Merged nested projects branch. Removes limit on subproject nesting (#594).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2304 e93f8b46-1217-0410-a6f0-8f06a7374b81

19 files changed, 1726 insertions, 0 deletions

diff --git a/vendor/plugins/awesome_nested_set/MIT-LICENSE b/vendor/plugins/awesome_nested_set/MIT-LICENSE
new file mode 100644
index 000000000..570ecf870
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/MIT-LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2007 [name of plugin creator]
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/plugins/awesome_nested_set/README.rdoc b/vendor/plugins/awesome_nested_set/README.rdoc
new file mode 100644
index 000000000..c093f751d
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/README.rdoc
@@ -0,0 +1,64 @@
+= AwesomeNestedSet
+
+Awesome Nested Set is an implementation of the nested set pattern for ActiveRecord models. It is replacement for acts_as_nested_set and BetterNestedSet, but awesomer.
+
+== What makes this so awesome?
+
+This is a new implementation of nested set based off of BetterNestedSet that fixes some bugs, removes tons of duplication, adds a few useful methods, and adds STI support.
+
+== Installation
+
+If you are on Rails 2.1 or later:
+
+  script/plugin install git://github.com/collectiveidea/awesome_nested_set.git
+  
+== Usage
+
+To make use of awesome_nested_set, your model needs to have 3 fields: lft, rgt, and parent_id:
+
+  class CreateCategories < ActiveRecord::Migration
+    def self.up
+      create_table :categories do |t|
+        t.string :name
+        t.integer :parent_id
+        t.integer :lft
+        t.integer :rgt
+      end
+    end
+
+    def self.down
+      drop_table :categories
+    end
+  end
+
+Enable the nested set functionality by declaring acts_as_nested_set on your model
+
+  class Category < ActiveRecord::Base
+    acts_as_nested_set
+  end
+  
+Run `rake rdoc` to generate the API docs and see CollectiveIdea::Acts::NestedSet::SingletonMethods for more info.
+
+== View Helper
+
+The view helper is called #nested_set_options. 
+
+Example usage:
+
+  <%= f.select :parent_id, nested_set_options(Category, @category) {|i| "#{'-' * i.level} #{i.name}" } %>
+
+  <%= select_tag 'parent_id', options_for_select(nested_set_options(Category) {|i| "#{'-' * i.level} #{i.name}" } ) %>
+
+See CollectiveIdea::Acts::NestedSet::Helper for more information about the helpers.
+
+== References
+
+You can learn more about nested sets at:
+
+  http://www.dbmsmag.com/9603d06.html
+  http://threebit.net/tutorials/nestedset/tutorial1.html
+  http://api.rubyonrails.com/classes/ActiveRecord/Acts/NestedSet/ClassMethods.html
+  http://opensource.symetrie.com/trac/better_nested_set/
+
+
+Copyright (c) 2008 Collective Idea, released under the MIT license
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/Rakefile b/vendor/plugins/awesome_nested_set/Rakefile
new file mode 100644
index 000000000..53906f68b
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/Rakefile
@@ -0,0 +1,46 @@
+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+require 'rake/gempackagetask'
+require 'rcov/rcovtask'
+require "load_multi_rails_rake_tasks" 
+
+spec = eval(File.read("#{File.dirname(__FILE__)}/awesome_nested_set.gemspec"))
+PKG_NAME = spec.name
+PKG_VERSION = spec.version
+ 
+Rake::GemPackageTask.new(spec) do |pkg|
+  pkg.need_zip = true
+  pkg.need_tar = true
+end
+
+
+desc 'Default: run unit tests.'
+task :default => :test
+
+desc 'Test the awesome_nested_set plugin.'
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
+desc 'Generate documentation for the awesome_nested_set plugin.'
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title    = 'AwesomeNestedSet'
+  rdoc.options << '--line-numbers' << '--inline-source'
+  rdoc.rdoc_files.include('README.rdoc')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end
+
+namespace :test do
+  desc "just rcov minus html output"
+  Rcov::RcovTask.new(:coverage) do |t|
+    # t.libs << 'test'
+    t.test_files = FileList['test/**/*_test.rb']
+    t.output_dir = 'coverage'
+    t.verbose = true
+    t.rcov_opts = %w(--exclude test,/usr/lib/ruby,/Library/Ruby,lib/awesome_nested_set/named_scope.rb --sort coverage)
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/awesome_nested_set.gemspec b/vendor/plugins/awesome_nested_set/awesome_nested_set.gemspec
new file mode 100644
index 000000000..c5a1d49e5
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/awesome_nested_set.gemspec
@@ -0,0 +1,20 @@
+Gem::Specification.new do |s|
+  s.name = "awesome_nested_set"
+  s.version = "1.1.1"
+  s.summary = "An awesome replacement for acts_as_nested_set and better_nested_set."
+  s.description = s.summary
+ 
+  s.files = %w(init.rb MIT-LICENSE Rakefile README.rdoc lib/awesome_nested_set.rb lib/awesome_nested_set/compatability.rb lib/awesome_nested_set/helper.rb lib/awesome_nested_set/named_scope.rb rails/init.rb test/awesome_nested_set_test.rb test/test_helper.rb test/awesome_nested_set/helper_test.rb test/db/database.yml test/db/schema.rb test/fixtures/categories.yml test/fixtures/category.rb test/fixtures/departments.yml test/fixtures/notes.yml)
+ 
+  s.add_dependency "activerecord", ['>= 1.1']
+ 
+  s.has_rdoc = true
+  s.extra_rdoc_files = [ "README.rdoc"]
+  s.rdoc_options = ["--main", "README.rdoc", "--inline-source", "--line-numbers"]
+ 
+  s.test_files = %w(test/awesome_nested_set_test.rb test/test_helper.rb test/awesome_nested_set/helper_test.rb test/db/database.yml test/db/schema.rb test/fixtures/categories.yml test/fixtures/category.rb test/fixtures/departments.yml test/fixtures/notes.yml)
+  s.require_path = 'lib'
+  s.author = "Collective Idea"
+  s.email = "info@collectiveidea.com"
+  s.homepage = "http://collectiveidea.com"
+end
diff --git a/vendor/plugins/awesome_nested_set/init.rb b/vendor/plugins/awesome_nested_set/init.rb
new file mode 100644
index 000000000..43dc7c274
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/init.rb
@@ -0,0 +1 @@
+require File.dirname(__FILE__) + "/rails/init"  
diff --git a/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb
new file mode 100644
index 000000000..fb67341b6
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set.rb
@@ -0,0 +1,547 @@
+module CollectiveIdea #:nodoc:
+  module Acts #:nodoc:
+    module NestedSet #:nodoc:
+      def self.included(base)
+        base.extend(SingletonMethods)
+      end
+
+      # This acts provides Nested Set functionality. Nested Set is a smart way to implement
+      # an _ordered_ tree, with the added feature that you can select the children and all of their
+      # descendants with a single query. The drawback is that insertion or move need some complex
+      # sql queries. But everything is done here by this module!
+      #
+      # Nested sets are appropriate each time you want either an orderd tree (menus,
+      # commercial categories) or an efficient way of querying big trees (threaded posts).
+      #
+      # == API
+      #
+      # Methods names are aligned with acts_as_tree as much as possible, to make replacment from one
+      # by another easier, except for the creation:
+      #
+      # in acts_as_tree:
+      #   item.children.create(:name => "child1")
+      #
+      # in acts_as_nested_set:
+      #   # adds a new item at the "end" of the tree, i.e. with child.left = max(tree.right)+1
+      #   child = MyClass.new(:name => "child1")
+      #   child.save
+      #   # now move the item to its right place
+      #   child.move_to_child_of my_item
+      #
+      # You can pass an id or an object to:
+      # * <tt>#move_to_child_of</tt>
+      # * <tt>#move_to_right_of</tt>
+      # * <tt>#move_to_left_of</tt>
+      #
+      module SingletonMethods
+        # Configuration options are:
+        #
+        # * +:parent_column+ - specifies the column name to use for keeping the position integer (default: parent_id)
+        # * +:left_column+ - column name for left boundry data, default "lft"
+        # * +:right_column+ - column name for right boundry data, default "rgt"
+        # * +:scope+ - restricts what is to be considered a list. Given a symbol, it'll attach "_id"
+        #   (if it hasn't been already) and use that as the foreign key restriction. You
+        #   can also pass an array to scope by multiple attributes.
+        #   Example: <tt>acts_as_nested_set :scope => [:notable_id, :notable_type]</tt>
+        # * +:dependent+ - behavior for cascading destroy. If set to :destroy, all the
+        #   child objects are destroyed alongside this object by calling their destroy
+        #   method. If set to :delete_all (default), all the child objects are deleted
+        #   without calling their destroy method.
+        #
+        # See CollectiveIdea::Acts::NestedSet::ClassMethods for a list of class methods and
+        # CollectiveIdea::Acts::NestedSet::InstanceMethods for a list of instance methods added 
+        # to acts_as_nested_set models
+        def acts_as_nested_set(options = {})
+          options = {
+            :parent_column => 'parent_id',
+            :left_column => 'lft',
+            :right_column => 'rgt',
+            :order => 'id',
+            :dependent => :delete_all, # or :destroy
+          }.merge(options)
+          
+          if options[:scope].is_a?(Symbol) && options[:scope].to_s !~ /_id$/
+            options[:scope] = "#{options[:scope]}_id".intern
+          end
+
+          write_inheritable_attribute :acts_as_nested_set_options, options
+          class_inheritable_reader :acts_as_nested_set_options
+          
+          include Comparable
+          include Columns
+          include InstanceMethods
+          extend Columns
+          extend ClassMethods
+
+          # no bulk assignment
+          attr_protected  left_column_name.intern,
+                          right_column_name.intern, 
+                          parent_column_name.intern
+                          
+          before_create :set_default_left_and_right
+          before_destroy :prune_from_tree
+                          
+          # no assignment to structure fields
+          [left_column_name, right_column_name, parent_column_name].each do |column|
+            module_eval <<-"end_eval", __FILE__, __LINE__
+              def #{column}=(x)
+                raise ActiveRecord::ActiveRecordError, "Unauthorized assignment to #{column}: it's an internal field handled by acts_as_nested_set code, use move_to_* methods instead."
+              end
+            end_eval
+          end
+          
+          named_scope :roots, :conditions => {parent_column_name => nil}, :order => quoted_left_column_name
+          named_scope :leaves, :conditions => "#{quoted_right_column_name} - #{quoted_left_column_name} = 1", :order => quoted_left_column_name
+          if self.respond_to?(:define_callbacks)
+            define_callbacks("before_move", "after_move")              
+          end
+
+          
+        end
+        
+      end
+      
+      module ClassMethods
+        
+        # Returns the first root
+        def root
+          roots.find(:first)
+        end
+        
+        def valid?
+          left_and_rights_valid? && no_duplicates_for_columns? && all_roots_valid?
+        end
+        
+        def left_and_rights_valid?
+          count(
+            :joins => "LEFT OUTER JOIN #{quoted_table_name} AS parent ON " +
+              "#{quoted_table_name}.#{quoted_parent_column_name} = parent.#{primary_key}",
+            :conditions =>
+              "#{quoted_table_name}.#{quoted_left_column_name} IS NULL OR " +
+              "#{quoted_table_name}.#{quoted_right_column_name} IS NULL OR " +
+              "#{quoted_table_name}.#{quoted_left_column_name} >= " +
+                "#{quoted_table_name}.#{quoted_right_column_name} OR " +
+              "(#{quoted_table_name}.#{quoted_parent_column_name} IS NOT NULL AND " +
+                "(#{quoted_table_name}.#{quoted_left_column_name} <= parent.#{quoted_left_column_name} OR " +
+                "#{quoted_table_name}.#{quoted_right_column_name} >= parent.#{quoted_right_column_name}))"
+          ) == 0
+        end
+        
+        def no_duplicates_for_columns?
+          scope_string = Array(acts_as_nested_set_options[:scope]).map do |c|
+            connection.quote_column_name(c)
+          end.push(nil).join(", ")
+          [quoted_left_column_name, quoted_right_column_name].all? do |column|
+            # No duplicates
+            find(:first, 
+              :select => "#{scope_string}#{column}, COUNT(#{column})", 
+              :group => "#{scope_string}#{column} 
+                HAVING COUNT(#{column}) > 1").nil?
+          end
+        end
+        
+        # Wrapper for each_root_valid? that can deal with scope.
+        def all_roots_valid?
+          if acts_as_nested_set_options[:scope]
+            roots(:group => scope_column_names).group_by{|record| scope_column_names.collect{|col| record.send(col.to_sym)}}.all? do |scope, grouped_roots|
+              each_root_valid?(grouped_roots)
+            end
+          else
+            each_root_valid?(roots)
+          end
+        end
+        
+        def each_root_valid?(roots_to_validate)
+          left = right = 0
+          roots_to_validate.all? do |root|
+            returning(root.left > left && root.right > right) do
+              left = root.left
+              right = root.right
+            end
+          end
+        end
+                
+        # Rebuilds the left & rights if unset or invalid.  Also very useful for converting from acts_as_tree.
+        def rebuild!
+          # Don't rebuild a valid tree.
+          return true if valid?
+          
+          scope = lambda{}
+          if acts_as_nested_set_options[:scope]
+            scope = lambda{|node| 
+              scope_column_names.inject(""){|str, column_name|
+                str << "AND #{connection.quote_column_name(column_name)} = #{connection.quote(node.send(column_name.to_sym))} "
+              }
+            }
+          end
+          indices = {}
+          
+          set_left_and_rights = lambda do |node|
+            # set left
+            node[left_column_name] = indices[scope.call(node)] += 1
+            # find
+            find(:all, :conditions => ["#{quoted_parent_column_name} = ? #{scope.call(node)}", node], :order => "#{quoted_left_column_name}, #{quoted_right_column_name}, #{acts_as_nested_set_options[:order]}").each{|n| set_left_and_rights.call(n) }
+            # set right
+            node[right_column_name] = indices[scope.call(node)] += 1    
+            node.save!    
+          end
+                              
+          # Find root node(s)
+          root_nodes = find(:all, :conditions => "#{quoted_parent_column_name} IS NULL", :order => "#{quoted_left_column_name}, #{quoted_right_column_name}, #{acts_as_nested_set_options[:order]}").each do |root_node|
+            # setup index for this scope
+            indices[scope.call(root_node)] ||= 0
+            set_left_and_rights.call(root_node)
+          end
+        end
+      end
+      
+      # Mixed into both classes and instances to provide easy access to the column names
+      module Columns
+        def left_column_name
+          acts_as_nested_set_options[:left_column]
+        end
+        
+        def right_column_name
+          acts_as_nested_set_options[:right_column]
+        end
+        
+        def parent_column_name
+          acts_as_nested_set_options[:parent_column]
+        end
+        
+        def scope_column_names
+          Array(acts_as_nested_set_options[:scope])
+        end
+        
+        def quoted_left_column_name
+          connection.quote_column_name(left_column_name)
+        end
+        
+        def quoted_right_column_name
+          connection.quote_column_name(right_column_name)
+        end
+        
+        def quoted_parent_column_name
+          connection.quote_column_name(parent_column_name)
+        end
+        
+        def quoted_scope_column_names
+          scope_column_names.collect {|column_name| connection.quote_column_name(column_name) }
+        end
+      end
+
+      # Any instance method that returns a collection makes use of Rails 2.1's named_scope (which is bundled for Rails 2.0), so it can be treated as a finder.
+      #
+      #   category.self_and_descendants.count
+      #   category.ancestors.find(:all, :conditions => "name like '%foo%'")
+      module InstanceMethods
+        # Value of the parent column
+        def parent_id
+          self[parent_column_name]
+        end
+        
+        # Value of the left column
+        def left
+          self[left_column_name]
+        end
+        
+        # Value of the right column
+        def right
+          self[right_column_name]
+        end
+
+        # Returns true if this is a root node.
+        def root?
+          parent_id.nil?
+        end
+        
+        def leaf?
+          right - left == 1
+        end
+
+        # Returns true is this is a child node
+        def child?
+          !parent_id.nil?
