我们如何在 asp.net 身份 MVC 项目中添加外键

Question

ApplicationUser 类继承 IdentityUser

public class ApplicationUser : IdentityUser
{

    public DateTime BirthDate { get; set; }
    public string User_type { get; set; }
    public DateTime CreatedOn { get; set; }
    public Enums.Sex Gender { get; set; }
    public bool IsActive { get; set; }
    public virtual Patient Patients { get; set; }
    public int PatientID { get; set; }

}

病人分类

public class Patient
{
    [Key]
    public int PatientID { get; set; }
    public string ProfilePicture { get; set; }
    public string FName { get; set; }
    public DateTime BirthDate { get; set;}
    public string City { get; set; }
    public string Country { get; set; }

}

控制器

 public async Task<ActionResult> RegisterPatient(RegisterViewModel model)
    {

        MYDb db = new MYDb();
        Patient pt = new Patient();
        pt.BirthDate = model.BirthDate;
        pt.City = model.City;
        pt.Country = model.Country;
        pt.ProfilePicture = model.ProfilePicture;
        pt.FName = model.FName;
        int Pat_id = model.PatientID;
        if (ModelState.IsValid)
        { 
            ApplicationUser myuser = new ApplicationUser();
            model.CreatedOn = DateTime.Now;
            model.IsActive = true;
            myuser.PatientID = Pat_id;
            if (ModelState.IsValid)
            {
                var user = model.GetUser();
                db.Patients.Add(pt);
                db.SaveChanges();
                var result = await UserManager.CreateAsync(user, model.Password);
                if (result.Succeeded)
                { 
                    var idManager = new IdentityManager();
                    idManager.AddUserToRole(user.Id, model.User_type);
                    //await db.SaveChangesAsync();
                    await SignInAsync(user, isPersistent: false);
                    return RedirectToAction("Index", "Home");
                }
                else
                {
                    AddErrors(result);
                }
            }

            return RedirectToAction("Index", "Home");
        }

        // If we got this far, something failed, redisplay form
        return View();
    }

我想首先建立 b/w Patient 和 ApplicationUser 的关系 在患者中添加记录，然后将“Patient_ID”用作外键 ApplicationUser 表，但是当添加数据时我面临这种类型的错误

错误

注意：数据保存在 Patient 表中，但不保存在 ApplicationUser 表中，因为 ApplicationUser 没有得到“PatientID”，因此在数据库中发生了冲突。

我希望这很清楚并且不容易解决:(

Answer 1

在应用程序用户模型中写这个：

public class ApplicationUser : IdentityUser
{
    public DateTime BirthDate { get; set; }
    public string User_type { get; set; }
    public DateTime CreatedOn { get; set; }
    public Enums.Sex Gender { get; set; }
    public bool IsActive { get; set; }
    [ForeignKey("PatientID")] 
    public virtual Patient Patients{ get; set; }
}

我认为它会起作用。