Just a quick try (you haven't showed up your database schema): @articles = Article.all( :conditions => ["start_date >= ? AND id NOT IN ( SELECT m.article_id from moderations m WHERE m.user_id = ? )", today, current_user.id], :order => 'start_date')
- Maurício Linhares http://alinhavado.wordpress.com/ (pt-br) | http://blog.codevader.com/ (en) On Tue, Apr 7, 2009 at 4:53 PM, Peter Laurens <rails-mailing-l...@andreas-s.net> wrote: > > Hi, > > I have an Articles model. > And a Moderations model. > And a Users model. > > Articles have many Users (moderators) through Moderations. > Users have many Articles (moderated articles) through Moderations. > > This works fine so far. I can link up a user with all their moderated > articles etc. > > But, I'd like a find which would select all the Articles, except it > hides (does not return) the articles the current user has moderated. I > am currently doing this in Ruby in two stages like this: > > @articles_list = Article.find(:all, :conditions => ["start_date >= ?", > today], :order => 'start_date') > @articles_list -= current_user.moderated_articles if current_user > > And then displaying the articles list. > > This works, but I fully suspect it is cripplingly slow, and I'd also > like to paginate these articles and all the pagination tutorials seem to > warn against fetching everything in one go. This seems like good advice. > > So I am seeking guidance on a join condition that would do what I want. > I'm guessing I need an inner join on the article_id on the moderations > table, but need to make sure that the user_id of those records are the > same as the current user only. So this is confusing me a bit. > > Many thanks for any help you may offer! > > - N > -- > Posted via http://www.ruby-forum.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-talk@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 -~----------~----~----~----~------~----~------~--~---
