我一直在关注Daniel Kehoe的Learn Rails教程，一切都在开发中运作良好。
当迁移到Heroku时，我不得不处理thread_safe版本问题（更新到v0.3.3），但结果是：
Launching... done, v7
但是，当我访问应用程序网站 - http://learnrailstutorial.herokuapp.com时 - 我收到以下错误消息：
应用程序错误应用程序和页面中发生错误 无法提供服务。请稍后重试。如果你是 应用程序所有者，请检查日志以获取详细信息。
以下是我在日志中的内容：
$ heroku logs
2014-04-13T18:35:12.897931+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
2014-04-13T18:35:12.897930+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
2014-04-13T18:35:12.897933+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:54:in `run_initializers'
2014-04-13T18:35:12.897934+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/application.rb:215:in `initialize!'
2014-04-13T18:35:12.897935+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/railtie/configurable.rb:30:in `method_missing'
2014-04-13T18:35:12.897937+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2014-04-13T18:35:12.897938+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:12.897940+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `block in require'
2014-04-13T18:35:12.897941+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-04-13T18:35:12.897942+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:12.897946+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2014-04-13T18:35:12.897948+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
2014-04-13T18:35:12.897949+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
2014-04-13T18:35:12.897950+00:00 app[web.1]: from /app/config.ru:in `new'
2014-04-13T18:35:12.897952+00:00 app[web.1]: from /app/config.ru:in `<main>'
2014-04-13T18:35:12.897955+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
2014-04-13T18:35:12.897956+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
2014-04-13T18:35:12.897953+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
2014-04-13T18:35:12.897957+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2014-04-13T18:35:12.897958+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
2014-04-13T18:35:12.897960+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands/server.rb:48:in `app'
2014-04-13T18:35:12.897963+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
2014-04-13T18:35:12.897965+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands/server.rb:75:in `start'
2014-04-13T18:35:12.897966+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:76:in `block in <top (required)>'
2014-04-13T18:35:12.897969+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `<top (required)>'
2014-04-13T18:35:12.897967+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `tap'
2014-04-13T18:35:12.897970+00:00 app[web.1]: from bin/rails:4:in `require'
2014-04-13T18:35:12.897971+00:00 app[web.1]: from bin/rails:4:in `<main>'
2014-04-13T18:35:12.916586+00:00 app[web.1]: => Rails 4.0.4 application starting in production on http://0.0.0.0:57365
2014-04-13T18:35:12.916579+00:00 app[web.1]: => Booting Thin
2014-04-13T18:35:12.916588+00:00 app[web.1]: => Run `rails server -h` for more startup options
2014-04-13T18:35:12.916592+00:00 app[web.1]: Exiting
2014-04-13T18:35:12.916590+00:00 app[web.1]: => Ctrl-C to shutdown server
2014-04-13T18:35:14.054222+00:00 heroku[web.1]: State changed from starting to crashed
2014-04-13T18:35:14.055058+00:00 heroku[web.1]: State changed from crashed to starting
2014-04-13T18:35:14.042388+00:00 heroku[web.1]: Process exited with status 1
2014-04-13T18:35:18.252062+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 40719 -e production`
2014-04-13T18:35:21.022699+00:00 app[web.1]: from /app/config/environments/production.rb:82:in `block in <top (required)>'
2014-04-13T18:35:21.022703+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/railtie/configurable.rb:24:in `configure'
2014-04-13T18:35:21.022693+00:00 app[web.1]: /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/railtie/configurable.rb:30:in `method_missing': undefined method `learnrailstutorial' for #<LearnRails::Application:0x007fea7aac87f0> (NoMethodError)
2014-04-13T18:35:21.022701+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/railtie/configurable.rb:24:in `class_eval'
2014-04-13T18:35:21.022704+00:00 app[web.1]: from /app/config/environments/production.rb:1:in `<top (required)>'
2014-04-13T18:35:21.022705+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:21.022707+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `block in require'
2014-04-13T18:35:21.022708+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-04-13T18:35:21.022709+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:21.022712+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/engine.rb:590:in `each'
2014-04-13T18:35:21.022715+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:30:in `instance_exec'
2014-04-13T18:35:21.022718+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
2014-04-13T18:35:21.022716+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:30:in `run'
2014-04-13T18:35:21.022724+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
2014-04-13T18:35:21.022711+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
2014-04-13T18:35:21.022726+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
2014-04-13T18:35:21.022725+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
2014-04-13T18:35:21.022713+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/engine.rb:590:in `block in <class:Engine>'
2014-04-13T18:35:21.022717+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:55:in `block in run_initializers'
2014-04-13T18:35:21.022729+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:44:in `tsort_each_child'
2014-04-13T18:35:21.022730+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
2014-04-13T18:35:21.022731+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
2014-04-13T18:35:21.022722+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
2014-04-13T18:35:21.022728+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:44:in `each'
2014-04-13T18:35:21.022735+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
2014-04-13T18:35:21.022734+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
2014-04-13T18:35:21.022736+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/initializable.rb:54:in `run_initializers'
2014-04-13T18:35:21.022732+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each'
2014-04-13T18:35:21.022739+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/railtie/configurable.rb:30:in `method_missing'
2014-04-13T18:35:21.022740+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2014-04-13T18:35:21.022737+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/application.rb:215:in `initialize!'
2014-04-13T18:35:21.022741+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:21.022743+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `block in require'
2014-04-13T18:35:21.022744+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-04-13T18:35:21.022754+00:00 app[web.1]: from /app/config.ru:in `<main>'
2014-04-13T18:35:21.022753+00:00 app[web.1]: from /app/config.ru:in `new'
2014-04-13T18:35:21.022747+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
2014-04-13T18:35:21.022749+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2014-04-13T18:35:21.022750+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
2014-04-13T18:35:21.022751+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
2014-04-13T18:35:21.022756+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
2014-04-13T18:35:21.022758+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
2014-04-13T18:35:21.022759+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2014-04-13T18:35:21.022760+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
2014-04-13T18:35:21.022755+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
2014-04-13T18:35:21.022761+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands/server.rb:48:in `app'
2014-04-13T18:35:21.022763+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
2014-04-13T18:35:21.022764+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands/server.rb:75:in `start'
2014-04-13T18:35:21.022769+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `<top (required)>'
2014-04-13T18:35:21.022765+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:76:in `block in <top (required)>'
2014-04-13T18:35:21.022768+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `tap'
2014-04-13T18:35:21.022771+00:00 app[web.1]: from bin/rails:4:in `require'
2014-04-13T18:35:21.022772+00:00 app[web.1]: from bin/rails:4:in `<main>'
2014-04-13T18:35:21.042421+00:00 app[web.1]: => Booting Thin
2014-04-13T18:35:21.042428+00:00 app[web.1]: => Rails 4.0.4 application starting in production on http://0.0.0.0:40719
2014-04-13T18:35:21.042430+00:00 app[web.1]: => Run `rails server -h` for more startup options
2014-04-13T18:35:21.042432+00:00 app[web.1]: => Ctrl-C to shutdown server
2014-04-13T18:35:21.042433+00:00 app[web.1]: Exiting
2014-04-13T18:35:22.361455+00:00 heroku[web.1]: Process exited with status 1
2014-04-13T18:35:22.374267+00:00 heroku[web.1]: State changed from starting to crashed
2014-04-13T18:36:06.763404+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=learnrailstutorial.herokuapp.com request_id=5c27afbd-ac1c-4525-b7eb-0cea294ec22b fwd="76.88.15.167" dyno= connect= service= status=503 bytes=
2014-04-13T18:36:18.195687+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=learnrailstutorial.herokuapp.com request_id=9431bd21-bb32-4826-b5ea-10e578db1b22 fwd="76.88.15.167" dyno= connect= service= status=503 bytes=
2014-04-13T18:37:19.982092+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=learnrailstutorial.herokuapp.com request_id=e7dcd7ad-3120-4157-b93e-63e89f589aeb fwd="76.88.15.167" dyno= connect= service= status=503 bytes=
2014-04-13T18:39:17.034025+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=learnrailstutorial.herokuapp.com request_id=2f0adb38-6273-42e9-90a4-43f92fc6f7bd fwd="76.88.15.167" dyno= connect= service= status=503 bytes=
有任何想法解决这个问题吗？
非常感谢。
编辑：这是我的production.rb文件
LearnRails::Application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# Code is not reloaded between requests.
