Eager load while using Linq in NHibernate 3

Question

I need help with eager loading in with Linq in NHibernate 3 trunk version.

I have a many-to-many relationship like this:

public class Post
{
    pub         


        

Answer 1

Support for this went into the trunk sometime ago; the syntax is be something like

var query = session.Query<Post>().Where(bla bla).Fetch(p => p.Tags);

If Tags in turn had another relationship, you can do:

var query = session.Query<Post>().Where(bla bla).Fetch(p => p.Tags).ThenFetch(t => t.SomethingElse);

Answer 2

For me this thread solve problem.

Linq for NHibernate - filtering on <many-to-one> foreign key causes extra lookup

var linqsession = session.Linq<FeedItem>();
linqsession.QueryOptions.RegisterCustomAction(c => c.SetResultTransformer(new DistinctRootEntityResultTransformer()));
var feedItemQuery = from ad in linqsession.Expand("Ads")
                    where ad.Id == Id
                    select ad