On Mon, May 10, 2010 at 7:37 PM, David Zhu <dzwestwindso...@gmail.com> wrote: > Thanks guys, > > If I have nested associations, how could i count that? For ex- > > I want to do something like @totalcount = Post.comment.count , or > something like that > > How could i do that? ( i want to count the comments that belong to > that post)
Assuming that Post has_many :comments, and you've gotten the particular post of interest to be referenced by the variable post. For the sake of the example below, let's say that the id of that post is 42 then either post.comments.count or post.comments.size will do a sql query like SELECT count(*) AS count_all FROM `users` WHERE (`users`.account_id = 42) and return the value of count_all HTH -- Rick DeNatale Blog: http://talklikeaduck.denhaven2.com/ Github: http://github.com/rubyredrick Twitter: @RickDeNatale WWR: http://www.workingwithrails.com/person/9021-rick-denatale LinkedIn: http://www.linkedin.com/in/rickdenatale -- 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.
