you might want to call correlate(User) on that scalar subquery also. paste the SQL along with it on the next email.
On Jun 24, 2013, at 1:15 PM, Sebastian Elsner <sebast...@risefx.com> wrote: > Hm.... I'm lost. This is where I am now: > > session.query(User.id, Assignment.id, > session.query(func.count(Assignment.id)).filter(Assignment.user_id == > User.id).as_scalar()).join(Assignment).all() > > On 06/24/2013 04:26 PM, Michael Bayer wrote: >> it's a scalar subquery. you want to make the select() and then call >> as_scalar() on it so that it behaves like a column in a SQL expression. >> >> >> On Jun 24, 2013, at 9:34 AM, Sebastian Elsner <sebast...@risefx.com> wrote: >> >>> Hello, >>> >>> I am trying to translate this SQL to a SQLAlchemy query, but failed so far: >>> >>> select `users`.`name`, `assignments`.`id`, >>> ( >>> select count(*) >>> from `assignments` >>> where `assignments`.`user_id` = `users`.`id` >>> ) as `num_assignments` >>> from `users` >>> join `assignments` >>> on `assignments`.`user_id` = `users`.`id` >>> >>> I would like to get results of (user_id, assignment_id, >>> total_assignments_per_user_id). I have found a similar question on the list >>> (https://groups.google.com/forum/#!topic/sqlalchemy/LBEyRe3w-8Q), and tried >>> to assemble a query like so, but I am missing something... >>> >>> It would also be nice if there were a faster way to do this. Maybe someone >>> has a good idea. >>> >>> And a question on terminology: is it really called subquery if the >>> "subquery" is in the "select block" (like above). >>> >>> Many thanks >>> >>> Sebastian >>> >>> -- >>> 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. >>> >>> > > > -- > check out www.pointcloud9.com > > Sebastian Elsner - Pipeline Technical Director - RISE > > t: +49 30 20180300 flor...@risefx.com > f: +49 30 61651074 www.risefx.com > > RISE FX GmbH > Schlesische Strasse 28, Aufgang B, 10997 Berlin > c/o action concept, An der Hasenkaule 1-7, 50354 Hürth > Geschaeftsfuehrer: Sven Pannicke, Robert Pinnow > Handelsregister Berlin HRB 106667 B > > -- > 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. > > -- 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.
