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-rw-r--r--activerecord/lib/active_record/relation.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index 6bbec7c0c0..85648a7f8f 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -205,7 +205,9 @@ module ActiveRecord
# constraint an exception may be raised, just retry:
#
# begin
- # CreditAccount.find_or_create_by(user_id: user.id)
+ # CreditAccount.transaction(requires_new: true) do
+ # CreditAccount.find_or_create_by(user_id: user.id)
+ # end
# rescue ActiveRecord::RecordNotUnique
# retry
# end