> The error occurred while evaluating nil.include? Is this happening in development mode? If so, it is probably my favorite* ActiveRecord bug: https://rails.lighthouseapp.com/projects/8994/tickets/1339-arbase-should-not-be-nuking-its-children-just-because-it-lost-interest
The workaround is to edit config/environment.rb and change: config.time_zone = 'UTC' to: config.active_record.default_time_zone :utc Let me know if that doesn't fix it for you. *Least favorite.