多个HasMany关系中表的Fluent NHibernate映射
下面的类映射有什么问题多个HasMany关系中表的Fluent NHibernate映射,nhibernate,fluent-nhibernate,nhibernate-mapping,Nhibernate,Fluent Nhibernate,Nhibernate Mapping,下面的类映射有什么问题 public class Foo { public Foo() { ActualCurve = new List<Point>(); TargetCurve = new List<Point>(); } public virtual int Id { get; set; } public virtual string Name { get; set; } public
public class Foo
{
public Foo()
{
ActualCurve = new List<Point>();
TargetCurve = new List<Point>();
}
public virtual int Id { get; set; }
public virtual string Name { get; set; }
public virtual IList<Point> ActualCurve { get; set; }
public virtual IList<Point> TargetCurve { get; set; }
}
public class Point
{
public virtual int Id { get; set; }
public virtual double X { get; set; }
public virtual double Y { get; set; }
}
public class FooMapping() : ClassMap<Foo>
{
Table("Foos");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Name).Not.Nullable();
HasMany(x => x.ActualCurve ).Cascade.All();
HasMany(x => x.TargetCurve ).Cascade.All();
}
public class PointMapping() : ClassMap<Point>
{
Table("Points");
Not.LazyLoad();
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.X).Not.Nullable();
Map(x => x.Y).Not.Nullable();
}
本质上,问题在于,当我将持久化的Foo对象从数据库中拉回来时,Foo.ActualCurve和Foo.TargetCurve列表都会被这两个列表的组合内容填充。很明显,没有一列可以确定哪些点集属于Foo中的正确曲线,但我不确定如何更改映射以保持两个不同的点集。我认为您需要为引用指定一个单独的列:
HasMany(x => x.ActualCurve ).Cascade.All().KeyColumn("ActualCurveId");
HasMany(x => x.TargetCurve ).Cascade.All().KeyColumn("TargetCurveId");
EDIT:Column->KeyColumn不是您不必将表映射到类的要点。为什么不使用内置功能?
HasMany(x => x.ActualCurve ).Cascade.All().KeyColumn("ActualCurveId");
HasMany(x => x.TargetCurve ).Cascade.All().KeyColumn("TargetCurveId");