Posted: Thu Jul 15, 2004 10:57 am Post subject: net.sf.hibernate.id.IdentifierGenerationException

I use struts to get a actionFormBean from an Html Formular, and when i try to save this bean using sess.save(actionFormBean); I get an exception
net.sf.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save()
I store all of fields(whith identifers) in this html fomular, so i thinks that they are assigned manually .
Thinks in advance.

I still remember one of the advices about Struts form beans :):
Form Bean - is a View Object, don't use it for transferring data or as Business Entity.

And I guess you are using "assigned" key generator, that means that you have to generate ID and set it manually.

http://www.hibernate.org/hib_docs/reference/en/html/mapping.html#mapping-declaration-id-assigned
assigned
lets the application to assign an identifier to the object before save() is called.

--
Leonid

That is Form Bean is a "V" in MVC, but not an "M".....

Is there any solution to store Data from the ActionFormBean to an HibernateBean or i should di it field per field?

You can use Jakarta Commons Bean Utils http://jakarta.apache.org/commons/beanutils/

BeanUtils.copyProperties
http://jakarta.apache.org/commons/beanutils/api/org/apache/commons/beanutils/BeanUtils.html#copyProperties(java.lang.Object,%20java.lang.Object)
or
PropertyUtils.copyProperties
http://jakarta.apache.org/commons/beanutils/api/org/apache/commons/beanutils/PropertyUtils.html#copyProperties(java.lang.Object,%20java.lang.Object)

--
Leonid

ok thinks a lot