Website_Patient)).GetAwaiter().GetResult();
_roleManager.CreateAsync(new IdentityRole(WebsiteRoles.Website_Doctor)).GetAwaiter().GetResult();
_userManager.CreateAsync(new ApplicationUser
{
UserName = "XYZ",
Email = "[email protected]"
}, "XYZ@123").GetAwaiter().GetResult();
var Appuser = _context.ApplicationUsers.FirstOrDefault(x => x.Email == "[email protected]");
if (Appuser != null)
{
_userManager.AddToRoleAsync(Appuser, WebsiteRoles.Website_Admin).GetAwaiter().GetResult();
}
}
}
ApplicationUserpublic class ApplicationUser : IdentityUser
{
public string Name { get; set; }
public Gender Gender { get; set; }
public string Nationality { get; set; }
public string Address { get; set; }
public DateTime DOB { get; set; }
public string Specialist { get; set; }
public bool IsDoctor { get; set; }
public string PictureUrl { get; set; }
public Department Department { get; set; }
[NotMapped]
public ICollection<Appointment> Appointments { get; set; }
[NotMapped]
public ICollection<Payroll> Payrolls { get; set; }
[NotMapped]
public ICollection<PatientReport> PatientReports { get; set; }
}
DoctorRegister.csIdentityUserpublic async Task<IActionResult> OnPostAsync(string returnUrl = null) {
returnUrl ??= Url.Content("~/");
ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
if (ModelState.IsValid)
{
var user = CreateUser();
await _userStore.SetUserNameAsync(user, Input.Email, CancellationToken.None);
await _emailStore.SetEmailAsync(user, Input.Email, CancellationToken.None);
user.Name = Input.Name;
user.Address = Input.Address;
user.Nationality = Input.Nationality;
user.DOB = Input.DOB;
user.Gender = Input.Gender;
user.IsDoctor = Input.IsDoctor;
user.Specialist = Input.Specialist;
ImageOpertaions image = new ImageOpertaions(_env);
string filename = image.ImageUpload(Input.PictureUrl);
user.PictureUrl = filename;
var result = await _userManager.CreateAsync(user, Input.Password);
if (result.Succeeded)
{
_logger.LogInformation("User created a new account with password.");
await _userManager.AddToRoleAsync(user, WebsiteRoles.Website_Doctor);
var userId = await _userManager.GetUserIdAsync(user);
//var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
//code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));
//var callbackUrl = Url.Page(
// "/Account/ConfirmEmail",
// pageHandler: null,
// values: new { area = "Identity", userId = userId, code = code, returnUrl = returnUrl },
// protocol: Request.Scheme);
//await _emailSender.SendEmailAsync(Input.Email, "Confirm your email",
// $"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(callbackUrl)}'>clicking here</a>.");
if (_userManager.Options.SignIn.RequireConfirmedAccount)
{
return RedirectToPage("RegisterConfirmation", new { email = Input.Email, returnUrl = returnUrl });
}
else
{
await _signInManager.SignInAsync(user, isPersistent: false);
return LocalRedirect(returnUrl);
}
}
foreach (var error in result.Errors)
{
ModelState.AddModelError(string.Empty, error.Description);
}
}
// If we got this far, something failed, redisplay form
return Page();
}
创建用户方法：
private ApplicationUser CreateUser()
{
try
{
return Activator.CreateInstance<ApplicationUser>();
}
catch
{
throw new InvalidOperationException($"Can't create an instance of '{nameof(IdentityUser)}'. " +
$"Ensure that '{nameof(IdentityUser)}' is not an abstract class and has a parameterless constructor, or alternatively " +
$"override the register page in /Areas/Identity/Pages/Account/Register.cshtml");
}
}
当我调试代码时，它在此行之后抛出错误
var result = await _userManager.CreateAsync(user, Input.Password);
我打算尝试使用外键向数据库中插入一行数据，但是当我提交数据 FOREIGN KEY 约束 Id 时出现错误
我硬编码的数据库中已存在一条记录
我只是将此属性添加到我的 ApplicationUser 中。
公共int？部门 ID { 获取；放; }
我将这些内容添加到我的 AppDbContext.cs 文件中 protected override void OnModelCreating(ModelBuilder modelBuilder) { base.OnModelCreating(modelBuilder);
// Configure the relationship between ApplicationUser and Department
modelBuilder.Entity<ApplicationUser>()
.HasOne(u => u.Department)
.WithMany()
.HasForeignKey(u => u.DepartmentId);
modelBuilder.Entity<ApplicationUser>()
.Property(u => u.DepartmentId)
.ValueGeneratedOnAdd();
}
它的工作完美地创建了用户，数据也显示在 SQL 表中，我不知道它是如何通过在 ApplicationUser I 中实现新的 DepartmentId 属性来工作的。
但是我还有一个问题，那就是在 ApplicationUser 中实现新的 DepartmentId 属性，然后它是如何工作的......