Temporary data using NHibernate

Question

Can someone provide some tips / pointers / links on how to implement a temporary state table with NHibernate? Ie, each entity table has start_date and end_date columns that describe the time interval in which this row is considered valid.
When the user inserts a new object, start_date gets "now" and end_date will be null (or date far into the future, I haven't decided yet).
When upgrading, I would like to change the UPDATE query to the following:

• UPDATE end_date for this line of entities and
• INSERT a new line with the current date / time and zero end_date.

I tried using event listeners to manually write an UPDATE query for 1, but cannot figure out how to implement a new INSERT query for 2.

Is this the right way? Or am I completely not marked here?

Answer 1

In fact, we have a working solution, I work, but it effectively kills part of the nhibernate mechanism.

For "temporary objects" NH acts only as an insertion / selection mechanism. Uninstallations and updates are performed using another utility in which the NH ORM part is convenient.

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Answer 2

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