Finished fixing specs after Rails 3 refactoring.

CHANGELOG

@@ -1,3 +1,5 @@
 2.0.0.pre
 * Expect Rails 3
+* Changed how callbacks work. Returning false in a before_move action does not block save operations. Use a validation or exception in the callback if you need that.
 * Switched to RSpec
+* Remove use of Comparable

lib/awesome_nested_set/awesome_nested_set.rb

@@ -51,7 +51,6 @@ def acts_as_nested_set(options = {})
         class_inheritable_reader :acts_as_nested_set_options
 
         include CollectiveIdea::Acts::NestedSet::Model
-        include Comparable
         include Columns
         extend Columns
 
@@ -240,11 +239,6 @@ def child?
             !parent_id.nil?
           end
 
-          # order by left column
-          def <=>(x)
-            left <=> x.left
-          end
-
           # Returns root
           def root
             self_and_ancestors.first
@@ -321,7 +315,7 @@ def same_scope?(other)
           # Find the first sibling to the left
           def left_sibling
             siblings.where(["#{self.class.quoted_table_name}.#{quoted_left_column_name} < ?", left]).
-                    order("#{self.class.quoted_table_name}.#{quoted_left_column_name} DESC").first
+                    order("#{self.class.quoted_table_name}.#{quoted_left_column_name} DESC").last
           end
 
           # Find the first sibling to the right

spec/awesome_nested_set_spec.rb

@@ -768,10 +768,10 @@ def check_structure(entries, structure)
       assert !categories(:child_3).root?
     end
 
-    it "before_move_callback_returning_false_halts_save" do
+    it "should not halt save actions" do
       Category.test_allows_move = false
       categories(:child_3).parent_id = nil
-      categories(:child_3).save.should_not be_true
+      categories(:child_3).save.should be_true
     end
   end
 end