# File lib/active_record/connection_adapters/abstract/schema_statements.rb, line 524 def add_index_sort_order(option_strings, column_names, options = {}) if options.is_a?(Hash) && order = options[:order] case order when Hash column_names.each {|name| option_strings[name] += " #{order[name].to_s.upcase}" if order.has_key?(name)} when String column_names.each {|name| option_strings[name] += " #{order.upcase}"} end end return option_strings end