Question

我有两个POCO课程雇员

public class Employee
{
    public Employee()
    {
     Departments = new HashSet<Department>();
    }

[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int EmployeeId { get; set; }

public String EmployeeName { get; set; }

public int DeptId { get; set; }

[ForeignKey("DeptId")]
public  ICollection<Department> Departments { get; set; }

}

系类

public class Department
    {      
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int DepartmentId { get; set; }
        public String Name { get; set; }
        public ICollection<Employee> Employees { get; set; }
     }

我想在Emp-Department中将外键命名为默认EF命名约定以外的一对多关系。所以我使用了ForeignKey中的Employee属性。但我得到了例外

类型Employee上属性Departments的外键属性不是有效

帮我找出命名外键的方法。

Answer 1

如果Employee有一个指向Department的外键属性，那么Employee不能有多个Departments。因此，将导航属性更改为：

[ForeignKey("DeptId")]
public virtual Department Department { get; set; }

在EF 6中尝试使用一对多关系时，外键属性无效

1 个答案: