On Jul 11, 2010, at 5:40 AM, Daniel wrote: > >>> I've managed to fix it using sqalchemy.orm.outerjoin in conjunction >>> with query's select_from function. Out of interest, why is the naming >>> scheme different for these 2 functions? >> >> which two names/functions are you referring to ? >> > > outerjoin and select_from, one seems to be lower case, the other, > lower case with underscores. Is this because one is a function and the > other is a method?
we use lowercase with underscores for all names, but the underscores aren't applied to words that colloquially tend to be one word like "outerjoin". > > unfortunately this: > > query(Vote).outerjoin((Vote, subquery.c.max_id==Vote.id)) > > generates invalid SQL and this: > > query(Vote).outerjoin((subquery, subquery.c.max_id==Vote.id)) > > has the join backwards, as ordering counts. I was trying things like: > > subquery.outerjoin((Vote, subquery.c.max_id==Vote.id)) > > This generates the rather indecipherable error "AttributeError: > '_TextClause' object has no attribute 'foreign_keys'". well in that last example subquery is not a Query() object, its an Alias construct. It has a different API and you should work through the SQL Expression Tutorial to get a feel for expression constructs. It probably shouldn't be making a text() construct out of a tuple, though. ticket 1847 > If you try > doing the same query, but don't generate a subquery first the error is > "Not unique table/alias: 'votes'". > > But as I say I found a workaround using the orm.outerjoin function, so > this is rather academic from my perspective. > > Thanks, > > Daniel > > -- > 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 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 sqlalch...@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.
