Rails ブログ アプリに宣言型承認を構成しようとしています。必要なすべてのことを行った後、rails s を実行してサーバーを起動しました。次のエラーで立ち往生しています。
rails s
/var/lib/gems/1.8/gems/activerecord-3.2.9/lib/active_record/dynamic_matchers.rb:50:in `method_missing': undefined local variable or method `scopes' for ActiveRecord::Base:Class (NameError)
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization/in_model.rb:37:in `included'
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization/in_model.rb:36:in `module_eval'
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization/in_model.rb:36:in `included'
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization.rb:17:in `include'
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization.rb:17:in `send'
from /var/lib/gems/1.8/gems/declarative_authorization-0.5.2/lib/declarative_authorization.rb:17
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `require'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `require'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `each'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `require'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `each'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `require'
from /var/lib/gems/1.8/gems/bundler-1.2.3/lib/bundler.rb:128:in `require'
from /blogging/config/application.rb:7
from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:53:in `require'
from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:53
from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:50:in `tap'
from /var/lib/gems/1.8/gems/railties-3.2.9/lib/rails/commands.rb:50
from script/rails:6:in `require'
from script/rails:6
私のブログ アプリは、このブログアプリに多少似ています。
この問題の解決にご協力ください。ありがとう。:)-