+        end
+
+        # order by left column
+        def <=>(x)
+          left <=> x.left
+        end
+        
+        # Redefine to act like active record
+        def ==(comparison_object)
+          comparison_object.equal?(self) ||
+            (comparison_object.instance_of?(self.class) &&
+              comparison_object.id == id &&
+              !comparison_object.new_record?)
+        end
+
+        # Returns root
+        def root
+          self_and_ancestors.find(:first)
+        end
+
+        # Returns the immediate parent
+        def parent
+          nested_set_scope.find_by_id(parent_id) if parent_id
+        end
+
+        # Returns the array of all parents and self
+        def self_and_ancestors
+          nested_set_scope.scoped :conditions => [
+            "#{self.class.table_name}.#{quoted_left_column_name} <= ? AND #{self.class.table_name}.#{quoted_right_column_name} >= ?", left, right
+          ]
+        end
+
+        # Returns an array of all parents
+        def ancestors
+          without_self self_and_ancestors
+        end
+
+        # Returns the array of all children of the parent, including self
+        def self_and_siblings
+          nested_set_scope.scoped :conditions => {parent_column_name => parent_id}
+        end
+
+        # Returns the array of all children of the parent, except self
+        def siblings
+          without_self self_and_siblings
+        end
+
+        # Returns a set of all of its nested children which do not have children  
+        def leaves
+          descendants.scoped :conditions => "#{self.class.table_name}.#{quoted_right_column_name} - #{self.class.table_name}.#{quoted_left_column_name} = 1"
+        end    
+
+        # Returns the level of this object in the tree
+        # root level is 0
+        def level
+          parent_id.nil? ? 0 : ancestors.count
+        end
+
+        # Returns a set of itself and all of its nested children
+        def self_and_descendants
+          nested_set_scope.scoped :conditions => [
+            "#{self.class.table_name}.#{quoted_left_column_name} >= ? AND #{self.class.table_name}.#{quoted_right_column_name} <= ?", left, right
+          ]
+        end
+
+        # Returns a set of all of its children and nested children
+        def descendants
+          without_self self_and_descendants
+        end
+
+        # Returns a set of only this entry's immediate children
+        def children
+          nested_set_scope.scoped :conditions => {parent_column_name => self}
+        end
+
+        def is_descendant_of?(other)
+          other.left < self.left && self.left < other.right && same_scope?(other)
+        end
+        
+        def is_or_is_descendant_of?(other)
+          other.left <= self.left && self.left < other.right && same_scope?(other)
+        end
+
+        def is_ancestor_of?(other)
+          self.left < other.left && other.left < self.right && same_scope?(other)
+        end
+        
+        def is_or_is_ancestor_of?(other)
+          self.left <= other.left && other.left < self.right && same_scope?(other)
+        end
+        
+        # Check if other model is in the same scope
+        def same_scope?(other)
+          Array(acts_as_nested_set_options[:scope]).all? do |attr|
+            self.send(attr) == other.send(attr)
+          end
+        end
+
+        # Find the first sibling to the left
+        def left_sibling
+          siblings.find(:first, :conditions => ["#{self.class.table_name}.#{quoted_left_column_name} < ?", left],
+            :order => "#{self.class.table_name}.#{quoted_left_column_name} DESC")
+        end
+
+        # Find the first sibling to the right
+        def right_sibling
+          siblings.find(:first, :conditions => ["#{self.class.table_name}.#{quoted_left_column_name} > ?", left])
+        end
+
+        # Shorthand method for finding the left sibling and moving to the left of it.
+        def move_left
+          move_to_left_of left_sibling
+        end
+
+        # Shorthand method for finding the right sibling and moving to the right of it.
+        def move_right
+          move_to_right_of right_sibling
+        end
+
+        # Move the node to the left of another node (you can pass id only)
+        def move_to_left_of(node)
+          move_to node, :left
+        end
+
+        # Move the node to the left of another node (you can pass id only)
+        def move_to_right_of(node)
+          move_to node, :right
+        end
+
+        # Move the node to the child of another node (you can pass id only)
+        def move_to_child_of(node)
+          move_to node, :child
+        end
+        
+        # Move the node to root nodes
+        def move_to_root
+          move_to nil, :root
+        end
+        
+        def move_possible?(target)
+          self != target && # Can't target self
+          same_scope?(target) && # can't be in different scopes
+          # !(left..right).include?(target.left..target.right) # this needs tested more
+          # detect impossible move
+          !((left <= target.left && right >= target.left) or (left <= target.right && right >= target.right))
+        end
+        
+        def to_text
+          self_and_descendants.map do |node|
+            "#{'*'*(node.level+1)} #{node.id} #{node.to_s} (#{node.parent_id}, #{node.left}, #{node.right})"
+          end.join("\n")
+        end
+        
+      protected
+      
+        def without_self(scope)
+          scope.scoped :conditions => ["#{self.class.table_name}.#{self.class.primary_key} != ?", self]
+        end
+        
+        # All nested set queries should use this nested_set_scope, which performs finds on
+        # the base ActiveRecord class, using the :scope declared in the acts_as_nested_set
+        # declaration.
+        def nested_set_scope
+          options = {:order => quoted_left_column_name}
+          scopes = Array(acts_as_nested_set_options[:scope])
+          options[:conditions] = scopes.inject({}) do |conditions,attr|
+            conditions.merge attr => self[attr]
+          end unless scopes.empty?
+          self.class.base_class.scoped options
+        end
+        
+        # on creation, set automatically lft and rgt to the end of the tree
+        def set_default_left_and_right
+          maxright = nested_set_scope.maximum(right_column_name) || 0
+          # adds the new node to the right of all existing nodes
+          self[left_column_name] = maxright + 1
+          self[right_column_name] = maxright + 2
+        end
+      
+        # Prunes a branch off of the tree, shifting all of the elements on the right
+        # back to the left so the counts still work.
+        def prune_from_tree
+          return if right.nil? || left.nil?
+          diff = right - left + 1
+
+          delete_method = acts_as_nested_set_options[:dependent] == :destroy ?
+            :destroy_all : :delete_all
+
+          self.class.base_class.transaction do
+            nested_set_scope.send(delete_method,
+              ["#{quoted_left_column_name} > ? AND #{quoted_right_column_name} < ?",
+                left, right]
+            )
+            nested_set_scope.update_all(
+              ["#{quoted_left_column_name} = (#{quoted_left_column_name} - ?)", diff],
+              ["#{quoted_left_column_name} >= ?", right]
+            )
+            nested_set_scope.update_all(
+              ["#{quoted_right_column_name} = (#{quoted_right_column_name} - ?)", diff],
+              ["#{quoted_right_column_name} >= ?", right]
+            )
+          end
+        end
+
+        # reload left, right, and parent
+        def reload_nested_set
+          reload(:select => "#{quoted_left_column_name}, " +
+            "#{quoted_right_column_name}, #{quoted_parent_column_name}")
+        end
+        
+        def move_to(target, position)
+          raise ActiveRecord::ActiveRecordError, "You cannot move a new node" if self.new_record?
+          return if callback(:before_move) == false
+          transaction do
+            if target.is_a? self.class.base_class
+              target.reload_nested_set
+            elsif position != :root
+              # load object if node is not an object
+              target = nested_set_scope.find(target)
+            end
+            self.reload_nested_set
+          
+            unless position == :root || move_possible?(target)
+              raise ActiveRecord::ActiveRecordError, "Impossible move, target node cannot be inside moved tree."
+            end
+            
+            bound = case position
+              when :child;  target[right_column_name]
+              when :left;   target[left_column_name]
+              when :right;  target[right_column_name] + 1
+              when :root;   1
+              else raise ActiveRecord::ActiveRecordError, "Position should be :child, :left, :right or :root ('#{position}' received)."
