古いレール2.1で奇妙なエラーが発生しました

Question

私はこれまで（ish）が動作していましたが、明らかに私のシステム上で何かが変更され、動作しなくなりました。私は、誰かの古いRailsの2.1プロジェクトの破片を拾っています、と私は同じ不可解なエラーが出る何かをする行くとき：

$ rake db:migrate --trace 
(in /Users/ry/Documents/rails/yogatoday) 
** Invoke db:migrate (first_time) 
** Invoke environment (first_time) 
** Execute environment 
rake aborted! 
undefined method `class_attribute' for ActiveRecord::Base:Class 
/opt/local/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/base.rb:1672:in `method_missing_without_paginate' 
/opt/local/lib/ruby/gems/1.8/gems/mislav-will_paginate-2.2.3/lib/will_paginate/finder.rb:164:in `method_missing' 
/opt/local/lib/ruby/gems/1.8/gems/paperclip-2.3.15/lib/paperclip.rb:182:in `included' 
/opt/local/lib/ruby/gems/1.8/gems/paperclip-2.3.15/lib/paperclip/railtie.rb:20:in `include' 
/opt/local/lib/ruby/gems/1.8/gems/paperclip-2.3.15/lib/paperclip/railtie.rb:20:in `send' 
/opt/local/lib/ruby/gems/1.8/gems/paperclip-2.3.15/lib/paperclip/railtie.rb:20:in `insert' 
/opt/local/lib/ruby/gems/1.8/gems/paperclip-2.3.15/rails/init.rb:2:in `evaluate_init_rb' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin.rb:95:in `evaluate_init_rb' 
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.2/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin.rb:91:in `evaluate_init_rb' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin.rb:44:in `load' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin/loader.rb:33:in `load_plugins' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin/loader.rb:32:in `each' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/rails/plugin/loader.rb:32:in `load_plugins' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/initializer.rb:292:in `load_plugins' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/initializer.rb:142:in `process' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/initializer.rb:97:in `send' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/initializer.rb:97:in `run' 
/Users/ry/Documents/rails/yogatoday/config/environment.rb:13 
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
/opt/local/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:510:in `require' 
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:355:in `new_constants_in' 
/opt/local/lib/ruby/gems/1.8/gems/activesupport-2.1.2/lib/active_support/dependencies.rb:510:in `require' 
/opt/local/lib/ruby/gems/1.8/gems/rails-2.1.2/lib/tasks/misc.rake:3 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain' 
/opt/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' 
/opt/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' 
/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 
/opt/local/bin/rake:19:in `load' 
/opt/local/bin/rake:19 

私はその後、私の設定/ environment.rbにファイルを見れば、私が持っています：Rails::Initializer.run do |config|行である13行目では

Rails::Initializer.run do |config| 
    config.gem 'aasm', :version => '2.1.5' 
    config.gem 'brightcove-api', :version => '1.0.2' 
    config.gem 'fakeweb', :version => '1.2.8' 
    config.gem 'httparty', :version => '0.5.2' 
    config.gem 'calendar_date_select', :version => '1.15' 
    config.gem 'exceptional' 
    config.gem 'fastercsv', :version => '1.4' 
    config.gem 'hominid', :version => '2.1.5' 
    config.gem 'lockfile', :version => '1.4.3' 
    config.gem 'mislav-will_paginate', :lib => 'will_paginate', :version => '~> 2.2.3', :source => 'http://gems.github.com' 
    config.gem 'paperclip' 
    config.gem 'hashie' 
    config.gem 'rest-client', :lib => 'rest_client', :version => '0.8.2' 

... 

end 

。

私はもっとレール3の男ですから、ここで何が起こっているのか正確にはわかりませんが、バージョン間の競合のようなものです。どのようにこれを実行するための任意の提案？

ありがとうございます！

Answer 1

同じエラーが発生しました。 これはpaperclipとwill_paginateの間の競合だと思います。

私はそれを試してみましたが、それは問題を修正クリップバージョン2.3.0

を使用してみてください。

Answer 2

ペーパークリップの新しいバージョンでこのエラーが発生します。これはこのissueで説明されています。ちょうど最近このエラーを修正するためにpull requestが追加されました。

ローカル宝石にパッチを適用するか、以前のバージョンのペーパークリップにロールバックするかの2つの選択肢があります。

config/environment.rbで明示的なバージョンを宣言する必要があります。