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问题描述
FNH新手问题 -我有两个对象RR和TT定义如下:
$ pre > public class RR
{
Id
Name
TT_Id //对应TT.Id
}
公共类TT
{
Id
名称
类型
}
我想根据以下SQL过滤来自RR的记录:
SELECT RR。*
FROM RR
LEFT OUTER JOIN TT ON RR.TT_Id = TT.Id
WHERE TT.Type<> 7
任何人都可以请指导如何在NH中添加过滤条件来达到上述目的。
谢谢!
解决方案
为什么你有 TT_Id 而不是 TT 本身在 RR 中?如果它引用 TT ,那么
resultlist = session.CreateCriteria< RR>()
.CreateCriteria(TT)
.Add(Restrictions.Not(Restrictions。 Eq(Type,7)))
.List< RR>();
否则
var subquery = DetachedCriteria.For ()
.Add(Restrictions.Not(Restrictions.Eq(Type,7)))
.SetProjection(Projections.Id() );
resultlist = session.CreateCriteria< RR>(
.Add(Subqueries.In(TT_id,subquery)))
.List< RR>
或
的IList<对象[] GT; resultlist = session.CreateSqlQuery(SELECT RR。* FROM RR LEFT OUTER JOIN TT ON R.TT_Id = TT.Id WHERE TT.Type<> 7)
.List()。Cast< object [ >();
// hydrate RR你自己在这里
FNH Newbie question -
I have two objects RR and TT defined as following:
public class RR
{
Id
Name
TT_Id //corresponds to TT.Id
}
public class TT
{
Id
Name
Type
}
I want to filter records from RR as per following SQL:
SELECT RR.*
FROM RR
LEFT OUTER JOIN TT ON RR.TT_Id = TT.Id
WHERE TT.Type <> 7
Can anyone please guide how can I add filter criteria to achieve above in NH.
Thank you!
解决方案
why you have TT_Id and not TT itself in RR? IMO it will make a lot of things more difficult than needed.
if it would reference to TT then
resultlist = session.CreateCriteria<RR>()
.CreateCriteria("TT")
.Add(Restrictions.Not(Restrictions.Eq("Type", 7)))
.List<RR>();
otherwise
var subquery = DetachedCriteria.For<TT>()
.Add(Restrictions.Not(Restrictions.Eq("Type", 7)))
.SetProjection(Projections.Id());
resultlist = session.CreateCriteria<RR>()
.Add(Subqueries.In("TT_id", subquery)))
.List<RR>();
or
IList<object[]> resultlist = session.CreateSqlQuery("SELECT RR.* FROM RR LEFT OUTER JOIN TT ON R.TT_Id = TT.Id WHERE TT.Type <> 7 ")
.List().Cast<object[]>();
// hydrate RR yourself here
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