within_new_transaction

# File activerecord/lib/active_record/connection_adapters/abstract/transaction.rb, line 622
      def within_new_transaction(isolation: nil, joinable: true)
        @connection.lock.synchronize do
          transaction = begin_transaction(isolation: isolation, joinable: joinable)
          begin
            yield transaction.user_transaction
          rescue Exception => error
            rollback_transaction
            after_failure_actions(transaction, error)

            raise
          ensure
            unless error
              if Thread.current.status == "aborting"
                rollback_transaction
              else
                begin
                  commit_transaction
                rescue ActiveRecord::ConnectionFailed
                  transaction.invalidate! unless transaction.state.completed?
                  raise
                rescue Exception
                  rollback_transaction(transaction) unless transaction.state.completed?
                  raise
                end
              end
            end
          end
        ensure
          unless transaction&.state&.completed?
            @connection.throw_away!
            transaction&.incomplete!
          end
        end
      end