Re: Validation and Events

George Lee wrote:
> Is it possible yet to hook in a validator to an Archetypes object using
> Five/Zope3 events?

I don't understand what events have to do with validators.

> Related to Martin Aspeli's work on schema-by-interface -- it's clear how that
> could be used to add in a validator just for one new field, but not how we could
> validate that the data from two fields satisfy some condition (e.g., min < max).

You want zope.interface's invariants.  See 
http://svn.zope.org/Zope3/trunk/src/zope/interface/README.txt?rev=70082&view=auto


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys -- and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV