c# - 不支持每种类型的多个对象集。对象集 IdentityUsers' 和 Users 都可以包含类型的实例

Question

对象集IdentityUsers'和Users都可以包含net类型的实例

但我尝试创建多对多关系，如本教程所示 getting-started-with-ef-using-mvc

但是我得到了这个错误=> 不支持每种类型的多个对象集。对象集“IdentityUsers”和“Users”都可以包含“bugs_b_gone.Models.ApplicationUser”类型的实例。

我在项目类中有一个属性，所以创建项目的用户是管理员 但是现在管理员必须创建用户并将其分配给项目

public class Project
{
    [Key]
    public int ProjectID { get; set; }
    //public int AdminID { get; set; }
    [Required]
    [StringLength(50, ErrorMessage = "Title cannot be longer than 50 characters.")]
    [Column("Title")]
    [Display(Name = "Title")]
    public string Title { get; set; }
    [Required]
    public string Description { get; set; }


    //public int MemberID { get; set; }

    //public virtual ApplicationUser User { get; set; }

    public virtual ICollection<Bug> Bugs { get; set; }

    // veel op veel
    public virtual ICollection<ApplicationUser> User { get; set; }
}

现在是 IdentityModel.cs

public class ApplicationUser : IdentityUser
{
    public virtual ICollection<Project> Projects { get; set; }
    public virtual ICollection<Bug> Bugs { get; set; }
    public virtual ICollection<Comment> Comments { get; set; }
}

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("DefaultConnection")
    {
    }

    public DbSet<Project> Projects { get; set; }
    public DbSet<Bug> Bugs { get; set; }
    public DbSet<Comment> Comments { get; set; }


    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(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 });


        //modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();

        /*  modelBuilder.Entity<AssignedTo>()
          .HasOptional(f => f.AssignedToID)
          .WithRequired(s => s.Bug);*/

        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();

        modelBuilder.Entity<Project>()
            .HasMany(c => c.User).WithMany(i => i.Projects)
            .Map(t => t.MapLeftKey("ProjectID")
                .MapRightKey("Id")
                .ToTable("ProjectUser"));

    }

    public System.Data.Entity.DbSet<bugs_b_gone.Models.ApplicationUser> IdentityUsers { get; set; }
}

Answer 1

你的问题是这一行:

public System.Data.Entity.DbSet<bugs_b_gone.Models.ApplicationUser> IdentityUsers { get; set; }

IdentityDbContext已经包含 Users类型为 IDbSet<ApplicationUser> 的属性.您不需要添加自己的 DbSet对于 ApplicationUser .删除该行就可以了。