rails/rails — pull request #5113 by bsodmike (2012-02-21 12:43:55+00:00)
Title: Added clarification stating the counter_cache attribute needs to be created on the associate class via a migration

Hi all,

I only updated the comment for `:counter_cache`. Hopefully this should provide an elucidation to newcomers (to Rails and the `:counter_cache` option itself)

Thanks, M.