Thanks all. Niphlod what a great query. I'm just disappointed about the orderby, it don't have any effect: categories=db(db.news_categories.id.belongs(db(db.news.on_line==True). _select(db.news.category, distinct=True, orderby=db.news.category.name))). select()
Do you know why? Il giorno martedì 10 marzo 2015 12:44:55 UTC+1, Niphlod ha scritto: > > 2 queries ? nooooo > > subselect - way, 1 query. > > db(db.news_categories.id.belongs(db(db.news.id>0)._select(db.news.category, > distinct=True))).select() > > technically, there is also another one, more useful in case you'd like to > select, e.g., only categories with at least x news, but that's another > story. > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
