我的案例中EF中最适合的继承类型是什么？

Question

i have the flowing classes:

public abstract class Person
{
    //...
    public DateTime CteatedAt{get;set;}
    public DateTime UpdatedAt{get;set;}
    // ....
}

public class Employee : Person
{
    // ...
    public DateTime CreatedAt{get;set;}
    public DateTime UpdatedAt{get;set;}
    // ...
}

and i want the database tables to be looks like: - People table:(id,...,createdat, updatedat); - Employee table:(id, ..., createdat, updatedat);

and in the code, when i need the person creation date i will do: Employee em ; datetime pcd = (Person)em.CreatedAt; and when i need employee creation date: datetime ecd = em.CreatedAt;

please what is the fittest inheritance type for my case?

Answer 1

I think the way you're going is too complicated. If I understand you right - you need to separate PersonCreateDate and EmployeeCreateDate .

public class Person
{
    public DateTime CreateDate {get;set;}
}

public class Employee
{
    public DateTime CreateDate {get;set;}
    public virtual Person BasedOnPerson {get;set;}
}

In database, Employee must have a foreign key to Person .