method
reverse_sql_order
v5.2.3 -
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Class: ActiveRecord::QueryMethods
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reverse_sql_order(order_query)
private
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# File activerecord/lib/active_record/relation/query_methods.rb, line 1083 def reverse_sql_order(order_query) if order_query.empty? return [arel_attribute(primary_key).desc] if primary_key raise IrreversibleOrderError, "Relation has no current order and table has no primary key to be used as default order" end order_query.flat_map do |o| case o when Arel::Attribute o.desc when Arel::Nodes::Ordering o.reverse when String if does_not_support_reverse?(o) raise IrreversibleOrderError, "Order #{o.inspect} can not be reversed automatically" end o.split(",").map! do |s| s.strip! s.gsub!(/\sasc\Z/, " DESC") || s.gsub!(/\sdesc\Z/, " ASC") || (s << " DESC") end else o end end end