实体框架将实体映射到自身

Question

我有一个实体需要包含自己的相关实体：

public class Period
{
public int ID {get; set;}
public DateTime StartDate {get; set;}
public DateTime EndDate {get; set;}  
public Period PriorPeriod {get; set;}  

}

如何仅使用POCO实现此目的，还是需要Fluent API映射？

Answer 1

public class Period
{
    public int ID { get; set; }
    public int? PriorPeriodID { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }

    [ForeignKey("PriorPeriodID")]
    public Period PriorPeriod { get; set; }
}