クリップ問題追加した後のPaperclip.options [：command_path] = "は/ usr/local/binに/" あなたが質問をしていないが、私はあなたが未定義であること 'class_attribute' といくつかの問題があると仮定し

Question

=> Booting Mongrel 
=> Rails 2.3.5 application starting on http://0.0.0.0:3000 
/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. Use #requirement 
/usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:1959:in `method_missing': undefined method `class_attribute' for ActiveRecord::Base:Class (NoMethodError) 
    from /usr/lib/ruby/gems/1.8/gems/paperclip-2.3.14/lib/paperclip.rb:182:in `included' 
    from /home/prabhu/Desktop/test/vendor/plugins/thoughtbot-paperclip-13d51e3/lib/paperclip/railtie.rb:20:in `include' 
    from /home/prabhu/Desktop/test/vendor/plugins/thoughtbot-paperclip-13d51e3/lib/paperclip/railtie.rb:20:in `send' 
    from /home/prabhu/Desktop/test/vendor/plugins/thoughtbot-paperclip-13d51e3/lib/paperclip/railtie.rb:20:in `insert' 
    from /usr/lib/ruby/gems/1.8/gems/paperclip-2.3.14/rails/init.rb:2:in `evaluate_init_rb' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:158:in `evaluate_init_rb' 
    from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:154:in `evaluate_init_rb' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin.rb:48:in `load' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:38:in `load_plugins' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:in `each' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/plugin/loader.rb:37:in `load_plugins' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:369:in `load_plugins' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:165:in `process' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `send' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in `run' 
    from /home/prabhu/Desktop/test/config/environment.rb:9 
    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
    from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' 
    from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' 
    from /usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:84 
    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
    from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
    from script/server:3 

Answer 1

。

私は確かではありません（;-)を確認するには怠惰ですが、 'class_attribute'がRails 3に追加されている可能性があります。あなたはRails 2とpaperclip gemを持っています。

あなたはこの宝石の古いバージョンを使用しようとするかもしれない - ちょうどRailsの2

UPDATEと互換性のある1つのチェック：あなたはコメントで読むことができたよう

、ダビデはあなたのバージョンを見つけましたこのメソッドが定義されているRails。したがって、レールを少なくとも2.3.9にアップグレードするか、クリップをダウングレードするかの2つの選択肢があります。