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Works "automagically" like updated_at...just add a column named <column>_updated_at, and when your column changes, the timestamp will be updated.

installgem install column_timestamps -v 0.1.0
Authors

Myron Marston

3,751 total downloads 1,835 for this version
Owners

42d4590355a1404230fbc9aff4dd377b

Gemfile
gem 'column_timestamps', '~> 0.1.0'
Versions
  1. 0.1.1 March 25, 2010 (8 KB)
  2. 0.1.0 October 19, 2009 (7 KB)
Runtime Dependencies
  1. activerecord >= 0