Thanks Michael for the explanation. The solution you link solve work but it doesn't satisfy me. I use sqlite in developement and postgre in production. That's why I'm looking for a "configuration's solution".
If you think it's isn't possible ti work, I will use postgre in each environement. 2014-12-30 21:12 GMT+01:00 Michael Bayer <mike...@zzzcomputing.com>: > > > Boris SABATIER <sabatier.bo...@gmail.com> wrote: > >> @Michael: >> Are you sure the default value of isolation_level is None ? > > OK what I forgot to clarify in my other email is that you’re working with > “connect_args” here, which with engine_from_config would not be a separate > .ini value in any case; things that go into create_engine()->connect_args > are supposed to be in the query string. So the isolation_level you’re > talking about here isn’t SQLAlchemy’s version of this, it’s the one that’s > specific to the pysqlite DBAPI. > > However, none of that matters, because you’re trying to use SAVEPOINT and > you definitely don’t just want to turn on pysqlite’s autocommit and do > nothing else. > > Your use case here is specifically addressed here: > > http://docs.sqlalchemy.org/en/rel_0_9/dialects/sqlite.html#pysqlite-serializable > > You will need to implement the events given there in order to use SAVEPOINT > transactions, which does include the “isolation_level=None” but also > critically re-implements the fact that you need to emit BEGIN at transaction > start. > > > > > >> Because when I didn't set to None, I can't use nested session with >> sqlite and when I set it to None it's works. >> >> 2014-12-30 19:42 GMT+01:00 Michael Bayer <mike...@zzzcomputing.com>: >>> Boris Sabatier <sabatier.bo...@gmail.com> wrote: >>> >>> Hi, >>> >>> I need to pass connect_args={'isolation_level':None} when I create my >>> engine. >>> >>> >>> >>> “None” is the default that’s used if isolation_level is not passed, and >>> means to do nothing. So just don’t pass it, there’s no need to pass “None”. >>> >>> >>> With create_engine, it's work well. >>> >>> But I would like to use engine_from_config instead of create_engine. >>> >>> This is what I tried and the errors : >>> >>> # ini file : >>> sqlalchemy.connect_args = {'isolation_level':None} >>> >>> >>> well if this were to be available in an .ini file, that’s not Python code in >>> an .ini file, it would have to be interpreted, such as: >>> >>> sqlalchemy.connect_args = none >>> >>> there’s a system by which these values are interpreted on a case-by-case >>> basis that’s stated in each dialect class, if the type is something other >>> than string. But this parameter isn’t part of that, since it’s just a >>> string type, and there’s no “None” handling. You’d just omit the argument >>> to use the default value. >>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "sqlalchemy" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/sqlalchemy/ZVhiJa7QZOQ/unsubscribe. >>> To unsubscribe from this group and all its topics, 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/d/optout. >> >> -- >> 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/d/optout. > > -- > You received this message because you are subscribed to a topic in the Google > Groups "sqlalchemy" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sqlalchemy/ZVhiJa7QZOQ/unsubscribe. > To unsubscribe from this group and all its topics, 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/d/optout. -- 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/d/optout.
