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Editorial Team
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Asked: 2026-05-15T03:10:43+00:00

Paperclip produces this error, after checking out the plugin’s rails3 branch. My Gemfile has

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Paperclip produces this error, after checking out the plugin’s rails3 branch.
My Gemfile has following line: 

gem 'paperclip', :git => 'http://github.com/thoughtbot/paperclip.git', :branch => 'rails3'

And the error message is: 

NoMethodError: undefined method `has_attached_file' for #<Class:0x2a50530>
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1 Answer

  1. Editorial Team

    Update 06-21-10: the thoughtbot version has been fixed.

    I had to add Paperclip::Railtie.insert to my application.rb at the end of class Application < Rails::Application to get it to work correctly. I have deleted my fork since the official repo is working. Hope that helps someone.

    You will also need to add the following to your Gemfile

    gem "paperclip", :git => "http://github.com/thoughtbot/paperclip.git"
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