如何添加ASP.Net MVC 5 Identity的外键引用？

Question

我有一个使用ASP.Net Identity的新ASP.NET MVC 5.1项目.这似乎是可靠和有希望的,但今天如果使用SQL,我花了将近9个小时做一些简单的事情.

我的问题是,我不能通过CodeFirst创建一个表,使用外键引用默认的AspNetUsers表.

例如:我创建了一个名为 - Address的表

   public class Address
    {
        [Key]
        public string UserId { get; set; }
        public string MyAddress { get; set; }
    }

但是我如何创建AspNetUsers的外键引用？

我尝试替换上面的属性

public IdentityUser MyAddress { get; set; }
// Or
public virtual IdentityUser MyAddress { get; set; }
// Or
public virtual ApplicationUser MyAddress { get; set; }

但他们都仍然显示错误:

One or more validation errors were detected during model generation:

MiaPos.Models.IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType. 
MiaPos.Models.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType. 
IdentityUserLogins: EntityType: EntitySet 'IdentityUserLogins' is based on type 'IdentityUserLogin' that has no keys defined. 
IdentityUserRoles: EntityType: EntitySet 'IdentityUserRoles' is based on type 'IdentityUserRole' that has no keys defined.

我也尝试从这篇文章中覆盖OnModelCreating

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
    modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
    modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });
}

但是,当我运行Add-Migration时,它会创建IdentityUserLogin,IdentityRole,IdentityUserRole表并将其复制,只是前缀不同.(ASPNET < - >身份)

最后我用SQL在10秒内完成,但我只是想知道为什么我不能在CodeFirst中做到？为什么从Microsoft 2014新技术那么难以做到这样的事情.

Answer 1

你可以这样做.因为有时你可能需要1-1连接

 public class AnotherTable
    {
        [Key]
        public string UserId { get; set; }

        [ForeignKey("UserId")]
        public virtual ApplicationUser User { get; set; }
    }

Answer 2

感谢GáborPlesz的评论.

我找到了解决方案.

继承IdentityUser(创建AspNetUsers表)的ApplicationUser类应该创建子类(子表)的ICollection属性.

例如

public virtual ICollection<ToDo> ToDoes { get; set; }

所以ToDo类可以引用 ApplicationUser

强烈推荐看看GáborPlesz所说的样本.