I'm playing with the new code mapping feature using the Fabio Maulo
sample (http://fabiomaulo.blogspot.com/2011/07/nhibernate-playing-with-
mapping-by-code.html).
I change the model to ensure that no Order can exists without a Client
(just the relevant code):
public class OrderMapping : EntityMapping<Order>
{
public OrderMapping()
{
ManyToOne(x => x.Customer, map =>
{
map.NotNullable(true); // <<<<< CHANGE HERE
map.Column("CustomerId");
});
Property(x => x.EmissionDay, map =>
map.Type(NHibernateUtil.Date));
Bag(x => x.Items, map => map.Key(km =>
km.Column("OrderId")));
}
}
public class CustomerMapping : EntityMapping<Customer>
{
public CustomerMapping()
{
Property(x => x.CommercialName);
NaturalId(map => map.Property(x => x.TaxId));
Bag(x => x.Orders, map =>
{
map.Key(km => km.Column("CustomerId"));
map.Cascade(Cascade.All.Include(Cascade.DeleteOrphans));
});
}
}
When I try delete a Client instance with some Orders I receive this
exception:
{"could not delete collection: [ConsoleApplication2.Customer.Orders#1]
[SQL: UPDATE [Order] SET CustomerId = null WHERE CustomerId = @p0]"}
Why NHibernate try to set Order.CustomerId = null before delete the
record? Is there a way to workaround this behavior?
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