在我尝试从4.1.8升级到rails 4.2.0.rc1时,运行服务器时出现以下错误:
joshRpowell@Joshuas-MacBook-Air:~/MyProjects/rentlit-app[hook]$ rails s
/Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/inherited_resources-1.5.1/lib/inherited_resources/responder.rb:2:in `<module:InheritedResources>': uninitialized constant ActionController::Responder (NameError)
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/inherited_resources-1.5.1/lib/inherited_resources/responder.rb:1:in `<top (required)>'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/inherited_resources-1.5.1/lib/inherited_resources.rb:4:in `<top (required)>'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/bundler/gems/active_admin-951f35d6799a/lib/active_admin.rb:10:in `<top (required)>'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/bundler/gems/active_admin-951f35d6799a/lib/activeadmin.rb:1:in `require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/bundler/gems/active_admin-951f35d6799a/lib/activeadmin.rb:1:in `<top (required)>'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:76:in `require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:72:in `each'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:72:in `block in require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:61:in `each'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler/runtime.rb:61:in `require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.7/lib/bundler.rb:133:in `require'
from /Users/joshRpowell/MyProjects/rentlit-app/config/application.rb:7:in `<top (required)>'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands/commands_tasks.rb:78:in `require'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands/commands_tasks.rb:78:in `block in server'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands/commands_tasks.rb:75:in `server'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/joshRpowell/.rvm/gems/ruby-2.1.5@rails4.2/gems/railties-4.2.0.rc1/lib/rails/commands.rb:17:in …