Hi and happy new year for everybody:
I have a table with an Id of type serial. when I make the ORM mapping I use the sequence mapping type. but when I tried to inset new data I receive a message saying

An unhandled exception of type 'NHibernate.ADOException' occurred in nhibernate.dll

Additional information: Could not save object

This is the code I'm using

Imagenes nueva = new Imagenes();
// Asigning the field data
session.Save(nueva);

Imagenes is a trascient class.

i read somewhere that when you use an Id of type sequence you'll need to use two insertions.
Anyway I need help with this.
Thanks

Your Id field should be mapped like:



The important part is that the name of the sequence is specified because NHibernate does a select nextval('SEQUENCE_NAME') to retrieve the value of the Id before inserting.