better_nested_set is great and a dream.. but I can''t seem to wrap my head around this one, if its even at all possible... I have several models that I want to have a multi-threaded msg style comment system added to. My Comment model includes: acts_as_nested_set belongs_to :commentable, :polymorphic => true belongs_to :user So along with the standard better_nested_set fields I have commentable_id and commentable_type. Has anyone used BNS with a polymorphic table? and if so how did you handle the scoping? I tried the standard root_id .. but I''m not sure what to set the root_id as. Thanks... -timw -------------- next part -------------- An HTML attachment was scrubbed... URL: http://rubyforge.org/pipermail/betternestedset-talk/attachments/20070914/70c02c3e/attachment.html