Hi,
I have this problem:
When I try to implement Ayende's complex searching found at:
http://ayende.com/Blog/archive/2006/12/07/ComplexSearchingQueryingWithNHibernate.aspx
with the object graph:
Person:
M:1 Address:
M:1 Street:
M:1 Place:
M:1
Country
I get the following error: NHibernate.QueryException: Cannot use
subqueries on a criteria without a projection.
I am doing this:
public List<Person> Find()
{
DetachedCriteria query = DetachedCriteria.For<Person>();
AddAddressQuery(query);
}
private void AddAddressQuery(DetachedCriteria query)
{
DetachedCriteria addressQuery = null;
if (!String.IsNullOrEmpty(SearchParams.HouseNumer))
{
addresaQuery = DetachedCriteria.For<Address>();
addresaQuery.Add(Restrictions.Eq("HouseNumer",
SearchParams.HouseNumer));
}
this.AddStreetQuery(ref addressQuery);
if (addressQuery != null)
{
query.CreateCriteria("Address1",
"address1").Add(Subqueries.Exists(addressQuery));
}
}
private void AddStreetQuery(ref DetachedCriteria query)
{
DetachedCriteria streetQuery = null;
if (this.SearchParams.StreetId.HasValue)
{
streetQuery = DetachedCriteria.For<Street>();
streetQuery .Add( Restrictions.Eq("Id",
this.SearchParams.StreetId.Value));
}
if (streetQuery != null)
{
query = query ?? Query.CreateCriteria("Address1");
query.CreateCriteria("Street",
"street").Add(Subqueries.Exists(streetQuery ));
}
}
What Am I doing wrong?
Please help
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