未初始化的常量 ActionController::Caching::Sweeper

Question

在预编译生产环境时，我收到 未初始化的常量 ActionController::Caching::Sweeper 错误（与 heroku 相同）。在开发环境中，使用 localhost 一切正常。感谢您的任何建议。

C:\Sites\code\myapp>bundle exec rake assets:precompile RAILS_ENV=production --trace
** Invoke assets:precompile (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
rake aborted!
uninitialized constant ActionController::Caching::Sweeper
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/bundler/gems/spree_reviews-5447d2231446/app/models/spree/review_sweeper.rb:1:in `<top (required)>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/engine.rb:464:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/engine.rb:464:in `block in eager_load!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/engine.rb:462:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/engine.rb:462:in `eager_load!'
C:in `eager_load!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:150:in `block in tsort_each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:219:in `each_strongly_connected_component_from'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:182:in `block in each_strongly_connected_component'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:180:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:180:in `each_strongly_connected_component'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/tsort.rb:148:in `tsort_each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
C:/Sites/code/farmfood/config/environment.rb:5:in `<top (required)>'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `require'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `require'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `call'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `block in execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:161:in `invoke'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/sprockets-rails-2.0.0/lib/sprockets/rails/task.rb:54:in `block (2 levels) in define'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `call'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:236:in `block in execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:231:in `execute'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:197:in `block in invoke_prerequisites'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:195:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:195:in `invoke_prerequisites'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:174:in `block in invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/task.rb:161:in `invoke'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:149:in `invoke_task'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `each'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:106:in `block in top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:115:in `run_with_threads'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:100:in `top_level'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:78:in `block in run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/rake-10.1.0/bin/rake:33:in `<top (required)>'
C:/RailsInstaller/Ruby1.9.3/bin/rake:23:in `load'
C:/RailsInstaller/Ruby1.9.3/bin/rake:23:in `<main>'
Tasks: TOP => environment

Answer 1

这是由于bug in the rails-observers gem。 The bug has been fixed，但修复尚未到达rubygems.org。

使用GitHub 中的rails-observers 版本，方法是在您的Gemfile 中替换此行：

gem 'rails-observers'

有了这个：

gem 'rails-observers', git: 'https://github.com/rails/rails-observers.git'

Answer 2

这是rails-observers 中的一个错误。 https://github.com/rails/rails-observers/issues/4

Answer 3

感谢@khustochka 让我走上正轨

我解决了我的问题：

安装 gem 'rails-observers' https://github.com/rails/rails-observers

然后我添加到production.rb

  config.dependency_loading = true if $rails_rake_task
  config.active_record.observers = :contact_observer

由于我得到未初始化的常量 ActiveModel::Observer 错误

我在 app/models 中创建了文件contact_observe.rb

 class ContactObserver < ActiveRecord::Observer
   observe :user
 end

在我做了rake db:migrate RAILS_ENV=production之后 和rake asset precompile RAILS_ENV=production

我的问题解决了

Answer 4

发生这种情况是因为 spree_reviews 扩展依赖于 Rails 的一项功能，该功能已在 Rails 4 中删除。请在该项目上提交有关此问题的问题。