使用Nhibernate Criteria Api查询集合？

我有一个"Estate"实体,这个实体有一个集合"EstateFeatures"(类型:EstateFeature),而EstateFeature有一个属性"MyFeatureValue".

注意:这些是问题的有限属性.所有实体都有Id和所有necesarry等

房地产

IList EstateFeatures;

EstateFeature

FeatureValue MyFeatureValue;

FeatureValue

public virtual long Id;

我正在尝试获得具有给定FeatureValue.Id的Real Estates

DetachedCriteria query = DetachedCriteria.For();
Conjunction and = new Conjuction();
foreach (var id in idCollection)
   and.Add(Expression.Eq("MyFeatureValue.Id",id);

query
     .CreateCriteria("EstateFeatures")
     .Add(and);
IList estates = query.GetExecutableCriteria(session).List();

这个查询没有返回任何内容,我做错了什么？

谢谢

如果我理解正确,我认为这样的事情可能有用

CreateCriteria(typeof(Estate))
     .CreateAlias("EstateFeatures", "estatefeature")
     .Add(Restrictions.In("estatefeature.MyFeatureValue.Id", ids))
     .List();