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-rw-r--r--activerecord/lib/active_record/attribute_methods/write.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb
index bb0ec6a8c3..c7521422bb 100644
--- a/activerecord/lib/active_record/attribute_methods/write.rb
+++ b/activerecord/lib/active_record/attribute_methods/write.rb
@@ -13,7 +13,7 @@ module ActiveRecord
private
def define_method_attribute=(name)
- safe_name = name.unpack("h*".freeze).first
+ safe_name = name.unpack1("h*".freeze)
ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name
sync_with_transaction_state = "sync_with_transaction_state" if name == primary_key