Hello all, I''d like to order a model which acts as a tree by an attribute belonging to an associated model. Model A has many B. In A, I have the declaration acts_as_tree :order => "name" where name is an attribute of B. Does anybody know how I can achieve this ? Johan Johan Duflost Analyst Programmer Belgian Biodiversity Platform ( http://www.biodiversity.be) Belgian Federal Science Policy Office (http://www.belspo.be ) Tel:+32 2 650 5751 Fax: +32 2 650 5124