EF Core 无效列名（外键）

Question

我正在使用 EF Core 2.2 有错误的代码

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

错误

System.Data.SqlClient.SqlException: 'Invalid column name 'Client_CaseId'. Invalid column name 'Case_LevelId'. Invalid column name 'Client_CaseId'. Invalid column name 'Court_CircleId'. Invalid column name 'Court_HallId'.'

实体

1- Parent 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Case_Session

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; }
}

如果我得到 parent 而没有包含 child 它就可以了。
如果我得到详细信息，它就会起作用。

我知道 EF Core 为外键创建自己的命名约定的错误但我认为标签外键覆盖了命名约定

现在我哪里错了？

Answer 1

[ForeignKey("")] 是什么意思？将您在 class 中添加的属性命名为外键。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; }

您可以像上面那样使用注释，在您的情况下，需要进行以下更正：

[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; }

这应该是你的律师关系：

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

我假设 LawyersData table 中的主键类型是长的？

EF Core 无效列名（外键）

EF Core Invalid Column Name (Foreign Keys)

c#

.net-core

ef-core-2.2