+            end
+          
+            if bound > self[right_column_name]
+              bound = bound - 1
+              other_bound = self[right_column_name] + 1
+            else
+              other_bound = self[left_column_name] - 1
+            end
+
+            # there would be no change
+            return if bound == self[right_column_name] || bound == self[left_column_name]
+          
+            # we have defined the boundaries of two non-overlapping intervals, 
+            # so sorting puts both the intervals and their boundaries in order
+            a, b, c, d = [self[left_column_name], self[right_column_name], bound, other_bound].sort
+
+            new_parent = case position
+              when :child;  target.id
+              when :root;   nil
+              else          target[parent_column_name]
+            end
+
+            self.class.base_class.update_all([
+              "#{quoted_left_column_name} = CASE " +
+                "WHEN #{quoted_left_column_name} BETWEEN :a AND :b " +
+                  "THEN #{quoted_left_column_name} + :d - :b " +
+                "WHEN #{quoted_left_column_name} BETWEEN :c AND :d " +
+                  "THEN #{quoted_left_column_name} + :a - :c " +
+                "ELSE #{quoted_left_column_name} END, " +
+              "#{quoted_right_column_name} = CASE " +
+                "WHEN #{quoted_right_column_name} BETWEEN :a AND :b " +
+                  "THEN #{quoted_right_column_name} + :d - :b " +
+                "WHEN #{quoted_right_column_name} BETWEEN :c AND :d " +
+                  "THEN #{quoted_right_column_name} + :a - :c " +
+                "ELSE #{quoted_right_column_name} END, " +
+              "#{quoted_parent_column_name} = CASE " +
+                "WHEN #{self.class.base_class.primary_key} = :id THEN :new_parent " +
+                "ELSE #{quoted_parent_column_name} END",
+              {:a => a, :b => b, :c => c, :d => d, :id => self.id, :new_parent => new_parent}
+            ], nested_set_scope.proxy_options[:conditions])
+          end
+          target.reload_nested_set if target
+          self.reload_nested_set
+          callback(:after_move)
+        end
+
+      end
+      
+    end
+  end
+end
diff --git a/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/compatability.rb b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/compatability.rb
new file mode 100644
index 000000000..2d11da330
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/compatability.rb
@@ -0,0 +1,29 @@
+# Rails <2.x doesn't define #except
+class Hash #:nodoc:
+  # Returns a new hash without the given keys.
+  def except(*keys)
+    clone.except!(*keys)
+  end unless method_defined?(:except)
+
+  # Replaces the hash without the given keys.
+  def except!(*keys)
+    keys.map! { |key| convert_key(key) } if respond_to?(:convert_key)
+    keys.each { |key| delete(key) }
+    self
+  end unless method_defined?(:except!)
+end
+
+# NamedScope is new to Rails 2.1
+unless defined? ActiveRecord::NamedScope
+  require 'awesome_nested_set/named_scope'
+  ActiveRecord::Base.class_eval do
+    include CollectiveIdea::NamedScope
+  end
+end
+
+# Rails 1.2.x doesn't define #quoted_table_name
+class ActiveRecord::Base  #:nodoc:
+  def self.quoted_table_name
+    self.connection.quote_column_name(self.table_name)
+  end unless methods.include?('quoted_table_name')
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/helper.rb b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/helper.rb
new file mode 100644
index 000000000..09c803fd0
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/helper.rb
@@ -0,0 +1,40 @@
+module CollectiveIdea #:nodoc:
+  module Acts #:nodoc:
+    module NestedSet #:nodoc:
+      # This module provides some helpers for the model classes using acts_as_nested_set.
+      # It is included by default in all views.
+      #
+      module Helper
+        # Returns options for select.
+        # You can exclude some items from the tree.
+        # You can pass a block receiving an item and returning the string displayed in the select.
+        #
+        # == Params
+        #  * +class_or_item+ - Class name or top level times
+        #  * +mover+ - The item that is being move, used to exlude impossible moves
+        #  * +&block+ - a block that will be used to display: { |item| ... item.name }
+        #
+        # == Usage
+        #
+        #   <%= f.select :parent_id, nested_set_options(Category, @category) {|i|
+        #       "#{'–' * i.level} #{i.name}"
+        #     }) %>
+        #
+        def nested_set_options(class_or_item, mover = nil)
+          class_or_item = class_or_item.roots if class_or_item.is_a?(Class)
+          items = Array(class_or_item)
+          result = []
+          items.each do |root|
+            result += root.self_and_descendants.map do |i|
+              if mover.nil? || mover.new_record? || mover.move_possible?(i)
+                [yield(i), i.id]
+              end
+            end.compact
+          end
+          result
+        end  
+        
+      end
+    end  
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/named_scope.rb b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/named_scope.rb
new file mode 100644
index 000000000..1836498bd
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/lib/awesome_nested_set/named_scope.rb
@@ -0,0 +1,140 @@
+# Taken from Rails 2.1
+module CollectiveIdea #:nodoc:
+  module NamedScope #:nodoc:
+    # All subclasses of ActiveRecord::Base have two named_scopes:
+    # * <tt>all</tt>, which is similar to a <tt>find(:all)</tt> query, and
+    # * <tt>scoped</tt>, which allows for the creation of anonymous scopes, on the fly:
+    #
+    #   Shirt.scoped(:conditions => {:color => 'red'}).scoped(:include => :washing_instructions)
+    #
+    # These anonymous scopes tend to be useful when procedurally generating complex queries, where passing
+    # intermediate values (scopes) around as first-class objects is convenient.
+    def self.included(base)
+      base.class_eval do
+        extend ClassMethods
+        named_scope :scoped, lambda { |scope| scope }
+      end
+    end
+
+    module ClassMethods #:nodoc:
+      def scopes
+        read_inheritable_attribute(:scopes) || write_inheritable_attribute(:scopes, {})
+      end
+
+      # Adds a class method for retrieving and querying objects. A scope represents a narrowing of a database query,
+      # such as <tt>:conditions => {:color => :red}, :select => 'shirts.*', :include => :washing_instructions</tt>.
+      #
+      #   class Shirt < ActiveRecord::Base
+      #     named_scope :red, :conditions => {:color => 'red'}
+      #     named_scope :dry_clean_only, :joins => :washing_instructions, :conditions => ['washing_instructions.dry_clean_only = ?', true]
+      #   end
+      # 
+      # The above calls to <tt>named_scope</tt> define class methods <tt>Shirt.red</tt> and <tt>Shirt.dry_clean_only</tt>. <tt>Shirt.red</tt>, 
+      # in effect, represents the query <tt>Shirt.find(:all, :conditions => {:color => 'red'})</tt>.
+      #
+      # Unlike Shirt.find(...), however, the object returned by <tt>Shirt.red</tt> is not an Array; it resembles the association object
+      # constructed by a <tt>has_many</tt> declaration. For instance, you can invoke <tt>Shirt.red.find(:first)</tt>, <tt>Shirt.red.count</tt>,
+      # <tt>Shirt.red.find(:all, :conditions => {:size => 'small'})</tt>. Also, just
+      # as with the association objects, name scopes acts like an Array, implementing Enumerable; <tt>Shirt.red.each(&block)</tt>,
+      # <tt>Shirt.red.first</tt>, and <tt>Shirt.red.inject(memo, &block)</tt> all behave as if Shirt.red really were an Array.
+      #
+      # These named scopes are composable. For instance, <tt>Shirt.red.dry_clean_only</tt> will produce all shirts that are both red and dry clean only.
+      # Nested finds and calculations also work with these compositions: <tt>Shirt.red.dry_clean_only.count</tt> returns the number of garments
+      # for which these criteria obtain. Similarly with <tt>Shirt.red.dry_clean_only.average(:thread_count)</tt>.
+      #
+      # All scopes are available as class methods on the ActiveRecord descendent upon which the scopes were defined. But they are also available to
+      # <tt>has_many</tt> associations. If,
+      #
+      #   class Person < ActiveRecord::Base
+      #     has_many :shirts
+      #   end
+      #
+      # then <tt>elton.shirts.red.dry_clean_only</tt> will return all of Elton's red, dry clean
+      # only shirts.
+      #
+      # Named scopes can also be procedural.
+      #
+      #   class Shirt < ActiveRecord::Base
+      #     named_scope :colored, lambda { |color|
+      #       { :conditions => { :color => color } }
+      #     }
+      #   end
+      #
+      # In this example, <tt>Shirt.colored('puce')</tt> finds all puce shirts.
