jhaagmans wrote: > Hi, > > I have a model called "ProductAttribute": > > class ProductAttribute < ActiveRecord::Base > belongs_to :product > has_many :children, :foreign_key => :parent_id, :class_name => > 'ProductAttribute', :dependent => :destroy, :order => :position > belongs_to :parent, :class_name => 'ProductAttribute' if :parent_id > acts_as_list :scope => :parent > end > > As you can see, my goal is to have an attribute with a number of > children and a parent, as long as it's not a root attribute. I think I > got it right, but if you see any errors in this, please do tell me.
I think you did that part right. > > Now I want to list an entire product, with all its attributes, in a > view, which is where I got stuck. I want these associations to show > hierarchically, so that a child is in fact a child element ( for > example a list item ) of its parent. I can get all attributes using > the product_id, so I have defined a collection called @attributes in > my controller. But how to proceed in the view? Use awesome_nested_set for this. It's much better for arbitrary tree structures than the simple adjacency list that you're currently using. > > My guess is that I need a partial which loads itself, but how to pass > along the subcollection (a child -can- have another child which can > have. another child and so on). With a nested-set model such as I am recommending, you can get all the descendants with a single query. Without it...well...good luck. :) > It's important that it sorts every > subcollection (e.g. a few children of a certain child) by position: do > I have that covered in my model by :order => :position? Maybe. Or you could use acts_as_list. > > I really hope you can help. > > Thank you! > > Jaap Haagmans Best, -- Marnen Laibow-Koser http://www.marnen.org mar...@marnen.org -- 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 -~----------~----~----~----~------~----~------~--~---
