1 files changed, 5 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index da9b125fd6..1713ab7ed3 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -180,7 +180,11 @@ module ActiveRecord
         def through_records_for(record)
           attributes = construct_join_attributes(record)
           candidates = Array.wrap(through_association.target)
-          candidates.find_all { |c| c.attributes.slice(*attributes.keys) == attributes }
+          candidates.find_all do |c|
+            attributes.all? do |key, value|
+              c.public_send(key) == value
+            end
+          end
         end
 
         def delete_through_records(records)