Ruby on rails Rails命令赢得'；无法工作，正在构建web应用程序

每次在终端中运行

rails s

时，都会出现以下文本

yonas@yonas:~/Documents/code/MCtut/commandsapp$ rails s
=> Booting WEBrick
=> Rails 4.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/home/yonas/Documents/code/MCtut/commandsapp/config/initializers/devise.rb:3:in `<top (required)>': uninitialized constant Devise (NameError)
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:652:in `block in load_config_initializer'
  from /usr/local/lib/ruby/gems/2.1.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:166:in `instrument'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:651:in `load_config_initializer'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in `each'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in `block in <class:Engine>'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:418:in `block (2 levels) in each_strongly_connected_component_from'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:417:in `block in each_strongly_connected_component_from'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `each'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `tsort_each_child'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:411:in `call'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:411:in `each_strongly_connected_component_from'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `each'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `call'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each'
  from /usr/local/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:54:in `run_initializers'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/application.rb:352:in `initialize!'
  from /home/yonas/Documents/code/MCtut/commandsapp/config/environment.rb:5:in `<top (required)>'
  from /home/yonas/Documents/code/MCtut/commandsapp/config.ru:3:in `require'
  from /home/yonas/Documents/code/MCtut/commandsapp/config.ru:3:in `block in <main>'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `instance_eval'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in `initialize'
  from /home/yonas/Documents/code/MCtut/commandsapp/config.ru:in `new'
  from /home/yonas/Documents/code/MCtut/commandsapp/config.ru:in `<main>'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in `eval'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in `new_from_string'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:40:in `parse_file'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:299:in `build_app_and_options_from_config'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:208:in `app'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in `app'
  from /usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:336:in `wrapped_app'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in `log_to_stdout'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in `start'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
  from /usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
  from bin/rails:4:in `require'
  from bin/rails:4:in `<main>'

yonas@yonas：~/Documents/code/MCtut/commandsapp$rails
=>启动WEBrick
=>Rails 4.2.0应用程序在上开始开发http://localhost:3000
=>运行“rails服务器-h”以获得更多启动选项
=>Ctrl-C关闭服务器
退出
/home/yonas/Documents/code/MCtut/commandsapp/config/initializers/designe.rb:3:in`'：未初始化的常量designe（NameError）
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:652:in'block in load_config_initializer'
from/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-4.2.0/lib/active\u support/notifications.rb:166:in“instrument”
来自/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:651:in'load_configinitializer'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:616:in'block（2层）in'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in'each'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in'block-in'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in'instance_exec'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in'run'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:55:“运行中的块初始化器”
from/usr/local/lib/ruby/2.1.0/tsort.rb:226:in'block in tsort_each'
from/usr/local/lib/ruby/2.1.0/tsort.rb:348:in“每个强连接的组件中的块（2个级别）”
from/usr/local/lib/ruby/2.1.0/tsort.rb:418:in`block（2层）中的每个\u强连接的\u组件\u from'
from/usr/local/lib/ruby/2.1.0/tsort.rb:427:in“每个强连接的组件”
from/usr/local/lib/ruby/2.1.0/tsort.rb:417:in`block in each_强连接的_组件_from'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:44:in'each'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:44:in'tsort_each_child'
from/usr/local/lib/ruby/2.1.0/tsort.rb:411:in'call'
from/usr/local/lib/ruby/2.1.0/tsort.rb:411:in“每个强连接的组件”
from/usr/local/lib/ruby/2.1.0/tsort.rb:347:in“每个强连接的组件中的块”
from/usr/local/lib/ruby/2.1.0/tsort.rb:345:in'each'
from/usr/local/lib/ruby/2.1.0/tsort.rb:345:in'call'
from/usr/local/lib/ruby/2.1.0/tsort.rb:345:“每个强连接的组件”
from/usr/local/lib/ruby/2.1.0/tsort.rb:224:in'tsort_each'
from/usr/local/lib/ruby/2.1.0/tsort.rb:205:in'tsort_each'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/initializable.rb:54:in“run_initializers”
来自/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/application.rb:352:in'initialize！'
from/home/yonas/Documents/code/MCtut/commandsapp/config/environment.rb:5:in`'
from/home/yonas/Documents/code/MCtut/commandsapp/config.ru:3:in'require'
from/home/yonas/Documents/code/MCtut/commandsapp/config.ru:3:in'block in'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in'instance_eval'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:55:in'initialize'
from/home/yonas/Documents/code/MCtut/commandsapp/config.ru:in'new'
from/home/yonas/Documents/code/MCtut/commandsapp/config.ru:in`'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in'eval'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:49:in'new_from_string'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/builder.rb:40:in'parse_file'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:299:in'build_app_和_options_from_config'
from/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:208:in'app'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in'app'
从/usr/local/lib/ruby/gems/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:336:in'wrapp'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in'log_to_stdout'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in'start'
来自/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in“服务器中的块”
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in'tap'
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:在“服务器”中
from/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands\u tasks.rb:39:in“run\u command！”
来自/usr/local/lib/ruby/gems/2.1.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in`'
从箱子/轨道：4:in“require”
从箱子/轨道：4:in`'

您的机器上缺少

设计

宝石。检查

designe

是否在您的

gem文件中，如果未添加：

# in Gemfile
gem 'devise'

然后运行
bundler
安装所有应用程序的依赖项：

$ bundle install