未初始化的常量 Rack::Session::Abstract::Persisted 以启动 Rails 5 服务器 [英] uninitialized constant Rack::Session::Abstract::Persisted to start Rails 5 server
本文介绍了未初始化的常量 Rack::Session::Abstract::Persisted 以启动 Rails 5 服务器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在运行命令 rails s
=> Booting Thin
=> Rails 5.0.0.1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
Exiting
/var/lib/gems/2.2.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/session/abstract_store.rb:90:in `<module:Session>': uninitialized constant Rack::Session::Abstract::Persisted (NameError)
from /var/lib/gems/2.2.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/session/abstract_store.rb:8:in `<module:ActionDispatch>'
from /var/lib/gems/2.2.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/session/abstract_store.rb:7:in `<top (required)>'
from /var/lib/gems/2.2.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/session/cookie_store.rb:2:in `<top (required)>'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/configuration.rb:181:in `const_get'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/configuration.rb:181:in `session_store'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/default_middleware_stack.rb:58:in `block in build_stack'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/default_middleware_stack.rb:13:in `tap'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/default_middleware_stack.rb:13:in `build_stack'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application.rb:504:in `default_middleware_stack'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/engine.rb:506:in `block in app'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/engine.rb:504:in `synchronize'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/engine.rb:504:in `app'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application/finisher.rb:37:in `block in <module:Finisher>'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `instance_exec'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `run'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
from /usr/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from /usr/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
from /usr/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
from /usr/lib/ruby/2.2.0/tsort.rb:345:in `each'
from /usr/lib/ruby/2.2.0/tsort.rb:345:in `call'
from /usr/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from /usr/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from /usr/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:54:in `run_initializers'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/application.rb:352:in `initialize!'
from /root/sites/instagramm/config/environment.rb:5:in `<top (required)>'
from /root/sites/instagramm/config.ru:3:in `require_relative'
from /root/sites/instagramm/config.ru:3:in `block in <main>'
from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `instance_eval'
from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `initialize'
from /root/sites/instagramm/config.ru:in `new'
from /root/sites/instagramm/config.ru:in `<main>'
from /usr/lib/ruby/vendor_ruby/rack/builder.rb:49:in `eval'
from /usr/lib/ruby/vendor_ruby/rack/builder.rb:49:in `new_from_string'
from /usr/lib/ruby/vendor_ruby/rack/builder.rb:40:in `parse_file'
from /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/server.rb:318:in `build_app_and_options_from_config'
from /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/server.rb:218:in `app'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:59:in `app'
from /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/server.rb:353:in `wrapped_app'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:124:in `log_to_stdout'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:77:in `start'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:90:in `block in server'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /var/lib/gems/2.2.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
推荐答案
看起来你在两个地方使用 rack /usr/lib/ruby/vendor_ruby/rack 和 /var/lib/gems/2.2.0/gems/rack-2.0.1.删除vendor_ruby(未确认)可能会有所帮助.购买也许更好的选择是安装 rvm 或 rbenv 来处理您的 ruby/gems 版本.
It looks you're using rack from two places /usr/lib/ruby/vendor_ruby/rack and /var/lib/gems/2.2.0/gems/rack-2.0.1.
Removing that vendor_ruby (not confirmed) could help. Buy maybe a better choice is to install rvm or rbenv to handle your ruby/gems versions.
这篇关于未初始化的常量 Rack::Session::Abstract::Persisted 以启动 Rails 5 服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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