+      #
+      # Named scopes can also have extensions, just as with <tt>has_many</tt> declarations:
+      #
+      #   class Shirt < ActiveRecord::Base
+      #     named_scope :red, :conditions => {:color => 'red'} do
+      #       def dom_id
+      #         'red_shirts'
+      #       end
+      #     end
+      #   end
+      #
+      #
+      # For testing complex named scopes, you can examine the scoping options using the
+      # <tt>proxy_options</tt> method on the proxy itself.
+      #
+      #   class Shirt < ActiveRecord::Base
+      #     named_scope :colored, lambda { |color|
+      #       { :conditions => { :color => color } }
+      #     }
+      #   end
+      #
+      #   expected_options = { :conditions => { :colored => 'red' } }
+      #   assert_equal expected_options, Shirt.colored('red').proxy_options
+      def named_scope(name, options = {}, &block)
+        scopes[name] = lambda do |parent_scope, *args|
+          Scope.new(parent_scope, case options
+            when Hash
+              options
+            when Proc
+              options.call(*args)
+          end, &block)
+        end
+        (class << self; self end).instance_eval do
+          define_method name do |*args|
+            scopes[name].call(self, *args)
+          end
+        end
+      end
+    end
+
+    class Scope #:nodoc:
+      attr_reader :proxy_scope, :proxy_options
+      [].methods.each { |m| delegate m, :to => :proxy_found unless m =~ /(^__|^nil\?|^send|class|extend|find|count|sum|average|maximum|minimum|paginate)/ }
+      delegate :scopes, :with_scope, :to => :proxy_scope
+
+      def initialize(proxy_scope, options, &block)
+        [options[:extend]].flatten.each { |extension| extend extension } if options[:extend]
+        extend Module.new(&block) if block_given?
+        @proxy_scope, @proxy_options = proxy_scope, options.except(:extend)
+      end
+
+      def reload
+        load_found; self
+      end
+
+      protected
+      def proxy_found
+        @found || load_found
+      end
+
+      private
+      def method_missing(method, *args, &block)
+        if scopes.include?(method)
+          scopes[method].call(self, *args)
+        else
+          with_scope :find => proxy_options do
+            proxy_scope.send(method, *args, &block)
+          end
+        end
+      end
+
+      def load_found
+        @found = find(:all)
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/rails/init.rb b/vendor/plugins/awesome_nested_set/rails/init.rb
new file mode 100644
index 000000000..e0a4e8b06
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/rails/init.rb
@@ -0,0 +1,13 @@
+require 'awesome_nested_set/compatability'
+require 'awesome_nested_set'
+
+ActiveRecord::Base.class_eval do
+  include CollectiveIdea::Acts::NestedSet
+end
+
+if defined?(ActionView)
+  require 'awesome_nested_set/helper'
+  ActionView::Base.class_eval do
+    include CollectiveIdea::Acts::NestedSet::Helper
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/test/awesome_nested_set/helper_test.rb b/vendor/plugins/awesome_nested_set/test/awesome_nested_set/helper_test.rb
new file mode 100644
index 000000000..6122a0e60
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/awesome_nested_set/helper_test.rb
@@ -0,0 +1,41 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+module CollectiveIdea
+  module Acts #:nodoc:
+    module NestedSet #:nodoc:
+      class AwesomeNestedSetTest < Test::Unit::TestCase
+        include Helper
+        fixtures :categories
+        
+        def test_nested_set_options
+          expected = [
+            [" Top Level", 1],
+            ["- Child 1", 2],
+            ['- Child 2', 3],
+            ['-- Child 2.1', 4],
+            ['- Child 3', 5],
+            [" Top Level 2", 6]
+          ]
+          actual = nested_set_options(Category) do |c|
+            "#{'-' * c.level} #{c.name}"
+          end
+          assert_equal expected, actual
+        end
+        
+        def test_nested_set_options_with_mover
+          expected = [
+            [" Top Level", 1],
+            ["- Child 1", 2],
+            ['- Child 3', 5],
+            [" Top Level 2", 6]
+          ]
+          actual = nested_set_options(Category, categories(:child_2)) do |c|
+            "#{'-' * c.level} #{c.name}"
+          end
+          assert_equal expected, actual
+        end
+        
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/test/awesome_nested_set_test.rb b/vendor/plugins/awesome_nested_set/test/awesome_nested_set_test.rb
new file mode 100644
index 000000000..5252d804e
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/awesome_nested_set_test.rb
@@ -0,0 +1,603 @@
+require File.dirname(__FILE__) + '/test_helper'
+
+class Note < ActiveRecord::Base
+  acts_as_nested_set :scope => [:notable_id, :notable_type]
+end
+
+class AwesomeNestedSetTest < Test::Unit::TestCase
+
+  class Default < ActiveRecord::Base
+    acts_as_nested_set
+    set_table_name 'categories'
+  end
+  class Scoped < ActiveRecord::Base
+    acts_as_nested_set :scope => :organization
+    set_table_name 'categories'
+  end
+
+  def test_left_column_default
+    assert_equal 'lft', Default.acts_as_nested_set_options[:left_column]
+  end
+
+  def test_right_column_default
+    assert_equal 'rgt', Default.acts_as_nested_set_options[:right_column]
+  end
+
+  def test_parent_column_default
+    assert_equal 'parent_id', Default.acts_as_nested_set_options[:parent_column]
+  end
+
+  def test_scope_default
+    assert_nil Default.acts_as_nested_set_options[:scope]
+  end
+  
+  def test_left_column_name
+    assert_equal 'lft', Default.left_column_name
+    assert_equal 'lft', Default.new.left_column_name
+  end
+
+  def test_right_column_name
+    assert_equal 'rgt', Default.right_column_name
+    assert_equal 'rgt', Default.new.right_column_name
+  end
+
+  def test_parent_column_name
+    assert_equal 'parent_id', Default.parent_column_name
+    assert_equal 'parent_id', Default.new.parent_column_name
+  end
+  
+  def test_quoted_left_column_name
+    quoted = Default.connection.quote_column_name('lft')
+    assert_equal quoted, Default.quoted_left_column_name
+    assert_equal quoted, Default.new.quoted_left_column_name
+  end
+
+  def test_quoted_right_column_name
+    quoted = Default.connection.quote_column_name('rgt')
+    assert_equal quoted, Default.quoted_right_column_name
+    assert_equal quoted, Default.new.quoted_right_column_name
+  end
+
+  def test_left_column_protected_from_assignment
+    assert_raises(ActiveRecord::ActiveRecordError) { Category.new.lft = 1 }
+  end
+  
+  def test_right_column_protected_from_assignment
+    assert_raises(ActiveRecord::ActiveRecordError) { Category.new.rgt = 1 }
+  end
+  
+  def test_parent_column_protected_from_assignment
+    assert_raises(ActiveRecord::ActiveRecordError) { Category.new.parent_id = 1 }
+  end
+  
+  def test_colums_protected_on_initialize
+    c = Category.new(:lft => 1, :rgt => 2, :parent_id => 3)
+    assert_nil c.lft
+    assert_nil c.rgt
+    assert_nil c.parent_id
+  end
+  
+  def test_scoped_appends_id
+    assert_equal :organization_id, Scoped.acts_as_nested_set_options[:scope]
+  end
+  
+  def test_roots_class_method
+    assert_equal Category.find_all_by_parent_id(nil), Category.roots
+  end
+    
+  def test_root_class_method
+    assert_equal categories(:top_level), Category.root
+  end
+  
+  def test_root
+    assert_equal categories(:top_level), categories(:child_3).root
+  end
+  
+  def test_root?
+    assert categories(:top_level).root?
+    assert categories(:top_level_2).root?
+  end
+  
+  def test_leaves_class_method
+    assert_equal Category.find(:all, :conditions => "#{Category.right_column_name} - #{Category.left_column_name} = 1"), Category.leaves
+    assert_equal Category.leaves.count, 4
+    assert (Category.leaves.include? categories(:child_1))
+    assert (Category.leaves.include? categories(:child_2_1))
+    assert (Category.leaves.include? categories(:child_3))
+    assert (Category.leaves.include? categories(:top_level_2))
+  end
+  
+  def test_leaf
+    assert categories(:child_1).leaf?
+    assert categories(:child_2_1).leaf?
+    assert categories(:child_3).leaf?
