I need to *switch off changing* (not new) database rows and write all changes to specific table on event "*before_commit*".
But when i try to use *config.session.rollback()* SqlAlchemy show me *AttributeError: 'NoneType' object has no attribute 'transaction'* I try config.session.expunge all instances on config.session.dirty and config.session.deleted but changes anyway write to database Can someone help me, how can i *drop all transactions *and *write new *on event *before_commit* ? -- 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 post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
