I moved `db.session.commit()` outside the loop. That seemed to fix the error. I'll post an update if I get more errors.
On Wednesday, December 20, 2017 at 6:43:05 PM UTC-5, Lele Gaifax wrote: > > Tom Tanner <dontsende...@gmail.com <javascript:>> writes: > > > I want to query rows and copy them while changing an attribute of each. > > Here's my code. > > > > colObjs= db.session.query(Column).filter_by(chart_id=oldChartID).all() > > for colObj in colObjs: > > make_transient(colObj) > > print colObj.id > > del colObj.id > > colObj.chart_id= newChartID > > db.session.add(colObj) > > db.session.commit() > > > > In this example, `colObjs` has two objects. > > Not sure about what causes that, but maybe you just need to commit once, > at > the end of the loop, that is something like > > colObjs= db.session.query(Column).filter_by(chart_id=oldChartID).all() > for colObj in colObjs: > make_transient(colObj) > print colObj.id > del colObj.id > colObj.chart_id= newChartID > db.session.add(colObj) > # Single commit, when the loop above exits > db.session.commit() > > ciao, lele. > -- > nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri > real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. > le...@metapensiero.it <javascript:> | -- Fortunato > Depero, 1929. > > -- 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.
