Tony, Mike helped me with a similar problem a few weeks ago:
https://groups.google.com/d/msg/sqlalchemy/k4a-v2ebeJM/bj73xd4CFwAJ In his suggestion, I stash some mapper configuration data into `info`, then use the `mapper_configured` event to audit my configuration requirements. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/e2f485df-460a-4215-bfdd-5d9ffa7aba53%40googlegroups.com.