# File lib/scoped_search/query_builder.rb, line 494
494:       def order_by(order, &block)
495:         sql = super(order, &block)
496:         sql += sql.include?('DESC') ? ' NULLS LAST ' : ' NULLS FIRST ' if sql
497:         sql
498:       end

     # File lib/scoped_search/query_builder.rb, line 479
479:       def sql_operator(operator, field)
480:         raise ScopedSearch::QueryNotSupported, "the operator '#{operator}' is not supported for field type '#{field.type}'" if [:like, :unlike].include?(operator) and !field.textual?
481:         return '@@' if [:like, :unlike].include?(operator) and field.full_text_search
482:         case operator
483:           when :like   then 'ILIKE'
484:           when :unlike then 'NOT ILIKE'
485:           else super(operator, field)
486:         end
487:       end

     # File lib/scoped_search/query_builder.rb, line 466
466:       def sql_test(field, operator, value, lhs, &block)
467:         if [:like, :unlike].include?(operator) and field.full_text_search
468:           yield(:parameter, value)
469:           negation = (operator == :unlike) ? "NOT " : ""
470:           locale = (field.full_text_search == true) ? 'english' : field.full_text_search
471:           return "#{negation}to_tsvector('#{locale}', #{field.to_sql(operator, &block)}) #{self.sql_operator(operator, field)} to_tsquery('#{locale}', ?)"
472:         else
473:           super
474:         end
475:       end

     # File lib/scoped_search/query_builder.rb, line 490
490:       def to_not_sql(rhs, definition, &block)
491:         "NOT COALESCE(#{rhs.to_sql(self, definition, &block)}, false)"
492:       end