Add ability to get all siblings, including the current child, with acts_as_tree. Recloses #2140.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2507 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* Add ability to get all siblings, including the current child, with acts_as_tree. Recloses #2140. [Michael Schuerig <michael@schuerig.de>]
+
 * Add geometric type for postgresql adapter. #2233 [akaspick@gmail.com]
 
 * Add option (true by default) to generate reader methods for each attribute of a record to avoid the overhead of calling method missing. In partial fullfilment of #1236. [skaes@web.de]

activerecord/lib/active_record/acts/tree.rb

@@ -71,8 +71,13 @@ def self.root
           end
 
           define_method(:siblings) do
-            ( has_parent? ? parent.children : self.class.roots ) - [self]
+            self_and_siblings - [self]
           end
+
+          define_method(:self_and_siblings) do
+            has_parent? ? parent.children : self.class.roots
+          end
+
         end
       end
     end

activerecord/test/mixin_test.rb

@@ -280,6 +280,15 @@ def test_siblings
     assert_equal [mixins(:tree_1), mixins(:tree3_1)], mixins(:tree2_1).siblings
     assert_equal [mixins(:tree_1), mixins(:tree2_1)], mixins(:tree3_1).siblings
   end
+
+  def test_self_and_siblings
+    assert_equal [mixins(:tree_1), mixins(:tree2_1), mixins(:tree3_1)], mixins(:tree_1).self_and_siblings
+    assert_equal [mixins(:tree_2), mixins(:tree_4)], mixins(:tree_2).self_and_siblings
+    assert_equal [mixins(:tree_3)], mixins(:tree_3).self_and_siblings
+    assert_equal [mixins(:tree_2), mixins(:tree_4)], mixins(:tree_4).self_and_siblings
+    assert_equal [mixins(:tree_1), mixins(:tree2_1), mixins(:tree3_1)], mixins(:tree2_1).self_and_siblings
+    assert_equal [mixins(:tree_1), mixins(:tree2_1), mixins(:tree3_1)], mixins(:tree3_1).self_and_siblings
+  end
 end
 
 class TouchTest < Test::Unit::TestCase