像sJhonny说,这听起来真的如继承,这将使
class First
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
}
class Second : First
{
public virtual int Number { get; set; }
}
class FirstMap : ClassMap<First>
{
public FirstMap()
{
Id(f => f.Id).GeneratedBy.HiLo("100");
Map(f => f.Name);
}
}
class SecondMap : SubclassMap<Second>
{
public SecondMap()
{
KeyColumn("Id");
Map(s => s.Number);
}
}
,但您的情况也是可以的,但是你需要额外的工作,它不是那么好代码后
class SecondMap : ClassMap<Second>
{
public SecondMap()
{
CompositeId()
.KeyReference(f => f.First, "Id");
Map(s => s.Number);
}
}
class Second
{
public virtual First First {get; set;}
public virtual int Number { get; set; }
// required for Compositekeys
public override bool Equals(object obj)
{
var other = obj as Second;
return (other != null) && (First.Id == other.First.Id) ;
}
// required for Compositekeys
public override int GetHashCode()
{
return First.Id.GetHashCode();
}
}
在那么,你会说'Second' *是一种* First?吗?意义 - 就像'员工'是一种'人',或'经理人'是一种'员工'。如果是这样 - 你会想使用继承。 –