NoMethodError:after_attachment_saved_callback_chain

在配置railscoders上传照片的部分,遇到问题undefined method `after_attachment_saved_callback_chain' for #<Class:0x6b2f18c>,哪位高手可以讲解下,感激不尽。 回复...

Accessing ActiveRecord and ActiveModel Callback Chains in ...

...http://dev.rubyonrails.org/… · nicksieger/attachment_fu@...

NoMethodError: undefined method `has_attached_file'

Attachment Chains - Short Pitch Attachment Chain Exporter ...

Attachment Chain - K-1 Attachment Chain Manufacturer from ...

Attachment Chains - K1 Attachment Chain Manufacturer from ...

attachment_fu.rb in xbat-devel | source code search engine