Querying on Collection with Nhibernate Criteria Api?

Question

I have an "Estate" entity, and this entity has a collection "EstateFeatures"(type:EstateFeature) and EstateFeature has a property "MyFeatureValue".

Note: These are the limited properties for the question. All Entities has an Id and all necesarry etc

Estate

IList<EstateFeature> EstateFeatures;

EstateFeature

FeatureValue MyFeatureValue;

FeatureValue

public virtual long Id;

I am trying to get Real Estates which have the given FeatureValue.Id

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

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

Nothing returned from this query, am i doing something wrong ?

Thanks

Answer 1

If I understand correctly I think something like this might work

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