问题
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>'
Here is the Gemfile:
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]
Can anybody help me fix this?
PS: I am running on Windows 10
回答1:
Try adding this line to your Gemfile
gem 'rack', '~> 1.6.4'
and then run:
bundle install
and see if that fixes your issue.
Update
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.
来源：https://stackoverflow.com/questions/32411841/webrick-does-not-bootup-gives-an-error-white-accessing-new-rails-app