+    assert categories(:top_level_2).leaf?
+    
+    assert !categories(:top_level).leaf?
+    assert !categories(:child_2).leaf?
+  end
+    
+  def test_parent
+    assert_equal categories(:child_2), categories(:child_2_1).parent
+  end
+  
+  def test_self_and_ancestors
+    child = categories(:child_2_1)
+    self_and_ancestors = [categories(:top_level), categories(:child_2), child]
+    assert_equal self_and_ancestors, child.self_and_ancestors
+  end
+
+  def test_ancestors
+    child = categories(:child_2_1)
+    ancestors = [categories(:top_level), categories(:child_2)]
+    assert_equal ancestors, child.ancestors
+  end
+  
+  def test_self_and_siblings
+    child = categories(:child_2)
+    self_and_siblings = [categories(:child_1), child, categories(:child_3)]
+    assert_equal self_and_siblings, child.self_and_siblings
+    assert_nothing_raised do
+      tops = [categories(:top_level), categories(:top_level_2)]
+      assert_equal tops, categories(:top_level).self_and_siblings
+    end
+  end
+
+  def test_siblings
+    child = categories(:child_2)
+    siblings = [categories(:child_1), categories(:child_3)]
+    assert_equal siblings, child.siblings
+  end
+  
+  def test_leaves
+    leaves = [categories(:child_1), categories(:child_2_1), categories(:child_3), categories(:top_level_2)]
+    assert categories(:top_level).leaves, leaves
+  end
+  
+  def test_level
+    assert_equal 0, categories(:top_level).level
+    assert_equal 1, categories(:child_1).level
+    assert_equal 2, categories(:child_2_1).level
+  end
+  
+  def test_has_children?
+    assert categories(:child_2_1).children.empty?
+    assert !categories(:child_2).children.empty?
+    assert !categories(:top_level).children.empty?
+  end
+  
+  def test_self_and_descendents
+    parent = categories(:top_level)
+    self_and_descendants = [parent, categories(:child_1), categories(:child_2),
+      categories(:child_2_1), categories(:child_3)]
+    assert_equal self_and_descendants, parent.self_and_descendants
+    assert_equal self_and_descendants, parent.self_and_descendants.count
+  end
+  
+  def test_descendents
+    lawyers = Category.create!(:name => "lawyers")
+    us = Category.create!(:name => "United States")
+    us.move_to_child_of(lawyers)
+    patent = Category.create!(:name => "Patent Law")
+    patent.move_to_child_of(us)
+    lawyers.reload
+
+    assert_equal 1, lawyers.children.size
+    assert_equal 1, us.children.size
+    assert_equal 2, lawyers.descendants.size
+  end
+  
+  def test_self_and_descendents
+    parent = categories(:top_level)
+    descendants = [categories(:child_1), categories(:child_2),
+      categories(:child_2_1), categories(:child_3)]
+    assert_equal descendants, parent.descendants
+  end
+  
+  def test_children
+    category = categories(:top_level)
+    category.children.each {|c| assert_equal category.id, c.parent_id }
+  end
+  
+  def test_is_or_is_ancestor_of?
+    assert categories(:top_level).is_or_is_ancestor_of?(categories(:child_1))
+    assert categories(:top_level).is_or_is_ancestor_of?(categories(:child_2_1))
+    assert categories(:child_2).is_or_is_ancestor_of?(categories(:child_2_1))
+    assert !categories(:child_2_1).is_or_is_ancestor_of?(categories(:child_2))
+    assert !categories(:child_1).is_or_is_ancestor_of?(categories(:child_2))
+    assert categories(:child_1).is_or_is_ancestor_of?(categories(:child_1))
+  end
+  
+  def test_is_ancestor_of?
+    assert categories(:top_level).is_ancestor_of?(categories(:child_1))
+    assert categories(:top_level).is_ancestor_of?(categories(:child_2_1))
+    assert categories(:child_2).is_ancestor_of?(categories(:child_2_1))
+    assert !categories(:child_2_1).is_ancestor_of?(categories(:child_2))
+    assert !categories(:child_1).is_ancestor_of?(categories(:child_2))
+    assert !categories(:child_1).is_ancestor_of?(categories(:child_1))
+  end
+
+  def test_is_or_is_ancestor_of_with_scope
+    root = Scoped.root
+    child = root.children.first
+    assert root.is_or_is_ancestor_of?(child)
+    child.update_attribute :organization_id, 'different'
+    assert !root.is_or_is_ancestor_of?(child)
+  end
+
+  def test_is_or_is_descendant_of?
+    assert categories(:child_1).is_or_is_descendant_of?(categories(:top_level))
+    assert categories(:child_2_1).is_or_is_descendant_of?(categories(:top_level))
+    assert categories(:child_2_1).is_or_is_descendant_of?(categories(:child_2))
+    assert !categories(:child_2).is_or_is_descendant_of?(categories(:child_2_1))
+    assert !categories(:child_2).is_or_is_descendant_of?(categories(:child_1))
+    assert categories(:child_1).is_or_is_descendant_of?(categories(:child_1))
+  end
+  
+  def test_is_descendant_of?
+    assert categories(:child_1).is_descendant_of?(categories(:top_level))
+    assert categories(:child_2_1).is_descendant_of?(categories(:top_level))
+    assert categories(:child_2_1).is_descendant_of?(categories(:child_2))
+    assert !categories(:child_2).is_descendant_of?(categories(:child_2_1))
+    assert !categories(:child_2).is_descendant_of?(categories(:child_1))
+    assert !categories(:child_1).is_descendant_of?(categories(:child_1))
+  end
+  
+  def test_is_or_is_descendant_of_with_scope
+    root = Scoped.root
+    child = root.children.first
+    assert child.is_or_is_descendant_of?(root)
+    child.update_attribute :organization_id, 'different'
+    assert !child.is_or_is_descendant_of?(root)
+  end
+  
+  def test_same_scope?
+    root = Scoped.root
+    child = root.children.first
+    assert child.same_scope?(root)
+    child.update_attribute :organization_id, 'different'
+    assert !child.same_scope?(root)
+  end
+  
+  def test_left_sibling
+    assert_equal categories(:child_1), categories(:child_2).left_sibling
+    assert_equal categories(:child_2), categories(:child_3).left_sibling
+  end
+
+  def test_left_sibling_of_root
+    assert_nil categories(:top_level).left_sibling
+  end
+
+  def test_left_sibling_without_siblings
+    assert_nil categories(:child_2_1).left_sibling
+  end
+
+  def test_left_sibling_of_leftmost_node
+    assert_nil categories(:child_1).left_sibling
+  end
+
+  def test_right_sibling
+    assert_equal categories(:child_3), categories(:child_2).right_sibling
+    assert_equal categories(:child_2), categories(:child_1).right_sibling
+  end
+
+  def test_right_sibling_of_root
+    assert_equal categories(:top_level_2), categories(:top_level).right_sibling
+    assert_nil categories(:top_level_2).right_sibling
+  end
+
+  def test_right_sibling_without_siblings
+    assert_nil categories(:child_2_1).right_sibling
+  end
+
+  def test_right_sibling_of_rightmost_node
+    assert_nil categories(:child_3).right_sibling
+  end
+  
+  def test_move_left
+    categories(:child_2).move_left
+    assert_nil categories(:child_2).left_sibling
+    assert_equal categories(:child_1), categories(:child_2).right_sibling
+    assert Category.valid?
+  end
+
+  def test_move_right
+    categories(:child_2).move_right
+    assert_nil categories(:child_2).right_sibling
+    assert_equal categories(:child_3), categories(:child_2).left_sibling
+    assert Category.valid?
+  end
+
+  def test_move_to_left_of
+    categories(:child_3).move_to_left_of(categories(:child_1))
+    assert_nil categories(:child_3).left_sibling
+    assert_equal categories(:child_1), categories(:child_3).right_sibling
+    assert Category.valid?
+  end
+
+  def test_move_to_right_of
+    categories(:child_1).move_to_right_of(categories(:child_3))
+    assert_nil categories(:child_1).right_sibling
+    assert_equal categories(:child_3), categories(:child_1).left_sibling
+    assert Category.valid?
