Rails 3.2 Carrierwave precompile error

Question

I got a class AvatarUploader < Carrierwave::Uploader::Base which store User avatars in public/uploads dir:

  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  version :main do
     process :resize_to_limit => [128, 128]
  end

And I want to start application in production mode with assets precompilation enabled. Everything but avatars work fine. When I visit any User profile I get:

Started GET "/users/1" for 127.0.0.1 at 2012-05-03 17:45:24 +0300
Processing by Users::UsersController#show as HTML
  Parameters: {"id"=>"1"}
  Rendered users/users/show.html.erb within layouts/application (2.5ms)
Completed 500 Internal Server Error in 16ms

ActionView::Template::Error ( isn't precompiled):
    87:                     <%= image_tag @user.avatar_url(:main).to_s %>
  app/views/users/users/show.html.erb:87:in `_app_views_users_users_show_html_erb___538221278131396366_28399560'

Maybe there is a way to turn off precompilation for avatars(because they could be re-uploaded when app is running on production). Please provide any suggestions how to fix this issue. Thanks.

Answer 1

When image_tag receives a blank string, it tries to get a resource from the asset pipeline and returns

"isn't precompiled"

https://github.com/rails/rails/issues/3080

Print @user.avatar_url(:main).to_s to double check