save object_changes on create

lib/paper_trail/has_paper_trail.rb

@@ -149,7 +149,17 @@ def source_version
 
       def record_create
         if switched_on?
-          send(self.class.versions_association_name).create merge_metadata(:event => 'create', :whodunnit => PaperTrail.whodunnit)
+          data = {
+            :event     => 'create',
+            :whodunnit => PaperTrail.whodunnit
+          }
+
+          if changed_notably? and version_class.column_names.include?('object_changes')
+            # The double negative (reject, !include?) preserves the hash structure of self.changes.
+            data[:object_changes] = self.changes.reject { |k, _| !notably_changed.include?(k) }.to_yaml
+          end
+
+          send(self.class.versions_association_name).create merge_metadata(data)
         end
       end
 

test/unit/model_test.rb

@@ -143,8 +143,15 @@ class HasPaperTrailModelTest < ActiveSupport::TestCase
         assert @widget.live?
       end
 
-      should 'not have changes' do
-        assert_equal Hash.new, @widget.versions.last.changeset
+      should 'have changes' do
+        changes = {
+          'name'       => [nil, 'Henry'],
+          'created_at' => [nil, @widget.created_at],
+          'updated_at' => [nil, @widget.updated_at],
+          'id'         => [nil, 1]
+        }
+
+        assert_equal changes, @widget.versions.last.changeset
       end
 
       context 'and then updated without any changes' do