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Asked: 2026-06-11T02:09:23+00:00

Ive recently install the ‘ ar-extension ‘ gem. After installation when i run rails

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Ive recently install the ‘ar-extension‘ gem. After installation when i run rails c or rails s i gets the following error : 

/usr/local/rvm/gems/ruby-1.9.2-p320/gems/ar-extensions-0.9.2/lib/ar-extensions/extensions.rb:427:in `<class:SqliteRegexp>': undefined method `class_inheritable_accessor' for ActiveRecord::Extensions::SqliteRegexp:Class (NoMethodError)
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/ar-extensions-0.9.2/lib/ar-extensions/extensions.rb:426:in `<module:Extensions>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/ar-extensions-0.9.2/lib/ar-extensions/extensions.rb:112:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/ar-extensions-0.9.2/init.rb:10:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/ar-extensions-0.9.2/lib/ar-extensions.rb:5:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:68:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:66:in `each'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:66:in `block in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:55:in `each'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler/runtime.rb:55:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320@global/gems/bundler-1.1.4/lib/bundler.rb:119:in `require'
    from /home/infibeam/Aptana_studio_3/workspace/DigitalAssetManagement/config/application.rb:7:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.6/lib/rails/commands.rb:53:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.6/lib/rails/commands.rb:53:in `block in <top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.6/lib/rails/commands.rb:50:in `tap'
    from /usr/local/rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.6/lib/rails/commands.rb:50:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

I’ve google for the error but in vain..Plz help me to know what xactly is going wrong.

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1 Answer

  1. Editorial Team

    The gem you’re trying to use is not compatible with rails 3.2. class_inheritable_accessor has been deprecated in favor of class_attribute.

    You can look for rails 3.2 fork of this gem, do your own port, or search for substitutes.

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