+  end
+  
+  def test_move_to_root
+    categories(:child_2).move_to_root
+    assert_nil categories(:child_2).parent
+    assert_equal 0, categories(:child_2).level
+    assert_equal 1, categories(:child_2_1).level
+    assert_equal 1, categories(:child_2).left
+    assert_equal 4, categories(:child_2).right
+    assert Category.valid?
+  end
+
+  def test_move_to_child_of
+    categories(:child_1).move_to_child_of(categories(:child_3))
+    assert_equal categories(:child_3).id, categories(:child_1).parent_id
+    assert Category.valid?
+  end
+  
+  def test_move_to_child_of_appends_to_end
+    child = Category.create! :name => 'New Child'
+    child.move_to_child_of categories(:top_level)
+    assert_equal child, categories(:top_level).children.last
+  end
+  
+  def test_subtree_move_to_child_of
+    assert_equal 4, categories(:child_2).left
+    assert_equal 7, categories(:child_2).right
+    
+    assert_equal 2, categories(:child_1).left
+    assert_equal 3, categories(:child_1).right
+    
+    categories(:child_2).move_to_child_of(categories(:child_1))
+    assert Category.valid?
+    assert_equal categories(:child_1).id, categories(:child_2).parent_id
+    
+    assert_equal 3, categories(:child_2).left
+    assert_equal 6, categories(:child_2).right
+    assert_equal 2, categories(:child_1).left
+    assert_equal 7, categories(:child_1).right    
+  end
+  
+  def test_slightly_difficult_move_to_child_of
+    assert_equal 11, categories(:top_level_2).left
+    assert_equal 12, categories(:top_level_2).right
+    
+    # create a new top-level node and move single-node top-level tree inside it.
+    new_top = Category.create(:name => 'New Top')
+    assert_equal 13, new_top.left
+    assert_equal 14, new_top.right
+    
+    categories(:top_level_2).move_to_child_of(new_top)
+    
+    assert Category.valid?
+    assert_equal new_top.id, categories(:top_level_2).parent_id
+    
+    assert_equal 12, categories(:top_level_2).left
+    assert_equal 13, categories(:top_level_2).right
+    assert_equal 11, new_top.left
+    assert_equal 14, new_top.right    
+  end
+  
+  def test_difficult_move_to_child_of
+    assert_equal 1, categories(:top_level).left
+    assert_equal 10, categories(:top_level).right
+    assert_equal 5, categories(:child_2_1).left
+    assert_equal 6, categories(:child_2_1).right
+    
+    # create a new top-level node and move an entire top-level tree inside it.
+    new_top = Category.create(:name => 'New Top')
+    categories(:top_level).move_to_child_of(new_top)
+    categories(:child_2_1).reload
+    assert Category.valid?  
+    assert_equal new_top.id, categories(:top_level).parent_id
+    
+    assert_equal 4, categories(:top_level).left
+    assert_equal 13, categories(:top_level).right
+    assert_equal 8, categories(:child_2_1).left
+    assert_equal 9, categories(:child_2_1).right    
+  end
+
+  #rebuild swaps the position of the 2 children when added using move_to_child twice onto same parent
+  def test_move_to_child_more_than_once_per_parent_rebuild
+    root1 = Category.create(:name => 'Root1')
+    root2 = Category.create(:name => 'Root2')
+    root3 = Category.create(:name => 'Root3')
+    
+    root2.move_to_child_of root1
+    root3.move_to_child_of root1
+      
+    output = Category.roots.last.to_text
+    Category.update_all('lft = null, rgt = null')
+    Category.rebuild!
+    
+    assert_equal Category.roots.last.to_text, output
+  end
+  
+  # doing move_to_child twice onto same parent from the furthest right first
+  def test_move_to_child_more_than_once_per_parent_outside_in
+    node1 = Category.create(:name => 'Node-1')
+    node2 = Category.create(:name => 'Node-2')
+    node3 = Category.create(:name => 'Node-3')
+    
+    node2.move_to_child_of node1
+    node3.move_to_child_of node1
+      
+    output = Category.roots.last.to_text
+    Category.update_all('lft = null, rgt = null')
+    Category.rebuild!
+    
+    assert_equal Category.roots.last.to_text, output
+  end
+
+
+  def test_valid_with_null_lefts
+    assert Category.valid?
+    Category.update_all('lft = null')
+    assert !Category.valid?
+  end
+
+  def test_valid_with_null_rights
+    assert Category.valid?
+    Category.update_all('rgt = null')
+    assert !Category.valid?
+  end
+  
+  def test_valid_with_missing_intermediate_node
+    # Even though child_2_1 will still exist, it is a sign of a sloppy delete, not an invalid tree.
+    assert Category.valid?
+    Category.delete(categories(:child_2).id)
+    assert Category.valid?
+  end
+  
+  def test_valid_with_overlapping_and_rights
+    assert Category.valid?
+    categories(:top_level_2)['lft'] = 0
+    categories(:top_level_2).save
+    assert !Category.valid?
+  end
+  
+  def test_rebuild
+    assert Category.valid?
+    before_text = Category.root.to_text
+    Category.update_all('lft = null, rgt = null')
+    Category.rebuild!
+    assert Category.valid?
+    assert_equal before_text, Category.root.to_text
+  end
+  
+  def test_move_possible_for_sibling
+    assert categories(:child_2).move_possible?(categories(:child_1))
+  end
+  
+  def test_move_not_possible_to_self
+    assert !categories(:top_level).move_possible?(categories(:top_level))
+  end
+  
+  def test_move_not_possible_to_parent
+    categories(:top_level).descendants.each do |descendant|
+      assert !categories(:top_level).move_possible?(descendant)
+      assert descendant.move_possible?(categories(:top_level))
+    end
+  end
+  
+  def test_is_or_is_ancestor_of?
+    [:child_1, :child_2, :child_2_1, :child_3].each do |c|
+      assert categories(:top_level).is_or_is_ancestor_of?(categories(c))
+    end
+    assert !categories(:top_level).is_or_is_ancestor_of?(categories(:top_level_2))
+  end
+  
+  def test_left_and_rights_valid_with_blank_left
+    assert Category.left_and_rights_valid?
+    categories(:child_2)[:lft] = nil
+    categories(:child_2).save(false)
+    assert !Category.left_and_rights_valid?
+  end
+
+  def test_left_and_rights_valid_with_blank_right
+    assert Category.left_and_rights_valid?
+    categories(:child_2)[:rgt] = nil
+    categories(:child_2).save(false)
+    assert !Category.left_and_rights_valid?
+  end
+
+  def test_left_and_rights_valid_with_equal
+    assert Category.left_and_rights_valid?
+    categories(:top_level_2)[:lft] = categories(:top_level_2)[:rgt]
+    categories(:top_level_2).save(false)
+    assert !Category.left_and_rights_valid?
+  end
+
+  def test_left_and_rights_valid_with_left_equal_to_parent
+    assert Category.left_and_rights_valid?
+    categories(:child_2)[:lft] = categories(:top_level)[:lft]
+    categories(:child_2).save(false)
+    assert !Category.left_and_rights_valid?
+  end
+
+  def test_left_and_rights_valid_with_right_equal_to_parent
+    assert Category.left_and_rights_valid?
+    categories(:child_2)[:rgt] = categories(:top_level)[:rgt]
+    categories(:child_2).save(false)
+    assert !Category.left_and_rights_valid?
+  end
+  
+  def test_moving_dirty_objects_doesnt_invalidate_tree
+    r1 = Category.create
+    r2 = Category.create
+    r3 = Category.create
+    r4 = Category.create
+    nodes = [r1, r2, r3, r4]
+    
+    r2.move_to_child_of(r1)
+    assert Category.valid?
+    
+    r3.move_to_child_of(r1)
+    assert Category.valid?
+    
+    r4.move_to_child_of(r2)
+    assert Category.valid?
+  end
+  
+  def test_multi_scoped_no_duplicates_for_columns?
+    assert_nothing_raised do
+      Note.no_duplicates_for_columns?
+    end
+  end
+
+  def test_multi_scoped_all_roots_valid?
+    assert_nothing_raised do
+      Note.all_roots_valid?
