Fluent NHibernate and Stored Procedures - nhibernate

Question

I have a basic Customer/Order/OrderItem/Product object graph. Customer has Many Orders, Order has Many Order Items, Product has many Order Items. These are successfully mapped using FNH.
I've hit a snag with configuring a stored procedure & fluent-nhibernate. There is not a native way to map stored procedures in fluent-hibernate FNH (version 1.0 RTM). There was a solution here about adding parts to class mappings but the AddPart call has been taken out of the release of FNH.
The stored procedure is simple:
CREATE PROCEDURE [dbo].[OrderCountByCustomer]
AS
BEGIN
SET NOCOUNT ON;
SELECT
c.name as [Customer.Name],
CAST(count(o.id) as NVARCHAR) as [Customer.OrderCount]
FROM customer c
LEFT OUTER JOIN [order] o
ON o.customer_id = c.id
GROUP BY c.name
END
There's a CustomerOrderSummary.hbm.xml in
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="NVAble.Orders.Core" namespace="NVAble.Orders.Core">
<sql-query name="OrderSummary">
<return class="CustomerOrderSummary">
<return-property column="Customer.Name" name="CustomerName" />
<return-property column="Customer.OrderCount" name="OrderCount" />
</return>
EXEC [OrderCountByCustomer]
</sql-query>
</hibernate-mapping>
Here is the CustomerOrderSummary class def:
namespace NVAble.Orders.Core
{
public class CustomerOrderSummary
{
virtual public string CustomerName { get; set; }
virtual public string OrderCount { get; set; }
public override string ToString()
{
return string.Format("{0} {1}", CustomerName, OrderCount);
}
}
}
However, when try to start a NH session i get error in named query OrderSummary with no other details.
I'm probably missing something really simple that maps the CustomerOrderSummary class to the procedure, I don't know. That domain object obviously doesn't map directly to a table in the data base so I'm unsure if having a normal <class /> HBM mapping would work?
Thanks in advance!

Answer 1

Ok, so after a bit more investigation. I needed a mapping for the Domain Class as well as a named query hbm.xml file.
In my configure class i have
config.Mappings(x =>
{
x.FluentMappings.AddFromAssemblyOf<CustomerMapping>().ExportTo(schemaPath);
x.HbmMappings.AddFromAssemblyOf<CustomerOrderSummary>();
});
Only downside is that I need to manually create the xml mapping for the stored procedure, I can't use FNH at the current time