Question

所以我遇到此错误：

"ExceptionMessage": "42703: column Extent1.Employee_mavnr does not exist"

，经过一些Google搜索，我仍然找不到确切的问题。我发现的大多数解释都与列名有关，我现在已经对其进行了几次更改，但仍然无法正常工作。

我的数据库如下

CREATE TABLE tbl_process
(
  id integer NOT NULL DEFAULT nextval('"Process_Id_seq"'::regclass),
  name text,
  description text,
  submitter text,
  created date,
  CONSTRAINT "PrimaryKey-ID" PRIMARY KEY (id)
)
CREATE TABLE v_employee
(
  mavnr text NOT NULL, -- Mitarbeiter Nummer
  vorname text,
  nachname text,
  abt text,
  email text,
  del boolean,
  CONSTRAINT employee_pkey PRIMARY KEY (mavnr)
)

我当前生成此错误的模型如下：

 [Table("tbl_process", Schema = "public")]
    public class Process
    {
        [Key]
        public int id { get; set; }

        public string name { get; set; }

        public string description { get; set; }

        public DateTime created { get; set; }

        public string submitter { get; set; }

        public virtual Employee Employee { get; set; }
    }


    [Table("v_employee", Schema = "public")]
    public class Employee
    {
        [Key]
        public string mavnr { get; set; }

        public string vorname { get; set; }

        public string nachname { get; set; }

        public string abt { get; set; }

        public string email { get; set; }

        public bool del { get; set; }
    }

对员工的请求无误运行，只有过程表出错。我希望有人明白这是怎么回事。

非常感谢您的帮助

编辑：

流程表中的“提交者”列应链接到“员工”表中的mavnr

Answer 1

正如@DavidG在上面的评论中所说，您具有导航属性，但没有用于该导航的外键属性。

您需要添加FK属性并使用[ForeignKey（“ keyname”）]属性标记导航属性：

[Table("tbl_process", Schema = "public")]
public class Process
{
    [Key]
    public int id { get; set; }

    public string name { get; set; }

    public string description { get; set; }

    public DateTime created { get; set; }

    public string submitter { get; set; }

    public string mavnr { get; set; } // <-- add this foreign key

    [ForeignKey("mavnr")] // <-- decorate the navigation property like this (or is "submitter" your FK?)
    public virtual Employee Employee { get; set; }
}


[Table("v_employee", Schema = "public")]
public class Employee
{
    [Key]
    public string mavnr { get; set; }

    public string vorname { get; set; }

    public string nachname { get; set; }

    public string abt { get; set; }

    public string email { get; set; }

    public bool del { get; set; }
}

EntityFramework6-错误42703：未找到列Extent1 ...

1 个答案: