Silly mistake, this works fine now, thanks! On Mar 19, 12:53 am, Michael Bayer <mike...@zzzcomputing.com> wrote: > On Mar 18, 2010, at 8:28 PM, ellonweb wrote: > > > > > Hi, > > I have a query object to which I'm performing the following join and > > filter: > > Q = Q.outerjoin(Table.history_loader) > > Q = Q.filter(TableHistory.tick == 123) > > Table.history_loader is a dynamic loader that maps the two tables > > based on their id property. > > > This produces the following SQL: > > LEFT OUTER JOIN table_history ON table.id = table_history.id WHERE > > table_history.tick = 123 > > > What I actually want is something like this: > > LEFT OUTER JOIN table_history ON table.id = table_history.id AND > > table_history.tick = 123 > > > What should I do to get this query generated? I've tried the > > following: > > Q = Q.outerjoin((Table.history_loader, TableHistory.tick == > > 123)) > > Q = Q.outerjoin((Table.history_loader, and_(TableHistory, > > TableHistory.tick == 123))) > > the tuple form accepts the target, then the onclause. Table.history_loader > is an onclause in itself you want query(Table).join((TableHistory, > and_(TableHistory.tick==123, TableHistory.id==Table.id)). > > > Q = Q.outerjoin((Table.history_loader, and_(TableHistory.id == > > Table.id, TableHistory.tick == 123))) > > All 3 of these generate the following error: > > AttributeError: 'BooleanClauseList' object has no attribute > > 'is_derived_from' > > > What should I be doing? > > Thanks in advance > > > -- > > You received this message because you are subscribed to the Google Groups > > "sqlalchemy" group. > > To post to this group, send email to sqlalch...@googlegroups.com. > > To unsubscribe from this group, send email to > > sqlalchemy+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/sqlalchemy?hl=en.
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