c# - MVC5 EF6 种子方法 : Cannot insert NULL into column 'Id' table AspNetUsers

Question

Entity Framework 6、MVC5、ASP Identity 2.0。

我按照这 2 个教程创建了 Web 应用程序的登录部分:part 1 - part 2

我从另一个库项目中的 IdentityUser 类创建了自己的 AppUser 类。我也有来自 IdentityDbContext 的数据上下文

    public class DataContext: IdentityDbContext<AppUser>
    {
       public DataContext(): base("DefaultConnection") { }

       protected override void OnModelCreating(DbModelBuilder modelBuilder)
       {
           modelBuilder.Entity<AppUser>().Property(u => u.Id).HasDatabaseGeneratedOption(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity);
           base.OnModelCreating(modelBuilder);
      }
    }

public class AppUser : IdentityUser
{
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    [Key]
    public override string Id { get; set; }

    [Required]
    [Display(Name ="First Name")]
    [MaxLength(100)]
    public string FirstName { get; set; }

    [Required]
    [Display(Name = "Last Name")]
    [MaxLength(100)]
    public string LastName { get; set; }

    [MaxLength(100)]
    public string Title { get; set; }

    [Required(ErrorMessage = "Email is required.")]
    [Display(Description = "Email")]
    public override string Email { get; set; }

    [MaxLength(20)]
    public string Phone { get; set; }

    [Range(0,9999)]
    [Display(Name = "Extension")]
    public int PhoneExtension { get; set; }

    [Display(Name = "Active")]
    [DefaultValue(true)]
    public bool IsActive { get; set; }
}

当我运行种子方法时，出现以下错误

System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'Id', table 'CRM1.dbo.AspNetUsers'; column does not allow nulls. INSERT fails. The statement has been terminated.

播种方法如下:

protected override void Seed(CRM.DAL.Data.DataContext context)
    {
        context.AccessLevels.AddOrUpdate(al => al.Label,
            new Model.AccessLevel { AccessLevelID = 1, Label = "Admin", Description = "Full access to the CRM data" },
            new Model.AccessLevel { AccessLevelID = 2, Label = "Customer Service", Description = "Full access to the CRM data" },
            new Model.AccessLevel { AccessLevelID = 3, Label = "Sales", Description = "Full access to the CRM data" }
            );

        if (!(context.Users.Any(u => u.UserName == "admin@admin.com")))
        {
            var userStore = new UserStore<AppUser>(context);
            var userManager = new UserManager<AppUser>(userStore);
            var userToInsert = new AppUser
            {
                Id = "1",
                FirstName = "Admin",
                LastName = "Admin",
                Title = "Administrator",
                Email = "admin@admin.com",
                PhoneExtension = 0,
                IsActive = true,
                AccessLevelID = 1,
                EmailConfirmed = true,
                PhoneNumberConfirmed = true,
                TwoFactorEnabled = false,
                LockoutEnabled = false,
                AccessFailedCount = 0,
                UserName = "admin"
            };
            userManager.Create(userToInsert, "password");
        }

    }

所以 Id 得到一个值，但 EF 说它正在插入 NULL。我尝试过不给 Id 任何值，认为 EF 会自动执行它但没有。

用我的上下文为 AspNetUser 播种的方法是什么？我看到了不同的教程，但它不适用于我的扩展 AppUser 类和 DataContext。

谢谢

Answer 1

下面的事情发生在我身上。我按照本指南将 ASP.NET Identity 中用户的主键从 Guid 更改为 Int。

https://learn.microsoft.com/en-us/aspnet/identity/overview/extensibility/change-primary-key-for-users-in-aspnet-identity

我已经进行了一些迁移，因此 EF 尝试将 Id 从 nvarchar(128) 更改为 int。这行得通，但 Identity Specification 从未从“否”变为"is"。通过删除所有以前的迁移，删除数据库然后为所有更改进行新迁移来解决它。由于我们处于早期开发阶段，这不是问题。