我有一个成功构建在我的本地系统上的应用程序，但是当部署到Heroku或以rails server -e production运行时产生：
=> Rails 4.0.0 application starting in production on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/home/nmradar/Documents/old-manager/app/controllers/registrations_controller.rb:2:in `<top (required)>': uninitialized constant Users (NameError)
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:464:in `each'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:464:in `block in eager_load!'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:462:in `each'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:462:in `eager_load!'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/engine.rb:347:in `eager_load!'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `each'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /home/nmradar/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/nmradar/Documents/old-manager/config/environment.rb:5:in `<top (required)>'
from /home/nmradar/Documents/old-manager/config.ru:3:in `block in <main>'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /home/nmradar/Documents/old-manager/config.ru:in `new'
from /home/nmradar/Documents/old-manager/config.ru:in `<main>'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:48:in `app'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:75:in `start'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:78:in `block in <top (required)>'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:73:in `tap'
from /home/nmradar/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:73:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
我的environment.rb是
# Load the Rails application.
require File.expand_path('../application', __FILE__)
# Initialize the Rails application.
OldManager::Application.initialize!
并且registrations_controller.rb是
# controllers/users/registrations_controller.rb
class Users::RegistrationsController < Devise::RegistrationsController
before_filter :configure_permitted_parameters
protected
# my custom fields are :name
devise_parameter_sanitizer.for(:sign_up) do |u|
u.permit(:name, :major, :email, :password, :password_confirmation)
end
devise_parameter_sanitizer.for(:account_update) do |u|
u.permit(:name, :email, :password, :password_confirmation, :current_password)
end
end
如果我在config.eager_load = true中将config.eager_load = false切换为config/environment/production.rb，我可以成功启动服务器并使用我的应用程序。我认为eager_load是生产环境的理想功能，否则默认情况下不会启用它。那么我需要做些什么来允许我的应用程序在启用eager_load的情况下运行，或者如何才能找到有关它导致服务器崩溃的原因的更多信息？如果需要其他文件来解决这个问题，请告诉我。
我正在运行Rails 4和Ruby 2.0.0。
感谢您的任何建议！
答案 0 :(得分：0)
错误是：
未初始化的常量用户（NameError）
查看控制器的声明..