On Mon, Feb 21, 2011 at 2:48 PM, Paul Bergstrom <li...@ruby-forum.com>wrote:
> I think I'm on the right track. But I get the first post for each user, > not the latest. This is what I use. > > Model.all(:select => "*, max(id)", :group => :user_id) > > How do get the latest? > > In Rails 3 syntax, Post.where(:user_id => given_user_id).group(:user_id).order(:updated_at DESC).limit(number).group_by(:&user_id) First, group the results by user_id. Then, order the updated_at or created_at in DESC order. Then, you can limit the results for each user by passing a number. Then, finally return a hash of all the results with keys as user_id for easier and better retrieval. > -- > 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. > > -- 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.
