本文介绍了WeBrick无法启动，在访问新的Rails应用程序时出现白色错误的处理方法，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
尝试启动WeBrick时出现错误.键入rails server时，出现以下错误:
I'm getting an error when I try to boot up WeBrick.When I type rails server, I get the following error:
C:\Users\xxxx\Documents\Sites\simple_cms>rails s
=> Booting WEBrick
=> Rails 4.2.4 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:40:in `<module:Helpers>': uninitialized constant ActionView::Helpers::ActiveModelHelper (NameError)
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:4:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/base.rb:5:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/view_paths.rb:1:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/rendering.rb:4:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionmailer-4.2.4/lib/action_mailer/base.rb:423:in `<class:Base>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionmailer-4.2.4/lib/action_mailer/base.rb:417:in `<module:ActionMailer>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionmailer-4.2.4/lib/action_mailer/base.rb:9:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionmailer-4.2.4/lib/action_mailer/railtie.rb:59:in `block in <class:Railtie>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-4.2.4/lib/active_support/lazy_load_hooks.rb:36:in `call'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-4.2.4/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-4.2.4/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-4.2.4/lib/active_support/lazy_load_hooks.rb:44:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/activesupport-4.2.4/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/application/finisher.rb:62:in `block in <module:Finisher>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `instance_exec'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `run'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:55:in `block in run_initializers'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:345:in `each'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:345:in `call'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from C:/Ruby22-x64/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:54:in `run_initializers'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:352:in `initialize!'
from C:/Users/xxxx/Documents/Sites/simple_cms/config/environment.rb:5:in `<top (required)>'
from C:/Users/xxxx/Documents/Sites/simple_cms/config.ru:3:in `require'
from C:/Users/xxxx/Documents/Sites/simple_cms/config.ru:3:in `block in <main>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from C:/Users/xxxx/Documents/Sites/simple_cms/config.ru:in `new'
from C:/Users/xxxx/Documents/Sites/simple_cms/config.ru:in `<main>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/server.rb:61:in `app'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/server.rb:139:in `log_to_stdout'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/server.rb:78:in `start'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:80:in `block in server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `tap'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
这是宝石文件:
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.4'
# Use mysql as the database for Active Record
gem 'mysql2'
# Use SCSS for stylesheets
#gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
#gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
#gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
#gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
#gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
#gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
#gem 'sdoc', '~> 0.4.0', group: :doc
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
#group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
#gem 'byebug'
#end
#group :development do
# Access an IRB console on exception pages or by using <%= console %> in views
#gem 'web-console', '~> 2.0'
#end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
有人可以帮我解决这个问题吗?
Can anybody help me fix this?
PS:我正在Windows 10上运行
PS: I am running on Windows 10
推荐答案
尝试将此行添加到您的Gemfile
Try adding this line to your Gemfile
gem 'rack', '~> 1.6.4'
然后运行:
bundle install
看看是否能解决您的问题.
and see if that fixes your issue.
如果上述方法无效，请尝试卸载railties gem.然后安装rails的旧版本(本教程中使用的是Rails版本4.0.0).该问题是由于某些宝石的版本不匹配/不兼容造成的.
If the above does not work, try uninstalling railties gem. Then install an older version of the rails (rails version 4.0.0 was used in the from the tutorial). The issue is due to the version mismatch/incompatibility of some of your gems.
这篇关于WeBrick无法启动，在访问新的Rails应用程序时出现白色错误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！