Hi all,

I'm needing to work with some objects and not persist them into database. For this I set the FlushMode to Never, this works fine in Get, Update and Delete methods.
But when I call the Save method, the Nhibernate executes the insert to the database and this will cause some problems to my application.

Can anyone help me?

Are you using an identity generator for the primary key of that object by any chance? NHibernate will need to save that record to the database in order to generate a key. NHibernate requires a key once the object is added to the session.

If you can change the generator to assigned NHibernate will no longer need to save that record to the database. However, you will be responsible for setting the primary key value of the object prior to saving it to the NHibernate session.

Yes,
I'm using the identity generator, but I can use a composite key instead of. I will make the necessary changes, and test this solution.
I believe that it will solve my problem.

Thanks!!!!

Hi,

I made the changes and the NHibernate dont saves the record to the database.

But the NHibernate not found the record when I tryed to get him.
I use HQL to get the objects and the only method that find the record is the "Get" method. But the application must get that record in a list of objects, not just that record alone.

I'm guessing this is because you have not yet flushed the session containing these objects. You can't possibly run an HQL query (which actually runs against your database) and expect it to retrieve records which don't exist.

The reason why Get would work is that for any get/load it actually checks the session's identity map (first level cache) first, and if it is found there will return it. Therefore, you will not need to make the database call, and will still receive the item.

Now, by default NHibernate actually flushes the items of the type you are querying for before you run a query, however, you have set FlushMode to Never, therefore NHibernate will not flush these changes for you automatically.

In this case you either need to flush the session, or perform the filtering in memory.

Hi jchapman,

The programmer that uses this funcionality, found a way to use the "Get" method and the problem is solved. Thanks!