Question

How can I do this query with NHibernate

select top 10 count(distinct classedition.createdby_id) as editions, class.id,
       class.name, class.createdon, class.createdby_id
from class 
inner join classedition on class.id = classedition.class_id
group by class.id, class.name, class.createdon, class.createdby_id
order by editions desc, class.createdon desc

I’m using NHibernate 3. I tried to do it with the new Linq provider without success. I don’t care about the way of doing it as long as it produce the exact sql query above. I would prefer writing a strongly typed query, without magic string if possible.

I’m new to NHibernate so this question may be simple.

Here is a little more info

I use Fluent NHibernate with AutoMappings. The C# classes are very simple:

public  class Class
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual DateTime CreatedOn { get; set; }
}

public class ClassEdition
{
    public virtual int Id { get; set; }
    public virtual Class Class { get; set; }
    public virtual User CreatedBy { get; set; }
}

public class User
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
}

Answer 1

I finally resolved the problem by using a View.

I don’t want to be rude, but it seems like the NHibernate community is more inclined to argue on the way I ask a question then responding to the question itself. See the comments for Diego Mijelshon’s answer. I received the same reproaches (about using unit tests) on nhusers (Google Groups): http://groups.google.com/group/nhusers/browse_thread/thread/4c74269aefb918fc