Rails: NameError: uninitialized constant Article::ImageUploader when using Carrierwave on rails 4.1.5

I know this is a few months late but I stumbled across this issue myself. My solution was to paste

require ‘carrierwave/orm/activerecord’

into the config/environment.rb file. Just append it at the end.

My Env:
Ruby 2.1.2p95 ;
Rails 4.1.7 ;
Carrierwave-0.10.0