Config.cache_classes heroku 上未初始化的常量控制器

Question

我刚刚将我的 rails 项目从 rails 4.2 升级到 rails 5.1.4。升级后我的主控制器开始崩溃。当我调用它时，它会在路由文件上抛出一个错误，指出“未初始化的主控制器”

搜索了很长时间后，我在我的 heroku 服务器上将 config.cache_classes 设置为 false，突然一切正常。虽然我无法在我的本地环境中重现逻辑。

任何人都知道在哪里搜索修复程序或如何修复此问题？我已经搜索了好几天，但没有找到它可能是什么！

很高兴提供任何人认为有用的详细信息以提供帮助！问就是了！

Ruby 版本 2.4.2

** 编辑 - 根据要求添加信息 **

完整错误是：

ActionController::RoutingError (uninitialized constant HomeController):

2017-11-26T15:16:55.051341+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/inflector/methods.rb:269:in `const_get'
2017-11-26T15:16:55.051342+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/inflector/methods.rb:269:in `block in constantize'
2017-11-26T15:16:55.051343+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/inflector/methods.rb:267:in `each'
2017-11-26T15:16:55.051343+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/inflector/methods.rb:267:in `inject'
2017-11-26T15:16:55.051344+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/inflector/methods.rb:267:in `constantize'
2017-11-26T15:16:55.051345+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:582:in `get'
2017-11-26T15:16:55.051346+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:613:in `constantize'
2017-11-26T15:16:55.051346+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/http/request.rb:85:in `controller_class_for'
2017-11-26T15:16:55.051347+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/http/request.rb:78:in `controller_class'
2017-11-26T15:16:55.051348+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:43:in `controller'
2017-11-26T15:16:55.051348+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:29:in `serve'
2017-11-26T15:16:55.051349+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:50:in `block in serve'
2017-11-26T15:16:55.051350+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `each'
2017-11-26T15:16:55.051350+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/journey/router.rb:33:in `serve'
2017-11-26T15:16:55.051351+00:00 app[web.1]: vendor/bundle/ruby/2.4.0/gems/actionpack-5.1.4/lib/action_dispatch/routing/route_set.rb:834:in `call'

控制器基于/myapp/app/HomeController.rb

class HomeController < ActionController::API

   def click
    # Execution of method, removed to keep post small
   end
end

/myapp/config 文件夹中的路由文件如下所示：

Rails.application.routes.draw do 

# root is set to a explainer json  
root to: "home#not_found"

# New Routes
get '/clk', to: 'home#click'

# wildcard for any route not matched
get "*unmatched_route", to: "tracking#not_found"
end

Answer 1

发现问题，它与 rails 5 中自动加载路径的更改有关。现在 eager_load_paths 应该用在 application.rb 而不是 autoload_paths

参考资料： https://github.com/rails/rails/commit/212ef5278b673aee304519d886d5db86a87b1437 https://blog.bigbinary.com/2016/08/29/rails-5-disables-autoloading-after-booting-the-app-in-production.html

Config.cache_classes heroku 上未初始化的常量控制器

Config.cache_classes unitialized constant controller on heroku

ruby

heroku

ruby-on-rails-5.1