Thanks everyone, that was really helpful! On Sun, Feb 14, 2010 at 4:31 AM, Frederick Cheung <frederick.che...@gmail.com> wrote: > > > On Feb 14, 6:54 am, Frank Kim <railso...@gmail.com> wrote: >> I have a model, let's call it Player. >> >> It has many Trophies. >> >> How do I do a simple query in Rails in my controller that will return >> let's say all Players that have more than 5 tropies? >> >> Sorry for the dumb question but I can't figure it out. :-) > > > If for some reason you don't want to use a counter cache then you can > write it as > > SELECT players.*, count(*) as trophy_count from players > inner join trophies on trophies.player_id = players.id > group by players.id having trophy_count > 5 > > But using a counter_cache and an index on that column would be way > faster. > > Fred > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-t...@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > >
-- Frank Kim http://betweengo.com/ -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
