From ea0975a20b0752bfbfcafe8eefd98f7fe9bcd386 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Tue, 11 Sep 2007 03:25:59 +0000
Subject: Moved acts_as_tree into a plugin of the same name on the official
 Rails svn (closes #9514) [lifofifo]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7454 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 activerecord/lib/active_record.rb           |  2 -
 activerecord/lib/active_record/acts/tree.rb | 96 -----------------------------
 2 files changed, 98 deletions(-)

(limited to 'activerecord/lib')

diff --git a/activerecord/lib/active_record.rb b/activerecord/lib/active_record.rb
index c71afd5170..8d032d7192 100755
--- a/activerecord/lib/active_record.rb
+++ b/activerecord/lib/active_record.rb
@@ -43,7 +43,6 @@ require 'active_record/associations'
 require 'active_record/aggregations'
 require 'active_record/transactions'
 require 'active_record/timestamp'
-require 'active_record/acts/tree'
 require 'active_record/locking/optimistic'
 require 'active_record/locking/pessimistic'
 require 'active_record/migration'
@@ -63,7 +62,6 @@ ActiveRecord::Base.class_eval do
   include ActiveRecord::Aggregations
   include ActiveRecord::Transactions
   include ActiveRecord::Reflection
-  include ActiveRecord::Acts::Tree
   include ActiveRecord::Calculations
   include ActiveRecord::XmlSerialization
   include ActiveRecord::AttributeMethods
diff --git a/activerecord/lib/active_record/acts/tree.rb b/activerecord/lib/active_record/acts/tree.rb
index 5e2e50552d..e69de29bb2 100644
--- a/activerecord/lib/active_record/acts/tree.rb
+++ b/activerecord/lib/active_record/acts/tree.rb
@@ -1,96 +0,0 @@
-module ActiveRecord
-  module Acts #:nodoc:
-    module Tree #:nodoc:
-      def self.included(base)
-        base.extend(ClassMethods)
-      end
-
-      # 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
-      #
-      # In addition to the parent and children associations, the following instance methods are added to the class
-      # after calling <tt>acts_as_tree</tt>:
-      # * <tt>siblings</tt> - Returns all the children of the parent, excluding the current node (<tt>[subchild2]</tt> when called on <tt>subchild1</tt>)
-      # * <tt>self_and_siblings</tt> - Returns all the children of the parent, including the current node (<tt>[subchild1, subchild2]</tt> when called on <tt>subchild1</tt>)
-      # * <tt>ancestors</tt> - Returns all the ancestors of the current node (<tt>[child1, root]</tt> when called on <tt>subchild2</tt>)
-      # * <tt>root</tt> - Returns the root of the current node (<tt>root</tt> when called on <tt>subchild2</tt>)
-      module ClassMethods
-        # Configuration options are:
-        #
-        # * <tt>foreign_key</tt> - specifies the column name to use for tracking of the tree (default: +parent_id+)
-        # * <tt>order</tt> - makes it possible to sort the children according to this SQL snippet.
-        # * <tt>counter_cache</tt> - keeps a count in a +children_count+ column if set to +true+ (default: +false+).
-        def acts_as_tree(options = {})
-          configuration = { :foreign_key => "parent_id", :order => nil, :counter_cache => nil }
-          configuration.update(options) if options.is_a?(Hash)
-
-          belongs_to :parent, :class_name => name, :foreign_key => configuration[:foreign_key], :counter_cache => configuration[:counter_cache]
-          has_many :children, :class_name => name, :foreign_key => configuration[:foreign_key], :order => configuration[:order], :dependent => :destroy
-
-          class_eval <<-EOV
-            include ActiveRecord::Acts::Tree::InstanceMethods
-
-            def self.roots
-              find(:all, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
-            end
-
-            def self.root
-              find(:first, :conditions => "#{configuration[:foreign_key]} IS NULL", :order => #{configuration[:order].nil? ? "nil" : %Q{"#{configuration[:order]}"}})
-            end
-          EOV
-        end
-      end
-
-      module InstanceMethods
-        # Returns list of ancestors, starting from parent until root.
-        #
-        #   subchild1.ancestors # => [child1, root]
-        def ancestors
-          node, nodes = self, []
-          nodes << node = node.parent while node.parent
-          nodes
-        end
-
-        # Returns the root node of the tree.
-        def root
-          node = self
-          node = node.parent while node.parent
-          node
-        end
-
-        # Returns all siblings of the current node.
-        #
-        #   subchild1.siblings # => [subchild2]
-        def siblings
-          self_and_siblings - [self]
-        end
-
-        # Returns all siblings and a reference to the current node.
-        #
-        #   subchild1.self_and_siblings # => [subchild1, subchild2]
-        def self_and_siblings
-          parent ? parent.children : self.class.roots
-        end
-      end
-    end
-  end
-end
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