class Note < ActiveRecord::Base acts_as_nested_set :scope => [:notable_id, :notable_type] end class Default < ActiveRecord::Base self.table_name = 'categories' acts_as_nested_set end class ScopedCategory < ActiveRecord::Base self.table_name = 'categories' acts_as_nested_set :scope => :organization end class RenamedColumns < ActiveRecord::Base acts_as_nested_set :parent_column => 'mother_id', :left_column => 'red', :right_column => 'black' end class Category < ActiveRecord::Base acts_as_nested_set validates_presence_of :name # Setup a callback that we can switch to true or false per-test set_callback :move, :before, :custom_before_move cattr_accessor :test_allows_move @@test_allows_move = true def custom_before_move @@test_allows_move end def to_s name end def recurse &block block.call self, lambda{ self.children.each do |child| child.recurse &block end } end end class Thing < ActiveRecord::Base acts_as_nested_set :counter_cache => 'children_count' end class DefaultWithCallbacks < ActiveRecord::Base self.table_name = 'categories' attr_accessor :before_add, :after_add, :before_remove, :after_remove acts_as_nested_set :before_add => :do_before_add_stuff, :after_add => :do_after_add_stuff, :before_remove => :do_before_remove_stuff, :after_remove => :do_after_remove_stuff private [ :before_add, :after_add, :before_remove, :after_remove ].each do |hook_name| define_method "do_#{hook_name}_stuff" do |child_node| self.send("#{hook_name}=", child_node) end end end class Broken < ActiveRecord::Base acts_as_nested_set end