[Zope-dev] unique rec id for Gadfly?

[Sin Hang Kin]

Dear Zope-masters,

How do I generate a unique record id for a newly inserted record for Gadfly?

I have the following code:
<dtml-call "manage_changeProperties(last_rid=last_rid + 1)">
<dtml-let rid=last_rid>
<dtml-call insert_new_record>
</dtml-let>

where last_rid is a property defined in the folder. However, rid does not
get into the zsql method.

BTW, how do I test if the insert operation success?

Rgs,

Kent Sin