swanandp/acts_as_list — pull request #71 by ramontayag (2013-02-08 09:04:28+00:00)
Title: `#lower_items` and `#higher_items` returns the items lower and higher

I wanted a way to easily get the items below and above the given list item. This gives that functionality

Notes:

- Adds dependency `activerecord 3.0` and above (this can only be used with that version from now on; I saw that it's somewhat in the roadmap anyway)