Hi! A successful commit cannot be rolled back. Do not use commit. Use session.flush instead, then you could use rollback to revert changes.
Cheers, Pau. 2013/7/23 Ib Lundgren <ib.lundg...@gmail.com> > Hey all, > > I'd like to have a clean DB between tests, one approach that works is to > drop tables and recreate fixtures. This can be quite slow and I'd rather > have something more lean. > > If possible I'd like to create a snapshot before each test and rollback to > the snapshot after each test. From browsing the docs it seems like > SQLAlchemy might be able to achieve this using nested transactions or > subtransactions. FWIW I am using Postgres 9.1+. > > I had a quick go at this and ended up with something similar to > > *# my_db.py* > session = .... # setup connect & session to postgres > > *# my_app.py* > from .my_db import session > > def add_stuff(): > session.add(stuff) > session.commit() > > *# test.py* > from .my_db import session > from .my_app import add_stuff > > class MyTest(unittest.TestCase): > > def setUp(self): > session.begin_nested() > > def tearDown(self): > session.rollback() > > def test_app(self): > add_stuff() > > but that does not work. The commit in add_stuff is not reverted by the > rollback in tearDown. Am I going in the right direction? > > Cheers! > > -- > 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 http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- ---------------------------------- Pau Tallada Crespí Dep. d'Astrofísica i Cosmologia Port d'Informació Científica (PIC) Tel: +34 93 586 8233 ---------------------------------- -- 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 http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
