Esoteric error with file_column 0.3.1


I’m trying to setup file_column in one of my projects. I have
downloaded the 0.3.1 tarball release and extracted it into vendor/
plugins. I have then tried to use file_column in my Image model as it
has been described in the README.

The first page I get from the webserver (Webrick in development mode)
is fine. However, hitting reload on the same page (using the Image
model) crashes my application. I get this error:

undefined method assoc' for classMagick::ImageList’

The application trace is as follows:

undef_method' #{RAILS_ROOT}opt/local/lib/ruby/site_ruby/1.8/RMagick.rb:1002 #{RAILS_ROOT}/vendor/rails/activerecord/lib/../../activesupport/lib/ active_support/dependencies.rb:206:inload’
active_support/dependencies.rb:206:in load' #{RAILS_ROOT}/vendor/rails/activerecord/lib/../../activesupport/lib/ active_support/dependencies.rb:38:inrequire_or_load’
active_support/dependencies.rb:21:in depend_on' #{RAILS_ROOT}/vendor/rails/activerecord/lib/../../activesupport/lib/ active_support/dependencies.rb:177:inrequire_dependency’
active_support/dependencies.rb:177:in require_dependency' #{RAILS_ROOT}/app/models/image.rb:1 #{RAILS_ROOT}/app/controllers/admin/image_controller.rb:10:inlist’
#{RAILS_ROOT}/app/controllers/admin/image_controller.rb:5:in `index’

I have a recent install of RMagick (works in another Rails app) and
rails 0.14.2.

It seems to me that the error is related to rails reloading some file
since the error occurs on the second reload.

I’d be grateful about any hints on how to solve this problem.


Manuel H.

Please ignore my other email. My problem was caused by having
“require_dependency ‘RMagick’” in the controller file. Maybe this
could go into a FAQ, though?

I’m sorry for bothering you.


Manuel H.

Hi Manuel, I believe this comes from the fact that with plugins you
don’t need to require anything?

btw, there’s a wiki entry for FileColum now:


2005/11/18, Manuel H. [email protected]: