c# - INSERT 语句与 FOREIGN KEY 约束错误冲突

Question

您好，我遇到了这个错误

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_dbo.AspNetUsers_dbo.Contacts_ContactID".

The conflict occurred in database "aspnet-COGMakati-20140119015553", table "dbo.Contacts", column 'ContactID'.

The statement has been terminated.

我正在使用 Entity Framework 和 MVC 5 的 IdentityUser，所以我真的迷失了自己在做什么:|

这就是我要填充的内容:

public class User : IdentityUser
{
    [Required]
    [Display(Name = "First Name")]
    public string FirstName { get; set; }

    [Required]
    [Display(Name = "Last Name")]
    public string LastName { get; set; }

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

    public string Birthday { get; set; }
    [Display(Name = "Referred By")]
    public string LifegroupPreference { get; set; }
    [Display(Name = "Civil Status")]
    public string CivilStatus { get; set; }

    public int EducationID { get; set; }
    public int WorkID { get; set; }
    public int ContactID { get; set; }
    public int FamilyID { get; set; }
    public int SpiritualID { get; set; }
    public int GrowthMilestoneID { get; set; }
        
    [ForeignKey("EducationID")]
    public virtual Education Education { get; set; }
    [ForeignKey("WorkID")]
    public virtual Work Work { get; set; }
    [ForeignKey("ContactID")]
    public virtual Contact Contact { get; set; }
    [ForeignKey("FamilyID")]
    public virtual Family Family { get; set; }
    [ForeignKey("SpiritualID")]
    public virtual Spiritual Spiritual { get; set; }
    [ForeignKey("GrowthMilestoneID")]
    public virtual GrowthMilestone GrowthMilestone { get; set; }
}

在我看来，Contact 甚至在创建 User 之前就已创建。我不知道为什么会这样，因为当不使用 IdentityUser 时，这段代码会很好地填充它。

现在这是 Register 方法:

public async Task<ActionResult> Register(RegisterViewModel model)
{
    if (ModelState.IsValid)
    {
        var user = model.GetUser();
        var result = await UserManager.CreateAsync(user, model.Password);
        if (result.Succeeded)
        {
            var idManager = new IdentityManager();
            idManager.AddUserToRole(user.Id, "User");

            await SignInAsync(user, isPersistent: false);
            return RedirectToAction("ViewAllMembers", "Home");
        }
        else
        {
            AddErrors(result);
        }
    }

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

Answer 1

您可能正在尝试使用不存在的外键访问或插入。转到您的 dbo.Contacts 表并查找具有该键的记录。您会在表中找不到包含该键的记录。您需要使用该 key 创建记录或使用另一个(现有) key 。