Question

我正在使用EF Core 2.2 错误代码

var ClientCase= _context.Client_Cases.Include(a=>a.Case_Sessions). FirstOrDefault(x => x.Id == id);

错误

System.Data.SqlClient.SqlException：'无效的列名 “ Client_CaseId”。无效的列名“ Case_LevelId”。无效的栏名称“ Client_CaseId”。无效的列名“ Court_CircleId”。无效列名称“ Court_HallId”。

实体

1-父Client_Case

public class Client_Cases
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public long Id { get; set; }        
    public string Opponent { get; set; }
    public DateTime? StartDate { get; set; }
    public DateTime Recieve_Date { get; set; }
    [ForeignKey("Clients")]
    public long? ClientID { get;set;}
    public Clients Client { get; set; }
    [ForeignKey("Case_Levels")]
    public long? LevelID { get; set; }
    public virtual Case_Levels Case_Levels { get; set; }
    [ForeignKey("Case_Types")]
    public long? TypeID { get; set; }
    public virtual Case_Types Case_Types { get; set; }
    [ForeignKey("Court_Circles")]
    public long? CircleID { get; set; }
    public virtual Court_Circles Court_Circles { get; set; }
    [ForeignKey("Court_Halls")]
    public long? HallID { get; set; }
    public virtual Court_Halls Court_Halls { get; set; }
    [ForeignKey("Courts")]
    public long? CourtID { get; set; }
    public virtual Courts Court { get; set; }
    [ForeignKey("Case_Status")]
    public long? StatusID { get; set; }
    public Case_Status Case_Status { get; set; }
    [ForeignKey("Lawyers")]
    public long? LawyerID { get; set; }
    public virtual LawyersData Lawyers { get; set; }
    public string Description { get; set; }
    public string Code { get; set; }
    public string CaseNo { get; set; }
    public List<Case_Sessions> Case_Sessions { get; set; }
}

详细实体案例会话

public class Case_Sessions
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public long Id { get; set; }        
    [ForeignKey("Client_Cases")]
    public long? CaseID { get;set;}
    public Client_Cases Client_Case { get; set; }
    [ForeignKey("Case_Levels")]
    public long? LevelID { get; set; }
    public Case_Levels Case_Level { get; set; }
    [ForeignKey("Court_Circles")]
    public long? CircleID { get; set; }
    public Court_Circles Court_Circle { get; set; }
    [ForeignKey("Court_Halls")]
    public long? HallID { get; set; }
    public Court_Halls Court_Hall { get; set; }
    [ForeignKey("Case_Status")]
    public long? StatusID { get; set; }
    public Case_Status Case_Status { get; set; }
    public DateTime Session_Date { get; set; }
    public string Judge_Name { get; set; }
    public string Session_Result { get; set; }
    public string Notes { get; set; }
}

如果我的父母没有包括孩子，那它会起作用如果我知道它的细节

我知道EF Core为外键创建自己的命名约定的错误但我认为外键标签会覆盖该命名约定

现在我错了吗？

谢谢

Answer 1

[ForeignKey（“”）]是什么意思？命名您在课堂上添加的属性以成为外键。例如：

public long? CaseID { get;set;}
[ForeignKey("CaseID")]
public Client_Cases Client_Case { get; set; }

public long? CircleID { get; set; }
[ForeignKey("CircleID")]
public Court_Circles Court_Circle { get; set; }

您可以使用上面的注释，在您的情况下，需要以下更正：

[ForeignKey("Client")] // it should be [ForeignKey("Client")] not an extra s if you using entities name in annotation.
    public long? ClientID { get;set;}
    public Clients Client { get; set; }

这应该是您与律师的关系

[ForeignKey("Lawyers")]
    public long? LawyersID { get; set; }
    public virtual LawyersData Lawyers { get; set; }

我假设LawyersData表中的主键类型很长？

EF核心无效列名称（外键）

1 个答案: