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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
Authors

Myron Marston

2,523 total downloads 1,266 for this version
Owners

42d4590355a1404230fbc9aff4dd377b

Gemfile
gem "column_timestamps", "~> 0.1.1"
Versions
  1. 0.1.1 March 25, 2010
  2. 0.1.0 October 19, 2009
Runtime Dependencies
  1. activerecord >= 2.1.0