c# - Entity Framework 代码优先一对零关系

Question

我正在尝试在表员工和部门之间建立一对零的关系。

public class Staff
{
    public int ID { get; set; }

    // other fields

    [ForeignKey("DepartmentID")]
    public int DepartmentID { get; set; }

    public virtual Department Department { get; set; }
}

public class Department
{
    [Key]
    public int ID { get; set; }
    public string Name { get; set; }

    public virtual Staff Staff{ get; set; }
}

当我运行这段代码时，它给出了这个错误:

The property 'DepartmentID' cannot be configured as a navigation property. The property must be a valid entity type and the property should have a non-abstract getter and setter. For collection properties the type must implement ICollection where T is a valid entity type.

Answer 1

像这样改变你的模型，现在你可以使用 DepartmentID 作为外键

public class Department
{
    [Key]
    public int DepartmentID { get; set; }
    public string Name { get; set; }

    public virtual Staff Staff{ get; set; }
}