How can I get distinct values using Linq to NHibernate?
- by Chris
I've been trying to get distinct values using Linq to NHibernate and I'm failing miserably.
I've tried:
var query = from requesters in _session.Linq<Requesters>()
orderby requesters.Requestor ascending
select requesters;
return query.Distinct();
As well as
var query = from requesters in _session.Linq<Requesters>()
orderby requesters.Requestor ascending
select requesters;
return query.Distinct(new RequestorComparer());
Where RequestorComparer is
public class RequestorComparer : IEqualityComparer<Requesters>
{
#region IEqualityComparer<Requesters> Members
bool IEqualityComparer<Requesters>.Equals(Requesters x, Requesters y)
{
//return x.RequestorId.Value.Equals(y.RequestorId.Value);
return ((x.RequestorId == y.RequestorId) && (x.Requestor == y.Requestor));
}
int IEqualityComparer<Requesters>.GetHashCode(Requesters obj)
{
return obj.RequestorId.Value.GetHashCode();
}
#endregion
}
No matter how I structure the syntax, it never seems to hit the .Distinct(). Without .Distinct() there are multiple duplicates by default in the table I'm querying, on order of 195 total records but there should only be 22 distinct values returned.
I'm not sure what I'm doing wrong but would greatly appreciate any assistance that can be provided.
Thanks
