创建实体模型多对多 CodeFirst Ef6

Question

我希望 Db 使用代码优先

我做了什么：

    public class Responses
    {
        public int UserId { get; set; }
        public virtual AppUser AppUser { get; set; }

        public int QuestionId { get; set; } 
        public virtual Question Question { get; set; }

        public string Answer { get; set; }

    }
       
    public class Question
    {
        public int idQuestion { get; set; }
        public string TextQuestion { get; set; }
        public ICollection<Responses> Responses  { get; set; }
    }

    public class AppUser : IdentityUser<int, AppUserLogin, AppUserRole, IdentityUserClaimBase>, ICRMRepository, IEditableEntity, IEntityBase
    {
        public int idUser {get;set;}
        public ICollection<Responses> Responses { get; set; }

    }

接下来我转到 DbContext：

modelBuilder.Entity<Responses>()
                .HasKey(x => new {x.UserId, x.QuestionId});

            modelBuilder.Entity<Responses>()
                .HasOne(x=>x.User)

无法解析符号“HasOne”

如果我想得到这样的数据库，我应该怎么做？

如何配置我与流利 API 的关联？或者有没有更好的方法来创建关联 table?

更新

Answer 1

更改响应 class，将 AppUser 属性替换为用户

public class Responses
    {
        public int UserId { get; set; }
        public virtual AppUser User{ get; set; }

       ........

    }

并将此代码用于 Db 上下文

modelBuilder.Entity<Response>(entity =>
{
 entity.HasOne(d => User)
  .WithMany(p => p.Responses)
  .HasForeignKey(d => d.UserId);

 entity.HasOne(d => d.Question)
 .WithMany(p => p.Responses)
   .HasForeignKey(d => d.QuestionId;
});

Answer 2

我能解决：

public class AppUser : IdentityUser<int, AppUserLogin, AppUserRole, IdentityUserClaimBase>, ICRMRepository, IEditableEntity, IEntityBase
{
    public ICollection<Response> Responses { get; set; } 
}

public class Question
{
    public int Id { get; set; }
    public string TextQuestion { get; set; }
    public ICollection<Response> Responses  { get; set; }
}

public class Response
{
    public int Id { get; set; }
    ***public int AppUserId { get; set; }***
    public int QuestionId { get; set; }
    
    public virtual AppUser AppUser { get; set; }
    public virtual Question Question { get; set; }

    public string Answer { get; set; }
}

数据库上下文：

public DbSet<Question> Questions { get; set; }
public DbSet<Response> Responses { get; set; }

EF6明白我想要什么

创建实体模型多对多 CodeFirst Ef6

Create entity model Many-To-Many CodeFirst Ef6

c#

asp.net-mvc

entity-framework

ef-code-first