Chris@1115: class Note < ActiveRecord::Base
Chris@1115:   acts_as_nested_set :scope => [:notable_id, :notable_type]
Chris@1115: end
Chris@1115: 
Chris@1115: class Default < ActiveRecord::Base
Chris@1115:   self.table_name = 'categories'
Chris@1115:   acts_as_nested_set
Chris@1115: end
Chris@1115: 
Chris@1115: class ScopedCategory < ActiveRecord::Base
Chris@1115:   self.table_name = 'categories'
Chris@1115:   acts_as_nested_set :scope => :organization
Chris@1115: end
Chris@1115: 
Chris@1115: class RenamedColumns < ActiveRecord::Base
Chris@1115:   acts_as_nested_set :parent_column => 'mother_id', :left_column => 'red', :right_column => 'black'
Chris@1115: end
Chris@1115: 
Chris@1115: class Category < ActiveRecord::Base
Chris@1115:   acts_as_nested_set
Chris@1115: 
Chris@1115:   validates_presence_of :name
Chris@1115: 
Chris@1115:   # Setup a callback that we can switch to true or false per-test
Chris@1115:   set_callback :move, :before, :custom_before_move
Chris@1115:   cattr_accessor :test_allows_move
Chris@1115:   @@test_allows_move = true
Chris@1115:   def custom_before_move
Chris@1115:     @@test_allows_move
Chris@1115:   end
Chris@1115: 
Chris@1115:   def to_s
Chris@1115:     name
Chris@1115:   end
Chris@1115: 
Chris@1115:   def recurse &block
Chris@1115:     block.call self, lambda{
Chris@1115:       self.children.each do |child|
Chris@1115:         child.recurse &block
Chris@1115:       end
Chris@1115:     }
Chris@1115:   end
Chris@1115: end
Chris@1115: 
Chris@1115: class Thing < ActiveRecord::Base
Chris@1115:   acts_as_nested_set :counter_cache => 'children_count'
Chris@1115: end
Chris@1115: 
Chris@1115: class DefaultWithCallbacks < ActiveRecord::Base
Chris@1115: 
Chris@1115:   self.table_name = 'categories'
Chris@1115: 
Chris@1115:   attr_accessor :before_add, :after_add, :before_remove, :after_remove
Chris@1115: 
Chris@1115:   acts_as_nested_set :before_add => :do_before_add_stuff,
Chris@1115:     :after_add     => :do_after_add_stuff,
Chris@1115:     :before_remove => :do_before_remove_stuff,
Chris@1115:     :after_remove  => :do_after_remove_stuff
Chris@1115: 
Chris@1115:   private
Chris@1115: 
Chris@1115:     [ :before_add, :after_add, :before_remove, :after_remove ].each do |hook_name|
Chris@1115:       define_method "do_#{hook_name}_stuff" do |child_node|
Chris@1115:         self.send("#{hook_name}=", child_node)
Chris@1115:       end
Chris@1115:     end
Chris@1115: 
Chris@1115: end
Chris@1115: 
Chris@1115: class Broken < ActiveRecord::Base
Chris@1115:   acts_as_nested_set
Chris@1115: end