Comments on: NHibernate ICriteria Count and the missing "Having"

By: alkampfer

alkampfer — Fri, 20 Mar 2009 09:58:51 +0000

Thanks! It was a little tricky to solve it.

By: kiennx

kiennx — Fri, 20 Mar 2009 03:00:03 +0000

Thank you very much! I google for it for longs. Now I can have a little rest.

By: alkampfer

alkampfer — Fri, 13 Mar 2009 07:28:46 +0000

The solution is really simple you need only to change the condition of the subquery

ICriteria c = session.CreateCriteria(typeof(Customer2), “RootClass”);

DetachedCriteria d = DetachedCriteria.For(typeof(Customer2))
.CreateAlias(“Orders”, “Orders”)
.SetProjection(Projections.ProjectionList()
.Add(Projections.RowCount()))
.Add(Property.ForName(“Id”).EqProperty(“RootClass.Id”));

c.Add(Subqueries.Eq(0, d)); //Here is the modification
IList result = c.List();
Assert.That(result.Count, Is.EqualTo(123));

By: Antonio

Antonio — Thu, 12 Mar 2009 11:00:17 +0000

I have a similiar problem, I would want to express with ICriteria:

Select all EntityContainer that have NO EntityTest in the Test collection

or in other words how to select parent that haven’t children. How it is possible to interrogate the Count property?
Thanks in advance

By: Will Shaver

Will Shaver — Tue, 15 Jul 2008 23:26:22 +0000

Note that it now does have Having support.
http://jira.nhibernate.org/browse/NH-1280