NHibernate的组由parentId的，并从父表中的值这个parentId的

Question

我有一个表头和明细之间有许多如在下面的类

public class Header 
{ 
    public virtual string ScriptNumber { get; set; } 
    public virtual IList<Detail> Details { get; set; } 
    public virtual string StartTime { get; set; } 
} 

public class Detail 
{ 
    public virtual string ScriptNumber { get; set; } 
    public virtual DateTime UpdatedDate { get; set; } 
    public virtual Header ProgramHeader { get; set; } 
} 

我想查询详细分组通过ScriptNumber并从Header表中获取相应的StartTime。任何人都可以帮助我如何做到这一点。 目前我NHibernate的查询是：

var changesInDetail = _session.QueryOver<Detail>() 
         .Where(x => x.UpdatedDate.IsBetween(changedFrom).And(changedTo)) 
         .SelectList(list => list.SelectGroup(pr => pr.ScriptNumber)) 
         .Future<string>(); 

How to get the StartTime from Header for the grouped by value in Detail? 

如我所料以下的作品。任何人都可以确认这是否是最好的方法？

 var changedScriptsInDetail1 = _session.QueryOver<Detail>(() => detailAlias) 
       .JoinQueryOver(d => d.ProgramHeader,() => headerAlias) 
       .Where(() => detailAlias.UpdatedDate.IsBetween(changedFrom).And(changedTo)) 
       .SelectList(list => list 
        .SelectGroup(pr => pr.ScriptNumber) 
        .SelectGroup(()=>headerAlias.StartTime) 
       ) 
       .List<object[]>(); 

Answer 1

var changedScriptsInDetail1 = _session.QueryOver<Detail>(() => detailAlias) 
      .JoinQueryOver(d => d.ProgramHeader,() => headerAlias) 
      .Where(() => detailAlias.UpdatedDate.IsBetween(changedFrom).And(changedTo)) 
      .SelectList(list => list 
       .SelectGroup(pr => pr.ScriptNumber) 
       .SelectGroup(()=>headerAlias.StartTime) 
      ) 
      .List<object[]>();