Eager loading problem - nhibernate

Question

I've a problem with this linq to nhibernate query
var listeShopping = (from cart in session.Query<Cart>()
.Fetch(cart => cart.ItemShopping)
.ThenFetch(item => item.Manufacturer)
select cart.ItemShopping).ToList<ItemShopping>();
When I launch it I've a strange error :
Query specified join fetching, but the owner of the fetched association was
not present in the select list [FromElement{explicit,not a collection join,
fetch join,fetch non-lazy properties,classAlias=_1,role=,tableName= (...)
I need the eager loading, how can I avoid that error ? If it can help, I'll mention that I use the cart table only like a inner join table. I just need to know the ItemShopping in the Cart.
Regards
Edit
I modified the code to make it readable in english. I corrected the error.
Edit 2
I found that method, it seems to work ... Can someone check it if I didn't make an error ?
var list = (from item in session.Query<ItemShopping>()
.Fetch(item => item.Manufacturer)
from cart in item.Cart
select item).ToList<ItemShopping>();

Answer 1

I don't think it's possible to handle this scenario with Linq. But it is with HQL:
var listeShopping = session.CreateQuery(#"
select item
from Cart cart
join cart.ItemShopping item
join fetch item.Manufacturer
")
.List<ItemShopping>();
Side note: eager fetching the Manufacturer this way is not necessarily the best performing approach. Consider using batch-size in the Manufacturer class instead.