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-rw-r--r--activerecord/lib/active_record/autosave_association.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb
index 7517896235..6af384367f 100644
--- a/activerecord/lib/active_record/autosave_association.rb
+++ b/activerecord/lib/active_record/autosave_association.rb
@@ -372,7 +372,9 @@ module ActiveRecord
if autosave && association.marked_for_destruction?
association.destroy
elsif autosave != false
- saved = association.save(:validate => !autosave) if association.new_record? || autosave
+ if association.new_record? || ( autosave && association.changed? )
+ saved = association.save(:validate => !autosave)
+ end
if association.updated?
association_id = association.send(reflection.options[:primary_key] || :id)