[Zope] Postponing insertion in database

[Juan Garcia Garcia]

Hi,

  my problem is that i have three consecutive forms: when i click the
submit button of the first one, i insert in the database and then
redirect to the second form, and the same with the second and third.
But the three insertions must be completed if i want to have a database
not corrupted. If the user stops in the second form, for example by
closing the navigator, the previous insertion must be undone.

I thought two solutions, the first one is using hidden inputs and insert
all in the last step, but i don=B4t like very much this solution. The
other one is using transactions, but i don't know how to manage them.

Anyone could help me with a suggestion or a link?

Zope 2.4.2
ZPsycopgDA 1.0
PostgreSQL 7.1.3

Thanks.
Bye. Juan