On Jun 30, 2011, at 9:23 AM, Adrian wrote: > SQAlchemy 0.7.1 / pyscopg 2.2.1 / PostgreSQL 9.0 > --------------------------------------------------------------------------- > > I have a weird problem with orm queries that contain custom functions, > in this case from postgres contrib modules. When I do a query like > this > > session.query(Entity, func.similarity(Entity.string, > 'querystring')).all() # postgres pg_trgm extension > > I will get the error below. However, when I specify one or all the > columns of the Entity individually it works. It also works if the > function is in the .order_by() clause. > > Any ideas where the problem could come from?
this seems like it has to do with the type of object being returned from psycopg2, as the Query runs the rows through a uniquing function that uses sets, maybe a comparison is emitting that TypeError. The stack trace doesn't quite make it clear. It would be interesting to see what session.execute(myquery.statement) sends back in the result rows. (I haven't looked up the "SIMILARITY" function in the PG docs yet to see what it returns). > > ----- > > /usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.pyc in > all(self) > 1675 > 1676 """ > -> 1677 return list(self) > 1678 > 1679 @_generative(_no_clauseelement_condition) > > /usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.pyc in > instances(self, cursor, _Query__context) > 1916 > 1917 if filter: > -> 1918 rows = filter(rows) > 1919 > 1920 if context.refresh_state and self._only_load_props > \ > > /usr/local/lib/python2.7/dist-packages/sqlalchemy/util/ > _collections.pyc in unique_list(seq, hashfunc) > 594 if not hashfunc: > 595 return [x for x in seq > --> 596 if x not in seen > 597 and not seen.__setitem__(x, True)] > 598 else: > > TypeError: an integer is required > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalchemy@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