config.cache_classes = true
# Eager load code on boot. This eager loads most of Rails and
# your application in memory, allowing both thread web servers
# and those relying on copy on write to perform better.
# Rake tasks automatically ignore this option for performance.
config.eager_load = true
# Full error reports are disabled and caching is turned on.
config.consider_all_requests_local = false
config.action_controller.perform_caching = true
# Enable Rack::Cache to put a simple HTTP cache in front of your application
# Add `rack-cache` to your Gemfile before enabling this.
# For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
# config.action_dispatch.rack_cache = true
# Disable Rails's static asset server (Apache or nginx will already do this).
config.serve_static_assets = false
# Compress JavaScripts and CSS.
config.assets.js_compressor = :uglifier
# config.assets.css_compressor = :sass
# Do not fallback to assets pipeline if a precompiled asset is missed.
config.assets.compile = false
# Generate digests for assets URLs.
config.assets.digest = true
# Version of your assets, change this if you want to expire all your assets.
config.assets.version = '1.0'
# Specifies the header that your server uses for sending files.
# config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
# config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
# Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
# config.force_ssl = true
# Set to :debug to see everything in the log.
config.log_level = :info
# Prepend all log lines with the following tags.
# config.log_tags = [ :subdomain, :uuid ]
# Use a different logger for distributed setups.
# config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
# Use a different cache store in production.
# config.cache_store = :mem_cache_store
# Enable serving of images, stylesheets, and JavaScripts from an asset server.
# config.action_controller.asset_host = "http://assets.example.com"
# Precompile additional assets.
# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
# config.assets.precompile += %w( search.js )
# Ignore bad email addresses and do not raise email delivery errors.
# Set this to true and configure the email server for immediate delivery to raise delivery errors.
# config.action_mailer.raise_delivery_errors = false
# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation can not be found).
config.i18n.fallbacks = true
# Send deprecation notices to registered listeners.
config.active_support.deprecation = :notify
# Disable automatic flushing of the log to improve performance.
# config.autoflush_log = false
# Use default logging formatter so that PID and timestamp are not suppressed.
config.log_formatter = ::Logger::Formatter.new
# email enabled in production
config.action_mailer.default_url_options = { :host => learnrailstutorial.herokuapp.com }
config.action_mailer.delivery_method = :smtp
config.action_mailer.perform_deliveries = true
config.action_mailer.raise_delivery_errors = false
config.action_mailer.default :charset => "utf-8"
config.action_mailer.smtp_settings = {
address: "smtp.gmail.com",
port: 587,
domain: learnrailstutorial.herokuapp.com,
authentication: "plain",
enable_starttls_auto: true,
user_name: ENV["GMAIL_USERNAME"],
password: ENV["GMAIL_PASSWORD"]
}
end
这是我的路线：
LearnRails::Application.routes.draw do
resources :contacts, only: [:new, :create]
resources :visitors, only: [:new, :create]
root to: 'visitors#new'
end
答案 0 :(得分：1)
在production.rb，
更改
config.action_mailer.default_url_options = { :host => learnrailstutorial.herokuapp.com }
要
config.action_mailer.default_url_options = { :host => "learnrailstutorial.herokuapp.com" }
同样更新domain中的config.action_mailer.smtp_settings选项值。
由于主机名不在引号中，Rails会将其解释为方法名称并寻找其定义。如果您注意到错误日志，则会看到
method_missing': undefined method 'learnrailstutorial