txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" do_some_stuff() with db.savepoint() as sp1: do_more_things() with db.savepoint() as sp2: even_more() # Oops, something bad happened, roll back # just the changes made

transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be. transaction() as txn: do_some_stuff() with db.savepoint() as sp1: do_more_things() with db.savepoint() as sp2: even_more() # Oops, something bad happened, roll back # just the changes made in this block. if s

txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey"

txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey"

txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey"

transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be. transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be.

transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be. transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be.

txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey"

transaction() as txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey" will be.

txn: with db.savepoint() as sp: User.create(username='mickey') with db.savepoint() as sp2: User.create(username='zaizee') sp2.rollback() # "zaizee" will not be saved, but "mickey"