[Zope-DB] Using psycopg directly in Zope Python script

Jørgen Frøjk Kjærsgaard jfk at metation.com
Fri Jul 1 17:28:51 EDT 2005

I need to be able to access a Postgresql database directly from Zope 
Python scripts (Z SQL Methods is not an option as the SQL code occurs in 
modules that must be re-usable in a non-Zope context).

After several attempts at getting the DB-API connection from a Psycopg 
connection object created in Zope, I tried this in a Zope Python script:

import psycopg
dbcon = psycopg.connect('host=%s dbname=%s user=%s' % ('dbhost', 
'dbname', 'username'))

When run outside Zope, it opens a connection as expected. When run in 
Zope, however, I get "thrown out" - the browser asks me to enter my user 
name and password again. I get no error message!

Does Zope somehow create a restricted environment where opening a 
database connection is impossible? Is there a way to bypass that 

Ideally I would like to use the DB-API object from a Zope Psycopg 
connection object so that it worls within Zope's transactions, but any 
help at just getting a working connection in any way will be greatly 

med venlig hilsen / regards

Jørgen Frøjk Kjærsgaard

Metation ApS
systemudvikling * hosting * IT rådgivning

More information about the Zope-DB mailing list