How can I duplicate an object?

mdsrlz · **Posted:** Wed Jan 31, 2007 3:58 pm

Hi.

I'm using NH 1.2.0 Alpha and .NET 2.0 and would like to know if it's possible to duplicate an object.

For example:

Code:

Cat c1 = Session.Get(1);
c1.Id = GetNextId(typeof(Cat));
Session.Save(c1);
Session.Flush(); // I've done the tests using Flush() and Transactions

When I use the code above, NH does not save c1. I think NH thinks that c1 alread is saved, so doesn't save...

Is there any way to duplicate an object?

Thanks

mnichols · **Joined:** Mon Aug 21, 2006 9:18 am **Posts:** 179

Try evicting c1 before changing the identifier using Session.Evict(c1). Personally , I avoid this kind of thing by implementing ICloneable or serializeing the object to a file stream sans Id.

mdsrlz · **Posted:** Thu Feb 01, 2007 7:45 am

Thanks guy! :)

Just a question: why you avoid Evict?

Bye

mnichols · **Joined:** Mon Aug 21, 2006 9:18 am **Posts:** 179

It's not Session.Evict I avoid...that is useful for the rare times I need to make a persisted object detached.
I just meant that when making a copy of an object I think it is more sensible to do a clone since it avoids any dependency on my persistence to perform that role...It's more intention-revealing. ICloneable exists for that purpose.
Just a matter of preference really.

MIKE

mdsrlz · **Posted:** Fri Feb 02, 2007 6:57 am

mnichols wrote:

It's not Session.Evict I avoid...that is useful for the rare times I need to make a persisted object detached.
I just meant that when making a copy of an object I think it is more sensible to do a clone since it avoids any dependency on my persistence to perform that role...It's more intention-revealing. ICloneable exists for that purpose.
Just a matter of preference really.

MIKE

ok, thanks anyway ;)