gistfile1.txt

     def build_table_aliases(from)
        # for the targets
        {}.tap do |aliases|
          from.map(&:to_s).sort.map(&:to_sym).each_with_index do |plural, t_index|
            begin
              table = plural._as_class.table_name
            rescue NameError => e
              raise PolymorphicError, "Could not find a valid class for #{plural.inspect} (tried #{plural.to_s._classify}). If it's namespaced, be sure to specify it as :\"module/#{plural}\" instead."
            end
            begin
              plural._as_class.columns.map(&:name).each_with_index do |field, f_index|
                aliases["#{table}.#{field}"] = "t#{t_index}_r#{f_index}"
              end
            rescue ActiveRecord::StatementInvalid => e
              _logger_warn "Looks like your table doesn't exist for #{plural.to_s._classify}.\nError #{e}\nSkipping..."
            end
          end
        end
      end