+    end
+  end
+
+  def test_multi_scoped
+    note1 = Note.create!(:body => "A", :notable_id => 2, :notable_type => 'Category')
+    note2 = Note.create!(:body => "B", :notable_id => 2, :notable_type => 'Category')
+    note3 = Note.create!(:body => "C", :notable_id => 2, :notable_type => 'Default')
+    
+    assert_equal [note1, note2], note1.self_and_siblings
+    assert_equal [note3], note3.self_and_siblings
+  end
+  
+  def test_multi_scoped_rebuild
+    root = Note.create!(:body => "A", :notable_id => 3, :notable_type => 'Category')
+    child1 = Note.create!(:body => "B", :notable_id => 3, :notable_type => 'Category')
+    child2 = Note.create!(:body => "C", :notable_id => 3, :notable_type => 'Category')
+    
+    child1.move_to_child_of root
+    child2.move_to_child_of root
+          
+    Note.update_all('lft = null, rgt = null')
+    Note.rebuild!
+    
+    assert_equal Note.roots.find_by_body('A'), root
+    assert_equal [child1, child2], Note.roots.find_by_body('A').children
+  end
+  
+  def test_same_scope_with_multi_scopes
+    assert_nothing_raised do
+      notes(:scope1).same_scope?(notes(:child_1))
+    end
+    assert notes(:scope1).same_scope?(notes(:child_1))
+    assert notes(:child_1).same_scope?(notes(:scope1))
+    assert !notes(:scope1).same_scope?(notes(:scope2))
+  end
+  
+  def test_quoting_of_multi_scope_column_names
+    assert_equal ["\"notable_id\"", "\"notable_type\""], Note.quoted_scope_column_names
+  end
+  
+  def test_equal_in_same_scope
+    assert_equal notes(:scope1), notes(:scope1)
+    assert_not_equal notes(:scope1), notes(:child_1)
+  end
+  
+  def test_equal_in_different_scopes
+    assert_not_equal notes(:scope1), notes(:scope2)
+  end
+  
+end
diff --git a/vendor/plugins/awesome_nested_set/test/db/database.yml b/vendor/plugins/awesome_nested_set/test/db/database.yml
new file mode 100644
index 000000000..9281236d2
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/db/database.yml
@@ -0,0 +1,18 @@
+sqlite3:
+  adapter: sqlite3
+  dbfile: awesome_nested_set.sqlite3.db
+sqlite3mem:
+  :adapter: sqlite3
+  :dbfile: ":memory:"
+postgresql:
+  :adapter: postgresql
+  :username: postgres
+  :password: postgres
+  :database: awesome_nested_set_plugin_test
+  :min_messages: ERROR
+mysql:
+  :adapter: mysql
+  :host: localhost
+  :username: root
+  :password:
+  :database: awesome_nested_set_plugin_test
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/test/db/schema.rb b/vendor/plugins/awesome_nested_set/test/db/schema.rb
new file mode 100644
index 000000000..bbed1eb16
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/db/schema.rb
@@ -0,0 +1,23 @@
+ActiveRecord::Schema.define(:version => 0) do
+
+  create_table :categories, :force => true do |t|
+    t.column :name, :string
+    t.column :parent_id, :integer
+    t.column :lft, :integer
+    t.column :rgt, :integer
+    t.column :organization_id, :integer
+  end
+
+  create_table :departments, :force => true do |t|
+    t.column :name, :string
+  end
+  
+  create_table :notes, :force => true do |t|
+    t.column :body, :text
+    t.column :parent_id, :integer
+    t.column :lft, :integer
+    t.column :rgt, :integer
+    t.column :notable_id, :integer
+    t.column :notable_type, :string
+  end
+end
diff --git a/vendor/plugins/awesome_nested_set/test/fixtures/categories.yml b/vendor/plugins/awesome_nested_set/test/fixtures/categories.yml
new file mode 100644
index 000000000..bc8e078e8
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/fixtures/categories.yml
@@ -0,0 +1,34 @@
+top_level:
+  id: 1
+  name: Top Level
+  lft: 1
+  rgt: 10
+child_1:
+  id: 2
+  name: Child 1
+  parent_id: 1
+  lft: 2
+  rgt: 3
+child_2:
+  id: 3
+  name: Child 2
+  parent_id: 1
+  lft: 4
+  rgt: 7
+child_2_1:
+  id: 4
+  name: Child 2.1
+  parent_id: 3
+  lft: 5
+  rgt: 6
+child_3:
+  id: 5
+  name: Child 3
+  parent_id: 1
+  lft: 8
+  rgt: 9
+top_level_2:
+  id: 6
+  name: Top Level 2
+  lft: 11
+  rgt: 12
diff --git a/vendor/plugins/awesome_nested_set/test/fixtures/category.rb b/vendor/plugins/awesome_nested_set/test/fixtures/category.rb
new file mode 100644
index 000000000..506b0dac5
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/fixtures/category.rb
@@ -0,0 +1,15 @@
+class Category < ActiveRecord::Base
+  acts_as_nested_set
+  
+  def to_s
+    name
+  end
+  
+  def recurse &block
+    block.call self, lambda{
+      self.children.each do |child|
+        child.recurse &block
+      end
+    }
+  end
+end
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/test/fixtures/departments.yml b/vendor/plugins/awesome_nested_set/test/fixtures/departments.yml
new file mode 100644
index 000000000..e50a944f1
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/fixtures/departments.yml
@@ -0,0 +1,3 @@
+top:
+  id: 1
+  name: Top
\ No newline at end of file
diff --git a/vendor/plugins/awesome_nested_set/test/fixtures/notes.yml b/vendor/plugins/awesome_nested_set/test/fixtures/notes.yml
new file mode 100644
index 000000000..004a5335a
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/fixtures/notes.yml
@@ -0,0 +1,38 @@
+scope1:
+  id: 1
+  body: Top Level
+  lft: 1
+  rgt: 10
+  notable_id: 1
+  notable_type: Category
+child_1:
+  id: 2
+  body: Child 1
+  parent_id: 1
+  lft: 2
+  rgt: 3
+  notable_id: 1
+  notable_type: Category
+child_2:
+  id: 3
+  body: Child 2
+  parent_id: 1
+  lft: 4
+  rgt: 7
+  notable_id: 1
+  notable_type: Category
+child_3:
+  id: 4
+  body: Child 3
+  parent_id: 1
+  lft: 8
+  rgt: 9
+  notable_id: 1
+  notable_type: Category
+scope2:
+  id: 5
+  body: Top Level 2
+  lft: 1
+  rgt: 2
+  notable_id: 1
+  notable_type: Departments
diff --git a/vendor/plugins/awesome_nested_set/test/test_helper.rb b/vendor/plugins/awesome_nested_set/test/test_helper.rb
new file mode 100644
index 000000000..693982236
--- /dev/null
+++ b/vendor/plugins/awesome_nested_set/test/test_helper.rb
@@ -0,0 +1,31 @@
+$:.unshift(File.dirname(__FILE__) + '/../lib')
+plugin_test_dir = File.dirname(__FILE__)
+
+require 'rubygems'
+require 'test/unit'
+require 'multi_rails_init'
+# gem 'activerecord', '>= 2.0'
+require 'active_record' 
+require 'action_controller'
+require 'action_view'
+require 'active_record/fixtures'
+
+require plugin_test_dir + '/../init.rb'
+
+ActiveRecord::Base.logger = Logger.new(plugin_test_dir + "/debug.log")
+
+ActiveRecord::Base.configurations = YAML::load(IO.read(plugin_test_dir + "/db/database.yml"))
+ActiveRecord::Base.establish_connection(ENV["DB"] || "sqlite3mem")
+ActiveRecord::Migration.verbose = false
+load(File.join(plugin_test_dir, "db", "schema.rb"))
+
+Dir["#{plugin_test_dir}/fixtures/*.rb"].each {|file| require file }
+
+
+class Test::Unit::TestCase #:nodoc:
+  self.fixture_path = File.dirname(__FILE__) + "/fixtures/"
+  self.use_transactional_fixtures = true
+  self.use_instantiated_fixtures  = false
+  
+  fixtures :categories, :notes, :departments
+end
\ No newline at end of file