thoughtbot/paperclip — pull request #787 by jerefrer (2012-03-21 14:56:37+00:00)
Title: Add support for created_at field

Needed to know when a user first added his avatar in my app. Unfortunately this is not handled by Paperclip so I very simply added support for created_at field by looking if the instance responds_to :created_at.

This is for me the simplest way to track changes on an attachment like I'm already doing with other attributes through the *_was* suffix. It was this or I had to create a new table to track every changes I do on my models.

Also it may partially answer this issue : https://github.com/thoughtbot/paperclip/issues/51

What do you think ?