INSERT语句与FOREIGN KEY约束错误冲突

Question

Hi I'm getting this error

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.

I'm using Entity Framework and MVC 5's IdentityUser so I'm really lost on what I'm doing :|

This is what I'm trying to populate:

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; }
}

The way I see it, the Contact is being created before the User is even made. I don't know why this happens, since when not using IdentityUser this code populates it just fine.

Now this is the Register method:

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

You are probably trying to access or insert using a non-existent foreign key. Go to your dbo.Contacts Table and look for the record with that key. You'll find no record with that key in the table. You need to create a record with that key or use another (existent) key.

Answer 2

If you are creating the FK obect as well than you should first store it and retrieve its ID, failing todo so will cause the FK_Key to fail as you have no FK value.

Walter

Answer 3

如果您希望可以允许引用不存在的记录

Sql("ALTER TABLE dbo.Users NOCHECK CONSTRAINT [FK_dbo.Users_dbo.Roles_RoleID]");