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- acts_as_tree
- ============
- Specify this +acts_as+ extension if you want to model a tree structure by providing a parent association and a children
- association. This requires that you have a foreign key column, which by default is called +parent_id+.
- class Category < ActiveRecord::Base
- acts_as_tree :order => "name"
- end
- Example:
- root
- _ child1
- _ subchild1
- _ subchild2
- root = Category.create("name" => "root")
- child1 = root.children.create("name" => "child1")
- subchild1 = child1.children.create("name" => "subchild1")
- root.parent # => nil
- child1.parent # => root
- root.children # => [child1]
- root.children.first.children.first # => subchild1
- Copyright (c) 2007 David Heinemeier Hansson, released under the MIT license