导航属性"SenderId"不是"对话"类型的声明属性

Question

当我尝试做Update-Database时,我收到此错误:

导航属性"SenderId"不是"对话"类型的声明属性.验证它是否未从模型中明确排除,并且它是有效的导航属性.

编辑

我认为问题在于对话和用户之间的映射关系,因为对话和用户与两个一对多关系连接,即对话有两个指向用户的外键

以下是用户和对话的连接方式:

用户:

public class User
{
    [Key]
    [HiddenInput(DisplayValue = false)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid UserId { get; set; }

    public virtual ICollection<Conversation> ConversationSenders { get; set; }
    public virtual ICollection<Conversation> ConversationRecievers { get; set; }

会话:

public class Conversation
{
    [Key]
    [HiddenInput(DisplayValue = false)]
    public Guid ConversationId { get; set; }

    [ForeignKey("SenderId")]
    public Guid SenderId { get; set; }

    [ForeignKey("RecieverId")]
    public Guid RecieverId { get; set; }

    [InverseProperty("ConversationSenders")]
    public virtual User Sender { get; set; }

    [InverseProperty("ConversationRecievers")]
    public virtual User Reciever { get; set; }

}

这是完整的代码:

用户:

public class User
{
    [Key]
    [HiddenInput(DisplayValue = false)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid UserId { get; set; }


    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid CollegeId { get; set; }

    public int RoleId { get; set; }

    [Required]
    [DataType(DataType.EmailAddress)]
    public string Email { get; set; }

    [Required]
    [DataType(DataType.Password)]
    public string Password { get; set; }

    [Required]
    public string Name { get; set; }

    [Required]
    public string Surname { get; set; }

    public string Gender { get; set; }

    //role

    public DateTime? DateOfBirth { get; set; }


    public string ImageURL { get; set; }

    [ForeignKey("CollegeId")]
    public virtual College College { get; set; }

    [ForeignKey("RoleId")]
    public virtual UserRole UserRole { get; set; }

    public virtual ICollection<Advert> Adverts { get; set; }
    public virtual ICollection<Competition> Competitions { get; set; }
    public virtual ICollection<Message> Messages { get; set; }
    public virtual ICollection<Conversation> ConversationSenders { get; set; }
    public virtual ICollection<Conversation> ConversationRecievers { get; set; }
    public virtual ICollection<UserOS> UserOses { get; set; }

会话:

public class Conversation
{
    [Key]
    [HiddenInput(DisplayValue = false)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid ConversationId { get; set; }

    [ForeignKey("SenderId")]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid SenderId { get; set; }

    [ForeignKey("RecieverId")]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid RecieverId { get; set; }

    [InverseProperty("ConversationSenders")]
    public virtual User Sender { get; set; }

    [InverseProperty("ConversationRecievers")]
    public virtual User Reciever { get; set; }

    public virtual ICollection<Message> Messages { get; set; }
}

信息

 public class Message
{
    [Key]
    [HiddenInput(DisplayValue = false)]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid MessageId { get; set; }

    [HiddenInput(DisplayValue = false)]
    public Guid UserId { get; set; }

    [HiddenInput(DisplayValue = false)]
    public Guid ConversationId { get; set; }

    public string Text { get; set; }

    public bool? IsSeen { get; set; }


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

    [ForeignKey("ConversationId")]
    public virtual Conversation Conversation { get; set; }
}

Answer 1

最后我找到了解决方案,愚蠢的错误.在保护中它应该是

    [ForeignKey("Sender"), Column(Order = 0)]

    public Guid SenderId { get; set; }

    [ForeignKey("Receiver"), Column(Order = 1)]

    public Guid ReceiverId { get; set; }

并不是

[ForeignKey("SenderId"), Column(Order = 0)]
[ForeignKey("ReceiverId"), Column(Order = 1)]

之后我得到了错误:

"在表'对话'上引入FOREIGN KEY约束'FK_dbo.Conversations_dbo.Users_ReceiverId'可能会导致循环或多个级联路径.指定ON DELETE NO ACTION或ON UPDATE NO ACTION,或修改其他FOREIGN KEY约束.无法创建约束.请参阅上一页错误".

解决方案是:在DbContext中这段代码:

        modelBuilder.Entity<Conversation>()
           .HasRequired(s => s.Sender)
           .WithMany(s => s.ConversationSenders)
           .HasForeignKey(s => s.SenderId)
           .WillCascadeOnDelete(false);


        modelBuilder.Entity<Conversation>()
            .HasRequired(r => r.Receiver)
            .WithMany(r => r.ConversationReceivers)
            .HasForeignKey(r => r.ReceiverId)
            .WillCascadeOnDelete(false);

我已经测试过,现在一切正常=)