[Grok-dev] How to do foreign keys in ZODB+Grok

[Bahman Movaqar]

Hi all,

Reading this tutorial 
(http://grok.zope.org/documentation/how-to/using-a-relationfield-for-relationships-between), 
the author uses `z3c.relationfield'.  I was wondering what other 
libraries exist to do this?

I should probably ask this on ZODB lists but I thought here I may find 
some hints about which approach suits Grok better.

TIA,

-- 
Bahman Movaqar  (http://BahmanM.com)
ERP Evaluation, Implementation, Deployment Consultant