Paperclip gem not recognized

Question

我最近更新到了Rails 3.0.8.rc2，然后更新了回形针gem到2.3.11（这在2.3.10上也失败了）。在启动时，回形针宝石似乎没有注册：

/Users/jade/code/plantworking/app/models/comment.rb:17: undefined method `has_attached_file' for Comment:Class (NoMethodError) 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:454:in `load' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:454:in `load_file' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:596:in `new_constants_in' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:453:in `load_file' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:340:in `require_or_load' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:300:in `depend_on' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:216:in `require_dependency' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/rails/mongoid.rb:55:in `load_model' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/rails/mongoid.rb:18:in `load_models' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/rails/mongoid.rb:17:in `each' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/rails/mongoid.rb:17:in `load_models' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/paths.rb:102:in `each' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/paths.rb:102:in `each' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/rails/mongoid.rb:16:in `load_models' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/mongoid-2.0.2/lib/mongoid/railtie.rb:86:in `_callback_before_5' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/callbacks.rb:420:in `_run_prepare_callbacks' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/callbacks.rb:40:in `initialize' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:33:in `new' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:33:in `build' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:79:in `build' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application.rb:209:in `inject' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:79:in `each' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:79:in `inject' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/actionpack-3.0.8.rc2/lib/action_dispatch/middleware/stack.rb:79:in `build' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application.rb:162:in `build_middleware_stack' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application/finisher.rb:35 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/initializable.rb:25:in `instance_exec' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/initializable.rb:25:in `run' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/initializable.rb:50:in `run_initializers' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/initializable.rb:49:in `each' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/initializable.rb:49:in `run_initializers' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application.rb:134:in `initialize!' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application.rb:77:in `send' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/railties-3.0.8.rc2/lib/rails/application.rb:77:in `method_missing' 
from /Users/jade/code/plantworking/config/environment.rb:11 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/polyglot-0.3.1/lib/polyglot.rb:64:in `polyglot_original_require' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/polyglot-0.3.1/lib/polyglot.rb:64:in `require' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:239:in `require' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:225:in `load_dependency' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:596:in `new_constants_in' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:225:in `load_dependency' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/activesupport-3.0.8.rc2/lib/active_support/dependencies.rb:239:in `require' 
from /Users/jade/code/plantworking/config.ru:3 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/rack-1.2.3/lib/rack/builder.rb:46:in `instance_eval' 
from /Users/jade/.rvm/gems/ree-1.8.7-2010.02@plantworking/gems/rack-1.2.3/lib/rack/builder.rb:46:in `initialize' 
from /Users/jade/code/plantworking/config.ru:1:in `new' 
from /Users/jade/code/plantworking/config.ru:1 

我使用的是Mongoid 2.0.2。

任何人都可以使用Rails 3.0.8+的回形针吗？

Answer 1

PaperClip默认只在ActiveRecord上有效。您可能想要尝试mongoid version of PaperClip或切换到Carrierwave。