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当我运行Rails生成RSpec的:在轨道上4.2的Ruby 2.1.5安装我得到:Rails的rspec的产生:安装在轨道上4.2失败关于Ruby 2.1.5
/home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/inherited_resources-1.4.1/lib/inherited_resources/responder.rb:2:in `<module:InheritedResources>': uninitialized constant ActionController::Responder (NameError)
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/inherited_resources-1.4.1/lib/inherited_resources/responder.rb:1:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/inherited_resources-1.4.1/lib/inherited_resources.rb:4:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/bundler/gems/active_admin-7aef260921d4/lib/active_admin.rb:10:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/bundler/gems/active_admin-7aef260921d4/lib/activeadmin.rb:1:in `require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/bundler/gems/active_admin-7aef260921d4/lib/activeadmin.rb:1:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:76:in `require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:72:in `each'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:72:in `block in require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:61:in `each'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler/runtime.rb:61:in `require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/bundler-1.7.11/lib/bundler.rb:134:in `require'
from /home/xxx/biznz/api/config/application.rb:15:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:82:in `require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:82:in `preload'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:143:in `serve'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:131:in `block in run'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:125:in `loop'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application.rb:125:in `run'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/gems/2.1.0/gems/spring-1.2.0/lib/spring/application/boot.rb:18:in `<top (required)>'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /home/xxx/.rbenv/versions/2.1.5/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
我想按照这个轨道/烬宝教程,我不知道我做错了什么?! https://devmynd.com/blog/2014-7-rails-ember-js-with-the-ember-cli-redux-part-1-the-api-and-cms-with-ruby-on-rails