reverse_sql_order(order_query) private

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# File activerecord/lib/active_record/relation/query_methods.rb, line 305
    def reverse_sql_order(order_query)
      order_query = ["#{quoted_table_name}.#{quoted_primary_key} ASC"] if order_query.empty?

      order_query.map do |o|
        case o
        when Arel::Nodes::Ascending, Arel::Nodes::Descending
          o.reverse
        when String, Symbol
          o.to_s.split(',').collect do |s|
            s.gsub!(/\sasc\Z/, ' DESC') || s.gsub!(/\sdesc\Z/, ' ASC') || s.concat(' DESC')
          end
        else
          o
        end
      end.flatten
    end
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