Hi, in ZopeBook I read that Zope's transaction are tied to SQL backend's ones. I do not know whether this applies to ZSQL methods only, but I do not expect it. I got this table: CREATE TABLE testtable ( id serial, -- uses its own sequence n int4 ); I use PostgreSQL and I have psql (an interactive SQL processor) opened and I'm watching the testtable and its primary key sequence object. I'm writing a product tool and I test the SQL connection with the following code: def manage_afterAdd(self, item, container): if item is self: self.db = getattr(self,MY_CONNECTION_ID)._v_database_connection def qry(self, query): results = self.db.query(query) recs = { 'names': Results(results).names(), 'tuples': Results(results).tuples() } return recs def test0(self): self.qry('insert into testtable (n) values (10)') def test1(self): self.qry('insert into testtable (n) values (10)') self.db.commit() def test2(self): self.qry('insert into testtable (n) values (10)') self.qry('commit') def test3(self): self.qry('insert into testtable (n) values (10)') return self.qry('select * from testtable') def test4(self): self.qry('insert into testtable (n) values (10); commit') def test5(self): self.qry('insert into testtable (n) values (10); commit') return self.qry('select * from testtable') When I call test0,1,2,3 -- the inserted row is not visible in psql, but the sequence is incremented! I'm afraid there is some pending transaction I cannot reach at that moment anymore. The test4,5 properly add the row to table (and increment the seq of course) as I can watch via psql immediatelly. In test3 the returned result does not contain the new row, in test5 the new row is contained in select. What am I doing wrong and how must I arrange it not need to care about transactions at all? I expected the SQL transactions are transparent in Zope and they are either commited when the webbrowser gets the no-exception response and rolled back otherwise. Thanks in advance! -- \//\/\ (Sometimes credited as 1494 F8DD 6379 4CD7 E7E3 1FC9 D750 4243 1F05 9424.)