undefined method "has_attached_file" with paperclip

Question

I'm getting some unexpected behavior from my app while Upgrading to from Rails 2.3.11 to 3.1, particularly in relation to Paperclip.

I've added the gem 'paperclip' to my Gemfile, and I ran bundle install and all seems to go well, except that when I start my server, I get this stack trace

...: `method_missing': undefined local variable or method `has_attached_file' for #<Class:0x7f30b32c1f88> (NameError)
...
...
from /home/user/railscamp/app/app/models/organization.rb:76
...
from /home/user/railscamp/app/config.ru:1:in `new'
from /home/user/railscamp/app/config.ru:1

Any thoughts?

Answer 1

Add these to your model

attr_accessor :image_file_name, :image_content_type, :image_file_size, :image_updated_at