Question

我想在MVC中的Personal表和User表之间设置一对一或一对零的关系。这是我个人的班级代码：

 public class Personal
{
 #region Configuration
    internal class Configuration : System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<Personal>
    {
        public Configuration()
        {   
            HasRequired(current => current.ApplicationUser)
                .WithOptional(user => user.PersonalU)
                .WillCascadeOnDelete(true);
        }
    }
    #endregion Configuration
public string UserName { get; set; }
    [Key,ForeignKey("ApplicationUserID")]
    public string ApplicationUserID { get; set; }
    public virtual ApplicationUser ApplicationUser { get; set; }
}

这是ApplicationUser代码：

  public class ApplicationUser : IdentityUser
{
public virtual Personal PersonalU { get; set; }
    public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
    {
        var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
        return userIdentity;
    }
}

但是当我使用Personal表添加控制器时，错误“不支持每种类型的多个对象集。对象集'ApplicationUsers'和'Users'都可以包含'WebApplication1.Models.ApplicationUser'类型的实例。”完了。

Answer 1

而不是

[Key,ForeignKey("ApplicationUserID")]
public string ApplicationUserID { get; set; }
public virtual ApplicationUser ApplicationUser { get; set; }

设置此

public string ApplicationUserID { get; set; }
[ForeignKey("ApplicationUserID")]
public virtual ApplicationUser ApplicationUser { get; set; }

Answer 2

我猜你是想明确地将ApplicationUser放在DbContext中，但你的DbContext可能会继承IdentityDbContext已经有一个数据库集IdentityUser。

不要这样做：

public class MyAwesomeContext : IdentityDbContext<ApplicationUser>
{
    public DbSet<ApplicationUser> ApplicationUsers { get; set; } // this shouldn't exist 
    public DbSet<Personal> Personals { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new Configuration());
    }
}

我建议将Configuration重命名为PersonalConfiguration或其他内容，否则有人会认为它来自迁移的配置。

由于IdentityDbContext<>已经为DbSet中指定的TUser类型声明了IdentityDbContext，因此您只需忽略ApplicationUser数据库集，如下所示：

public class MyAwesomeContext : IdentityDbContext<ApplicationUser>
{
    public DbSet<Personal> Personals { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder); // don't forget this...
        modelBuilder.Configurations.Add(new Configuration());
    }
}

确保将ApplicationUser置于IdentityDbContext<>通用类型内。

此外，您的Personal课程必须定义一个键，您可以在EntityTypeConfiguration中执行此操作：

internal class Configuration : System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<Personal>
{
    public Configuration()
    {
        HasKey(p => p.ApplicationUserID);

        HasRequired(current => current.ApplicationUser)
            .WithOptional(user => user.PersonalU)
            .WillCascadeOnDelete(true);
    }
}

...并从您的班级中移除[Key,ForeignKey("ApplicationUserID")]，因为您已经在使用流利的api 。

Answer 3

尝试使用EF 6.0实现这一目标 - 检查是否有用

public class Personal
    {
        public string UserName { get; set; }

        public string ApplicationUserID { get; set; }

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


public class ApplicationUser : IdentityUser
    {
        [Key]
        public string ApplicationUserID { get; set; }
        public virtual Personal PersonalU { get; set; }
    }


protected override void OnModelCreating(DbModelBuilder builder)
        {
            builder.Entity<Personal>()
                .HasKey(m => m.ApplicationUserID);

                builder.Entity<ApplicationUser>()
                .HasRequired(current => current.PersonalU)
                .WithOptional(user => user.ApplicationUser)
                .WillCascadeOnDelete(true);
}

使用ApplicationUser表在mvc和实体框架中一对一或一对零关系

3 个答案: