I'm having trouble getting the ImportType to work with ClassMap for
use with a 'Dynamic Instantiation class' within an HQL query.
For background, I'm trying to follow the example in 'Nhibernate In
Action', Chpt 7 - writing report queries:
Using Dynamic Instantiation
If you find working with arrays of values a little cumbersome,
NHibernate let’s you use dynamic instantiation and define a class to
represent each row of results. You can do this using the HQL select
new construct:
select new ItemRow( item.id, item.Description, bid.Amount )
from Item item join item.Bids bid
where bid.Amount > 100
Here is my (simple) example that I'm trying to get to work:
var query = Session.CreateQuery(
@"select new PatientVisitSummary(v.id,
v.AdmissionDate)
from Patient p join p.Visits v
where p.Id = :patientId");
query.SetParameter("patientId", patientId);
And my classmap:
public class PatientVisitSummaryMap : ClassMap<PatientVisitSummary>
{
public PatientVisitSummaryMap()
{
ImportType<PatientVisitSummary>();
}
}
However, when I try to execute the query, I get the following
exception:
System.Xml.Schema.XmlSchemaValidationException: The element 'class' in
namespace 'urn:nhibernate-mapping-2.2' has incomplete content. List of
possible elements expected: 'meta, subselect, cache, synchronize,
comment, tuplizer, id, composite-id' in namespace 'urn:nhibernate-
mapping-2.2'.
I know I'm doing something wrong, but can't figure out what. Any
advice would be greatly appreciated.
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