In that case can you show us the code that is causing the problem? On Fri, Sep 14, 2018 at 2:55 PM Alex Rothberg <agrothb...@gmail.com> wrote: > > I am not generating any IDs myself and I already have relationships between > the models. > > On Friday, September 14, 2018 at 4:33:08 AM UTC-4, Simon King wrote: >> >> On Thu, Sep 13, 2018 at 10:50 PM Alex Rothberg <agrot...@gmail.com> wrote: >> > >> > Is it possible to hint at sqla the order in which it should write out >> > changes to the DB? >> > >> > I am having issues in which I add two new objects to a session, a and b >> > where a depends on b, but sqla is flushing a before b leading to an fk >> > issue. I can solve this a few ways: explicitly calling flush after adding >> > b, or changing the fk constraint to be initially deferred. Ideally I would >> > not have to do either of these. >> > >> >> If you have configured a relationship between the two classes >> (http://docs.sqlalchemy.org/en/latest/orm/tutorial.html#building-a-relationship), >> and you've linked the objects together using that relationship (a.b = >> b), then SQLAlchemy will flush them in the correct order. If you are >> generating your IDs in Python and assigning them to the primary and >> foreign key columns directly, SQLAlchemy probably won't understand the >> dependency. >> >> Does using a relationship fix your problem? >> >> Simon > > -- > 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.
-- 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.
