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Home/ Questions/Q 6539123
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T10:49:12+00:00 2026-05-25T10:49:12+00:00

Does anyone have any idea why annotate does not work anymore in rails 3.1

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Does anyone have any idea why annotate does not work anymore in rails 3.1 ?

When trying to run it with :

 $ rvmsudo bundle exec annotate --position before

and given I’ve got the following in my gemfile:

gem "annotate", '2.4.0'

I get the following error:

  /usr/local/rvm/gems/ruby-1.9.2-p180@rails31/gems/activerecord-3.1.0/lib/active_record
/railties/databases.rake:3:in `<top (required)>': undefined method `namespace' for
main:Object (NoMethodError)

I’m using RVM with a gemset dedicated to rails 3.1 with Ruby 1.9.2

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  1. Editorial Team
    Editorial Team
    2026-05-25T10:49:13+00:00Added an answer on May 25, 2026 at 10:49 am

    There’s already a patch for this issue: https://github.com/ctran/annotate_models/commit/8057b920968a4c64c7d558e43834f81867329fcc

    You should use the last version:

    gem 'annotate', :git => 'git://github.com/ctran/annotate_models.git'
    

    Bests,

    UPDATE: It’s fixed in the latest beta version at RubyGems. Use:

     gem 'annotate', '~> 2.4.1.beta' 
    

    Thanks to Michael Hartl for this information.

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