實體框架代碼優先設置的外鍵和同一表中的主鍵

Question

我有從SysModelBase繼承的WdUser類：

[Serializable]
public class WdUser : SysDomainModelBase, IWdUser
{
    [Display(Name = "UserName")]
    [MaxLength(25)]
    [Required]
    public string UserName { get; set; }

    [Required]
    [Index(IsUnique = true)]
    [MaxLength(25)]
    [Display(Name = "LoginName ")]
    public string LoginName { get; set; }

    [Display(Name = "Password ")]
    [MaxLength(50)]
    [Required]
    [DataType(DataType.Password)]
    public string Password { get; set; }

    [Display(Name = "Email 地址")]
    [DataType(DataType.EmailAddress)]
    [MaxLength(50)]
    public string Email { get; set; }

    [Display(Name = "Telephone ")]
    [DataType(DataType.PhoneNumber)]
    [MaxLength(15)]
    public string Telephone { get; set; }

    [Display(Name = "LastLoginDateTime ")]
    [DataType(DataType.DateTime)]
    public DateTime LastLoginDateTime { get; set; }

    [Required]
    [Display(Name = "UserStatus ")]
    public UserStatus Status { get; set; }

    [Display(Name = "Roles ")]
    public List<WdRole> Roles { get; set; }

    public bool IsInRole(string role) => Roles.Any(item => item.RoleName == role);

    [NotMapped]
    public IIdentity Identity { get; set; }
}

SysModelBase是什么樣的

[Serializable]
public class SysModelBase : ModelBase, ISysModel
{
    [JsonIgnore]
    [DataType(DataType.DateTime)]
    public DateTime CreateDateTime { get; set; }

    [JsonIgnore]
    public WdUser CreateUser { get; set; }

    [JsonIgnore]
    [DataType(DataType.DateTime)]
    public DateTime LastUpdateDateTime { get; set; }

    [JsonIgnore]
    public WdUser LastUpdateUser { get; set; }

    [JsonIgnore]
    public bool IsDeleted { get; set; }

    public bool IsEnabled { get; set; }
}

運行此代碼時，出現錯誤：

無法確定類型“ SHWDTech.Platform.Model.Model.WdUser”和“ SHWDTech.Platform.Model.Model.WdUser”之間的關聯的主要終點。 必須使用關系流利的API或數據注釋顯式配置此關聯的主要端。

我應該如何設置與WdUser類的關系？

我不知道如何將同一表中的主鍵設置為其他鍵作為外鍵。

Answer 1

例如

public class WdUser : SysDomainModelBase, IWdUser
{
//This is your primary key of WDUser
public int UserID{get;set;}
//This is for your foreign key mapping
public virtual WDUser WDUser{get;set;}
public virtual  ICollection<WDUser> WDUserList{get;set;}
}

就這樣

Answer 2

您需要2個外鍵的答案

public class WdUser : SysDomainModelBase, IWdUser
{
//This is your primary key of WDUser
public int UserID{get;set;}
//This is for your 1st foreign key mapping
public virtual WDUser WDUser{get;set;}
public virtual  ICollection<WDUser> WDUserList{get;set;}
public int fk1{get;set;}
//This is for your 2nd foreign key mapping
public virtual  ICollection<WDUser> WDUserList1{get;set;}
public int fk2{get;set;}
}

您的流利的api將是

//mapping for 1st foreign key
     dbModelBuilder.Entity<WDUser>()
                        .HasKey(wdUser=> wdUser.Id)
                        .HasRequired<Tasks>(wdUser => wdUser.WDUser)
                        .WithMany(s => s.WDUserList)
                        .HasForeignKey(s => .fk1).WillCascadeOnDelete(false); 



    //mapping for 2st foreign key
 dbModelBuilder.Entity<WDUser>()
                    .HasKey(wdUser=> wdUser.Id)
                    .HasRequired<Tasks>(wdUser => wdUser.WDUser)
                    .WithMany(s => s.WDUserList1)
                    .HasForeignKey(s => .fk2).WillCascadeOnDelete(false);