如何修复错误＆＃34;在自动加载常量时检测到循环依赖性＆＃34;在Heroku / Ruby上

时间：2017-01-26 23:06:04

标签： ruby-on-rails activesupport-concern

我部署后在Heroku上收到此错误，但我没有收到错误或在本地遇到问题。

以下命名/命名空间等有什么问题？我错过了什么？

模型/关切/购买/ finalize_utils.rb 

module Purchase::FinalizeUtils
  extend ActiveSupport::Concern
end

模型/ purchase.rb 

class Purchase < ActiveRecord::Base 
  include FinalizeUtils
end

日志错误：

2017-01-26T22:39:25.553902+00:00 app[web.1]: RuntimeError: Circular dependency detected while autoloading constant Purchase::FinalizeUtils
2017-01-26T22:39:25.553903+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:492:in `load_missing_constant'
2017-01-26T22:39:25.553903+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:184:in `const_missing'
2017-01-26T22:39:25.553904+00:00 app[web.1]:   /app/app/models/purchase.rb:19:in `<class:Purchase>'
2017-01-26T22:39:25.553904+00:00 app[web.1]:   /app/app/models/purchase.rb:16:in `<top (required)>'
2017-01-26T22:39:25.553905+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
2017-01-26T22:39:25.553906+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `block in require'
2017-01-26T22:39:25.553906+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
2017-01-26T22:39:25.553907+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
2017-01-26T22:39:25.553907+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:360:in `require_or_load'
2017-01-26T22:39:25.553907+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:494:in `load_missing_constant'
2017-01-26T22:39:25.553908+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:184:in `const_missing'
2017-01-26T22:39:25.553909+00:00 app[web.1]:   /app/app/models/concerns/purchase/finalize_utils.rb:1:in `<top (required)>'
2017-01-26T22:39:25.553909+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
2017-01-26T22:39:25.553909+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `block in require'
2017-01-26T22:39:25.553910+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in `load_dependency'
2017-01-26T22:39:25.553910+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in `require'
2017-01-26T22:39:25.553910+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:360:in `require_or_load'
2017-01-26T22:39:25.553911+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:317:in `depend_on'
2017-01-26T22:39:25.553912+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:472:in `block (2 levels) in eager_load!'
2017-01-26T22:39:25.553911+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:233:in `require_dependency'
2017-01-26T22:39:25.553912+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:471:in `each'
2017-01-26T22:39:25.553912+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:471:in `block in eager_load!'
2017-01-26T22:39:25.553913+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:469:in `each'
2017-01-26T22:39:25.553913+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:469:in `eager_load!'
2017-01-26T22:39:25.553914+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/engine.rb:346:in `eager_load!'
2017-01-26T22:39:25.553914+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:in `each'
2017-01-26T22:39:25.553914+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
2017-01-26T22:39:25.553915+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:in `instance_exec'
2017-01-26T22:39:25.553915+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:in `run'
2017-01-26T22:39:25.553915+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:55:in `block in run_initializers'
2017-01-26T22:39:25.553916+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
2017-01-26T22:39:25.553916+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
2017-01-26T22:39:25.553917+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
2017-01-26T22:39:25.553917+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
2017-01-26T22:39:25.553917+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each'
2017-01-26T22:39:25.553918+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `call'
2017-01-26T22:39:25.553918+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
2017-01-26T22:39:25.553918+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
2017-01-26T22:39:25.553919+00:00 app[web.1]:   /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
2017-01-26T22:39:25.553921+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:54:in `run_initializers'
2017-01-26T22:39:25.553921+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:352:in `initialize!'
2017-01-26T22:39:25.553922+00:00 app[web.1]:   /app/config/environment.rb:11:in `<top (required)>'

1 个答案:

答案 0 :(得分：1)

对于遇到这个问题的未来人来说，它的价值是什么，我发现我的问题是各种各样的问题。

首先，如果生产和开发是这样的设置，那么它的功能会有所不同：

config.eager_load

它没有因类似的设置而失败的原因＆＃34; （即User :: MyModule）似乎与为eager_loading处理文件的顺序有关。

问题是关注似乎有时会在模型之前加载，有时反过来。两个版本都有问题，因为类购买并不被视为同一个类（因为一个是子类，一个不是）并且没有正确地重新打开。

所以我需要改变这个：

module Purchase::FinalizeUtils
  extend ActiveSupport::Concern
end

到此：

#models/concerns/purchase/finalize_utils.rb 
class Purchase < ActiveRecord::Base  
  module FinalizeUtils
    extend ActiveSupport::Concern
    end
  end
end

这允许重新打开Purchase类而不是重新定义。或类似的东西。无论哪种方式，上面的方法允许我命名我的问题，包括这样：

#models/purchase.rb
class Purchase < ActiveRecord::Base 
  include FinalizeUtils
end

该文件未被延迟加载命名，但由于该模块在类中，因此查找路径会找到它。

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