collectiveidea/awesome_nested_set — pull request #95 by bluegod (2011-10-20 14:07:48+00:00)
Title: Set child order by column helper

Added helper sorted_nested_set_options which generates options for
select sorted at children level. Example:
(column: "name")
-A
--C
--B

Should now appear if sorted by the "name" column:
-A
--B
--C

Added a similar behaviour to sorted_each_with_level