4 files changed, 17 insertions, 3 deletions
diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb
index 9b8f843432..be0f24ff92 100644
--- a/activemodel/lib/active_model.rb
+++ b/activemodel/lib/active_model.rb
@@ -24,7 +24,7 @@
 activesupport_path = File.expand_path('../../../activesupport/lib', __FILE__)
 $:.unshift(activesupport_path) if File.directory?(activesupport_path) && !$:.include?(activesupport_path)
 require 'active_support'
-
+require 'active_model/version'
 
 module ActiveModel
   extend ActiveSupport::Autoload
@@ -45,7 +45,6 @@ module ActiveModel
   autoload :Serialization
   autoload :TestCase
   autoload :Translation
-  autoload :VERSION
   autoload :Validations
   autoload :Validator
 
diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb
index 2d580fd325..adb71f788f 100644
--- a/activemodel/lib/active_model/naming.rb
+++ b/activemodel/lib/active_model/naming.rb
@@ -129,7 +129,11 @@ module ActiveModel
 
     private
       def self.model_name_from_record_or_class(record_or_class)
-        (record_or_class.is_a?(Class) ? record_or_class : record_or_class.class).model_name
+        (record_or_class.is_a?(Class) ? record_or_class : convert_to_model(record_or_class).class).model_name
+      end
+
+      def self.convert_to_model(object)
+        object.respond_to?(:to_model) ? object.to_model : object
       end
   end
 
diff --git a/activemodel/test/cases/naming_test.rb b/activemodel/test/cases/naming_test.rb
index 40ce4c0e2d..a7dde2c433 100644
--- a/activemodel/test/cases/naming_test.rb
+++ b/activemodel/test/cases/naming_test.rb
@@ -125,6 +125,10 @@ class NamingHelpersTest < Test::Unit::TestCase
     @param_key = 'contact'
   end
 
+  def test_to_model_called_on_record
+    assert_equal 'post_named_track_backs', plural(Post::TrackBack.new)
+  end
+
   def test_singular
     assert_equal @singular, singular(@record)
   end
diff --git a/activemodel/test/models/track_back.rb b/activemodel/test/models/track_back.rb
index d137e4ff8f..768c96ecf0 100644
--- a/activemodel/test/models/track_back.rb
+++ b/activemodel/test/models/track_back.rb
@@ -1,4 +1,11 @@
 class Post
   class TrackBack
+    def to_model
+      NamedTrackBack.new
+    end
+  end
+
+  class NamedTrackBack
+    extend ActiveModel::Naming
   end
 end
 \ No newline at end of file