On 21 aug, 13:16, Felix Schäfer <[email protected]> wrote: > Am 21.08.2009 um 12:19 schrieb jhaagmans: > > > @attributes = root_attribute.self_and_descendants > > > However, when I put the following in my views to be able to descend > > into the model: > > > <% @attributes.root.children.each do |attribute| %> > > ... > > <% end %> > > I think I now see where the problem is. To be quite honest, I'm > surprised this even works, because @attributes is a set, and you > shouldn't be able to call root on it. Anyway, self_and_descendants > gets you a flat set, from which you could reconstruct a tree on your > own, but I don't think that would be that easy. > > What I can come up right now is a way to cut the calls down to the > number of nodes with children with something like: > > """ > def my_awesome_helper(root) > result = "<ul>" + "<li>" + root.someattribute > if root.children { > root.children.each do |child| > result += my_awesome_helper(child) > end > end > result += "</li>" + "</ul>" > end > """ > (yeah, ugly, and I'm not even sure the syntax is right, but you get > the idea) > > You'd then just have to call the helper on the root node in your view. > > Mit freundlichen Grüßen, > > Felix Schäfer
Danke Felix! I'm quite unsure whether this would limit the number of queries. I already call children.each in my views, so this would probably, in terms of performance, won't really help me. I was told I could perform this using one single query, but that seems impossible. And that brings me back to a point where I question the advantages of using awesome_nested_set over using acts_as_tree in combination with acts_as_list. The thing is, it all made sense! And it would have been perfect. --~--~---------~--~----~------------~-------~--~----~ 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
