Ruby on rails Heroku上全新Rails 5.2.1应用程序中的Javascript不'；我不能正常工作

我认为Heroku生产环境中Rails 5应用程序中的JavaScript文件存在一个大问题。不过，它在本地有效

我的配置：

Windows:   10 Education
Rails:     5.2.1
Ruby:      2.4.4p296
Heroku:    heroku/7.7.7 win32-x64 node-v10.7.0
postgres:  postgres (PostgreSQL) 10.3

现在，我将向您介绍我为确认它不起作用而采取的步骤，您可以自己尝试。最后，您将在Heroku上获得bitbucket回购和应用程序的链接

步骤1：创建新的Rails 5应用程序并切换到根文件夹

> rails new my_app --database=postgresql
> cd my_app

> rails generate controller static_pages

> rails server

Started GET "/" for 127.0.0.1 at 2018-09-03 18:43:52 +0200
Processing by StaticPagesController#show as HTML
  Rendering static_pages/show.html.erb within layouts/application
  Rendered static_pages/show.html.erb within layouts/application (12.2ms)
Completed 200 OK in 504ms (Views: 486.7ms | ActiveRecord: 0.0ms)


Started DELETE "/logout" for 127.0.0.1 at 2018-09-03 18:43:57 +0200
Processing by StaticPagesController#destroy as HTML
  Parameters: {"authenticity_token"=>"10NHmV8N4tF3O0r/YYtKtKmHm3xthGjPAE51osb7L9skCM5ZoM2RoiCtZD4Crh9d69ndTOeNRMmIW28ipI/z9A=="}
  Rendering static_pages/destroy.html.erb within layouts/application
  Rendered static_pages/destroy.html.erb within layouts/application (0.0ms)
Completed 200 OK in 90ms (Views: 73.0ms | ActiveRecord: 0.0ms)

步骤2：生成控制器

> rails new my_app --database=postgresql
> cd my_app

> rails generate controller static_pages

> rails server

Started GET "/" for 127.0.0.1 at 2018-09-03 18:43:52 +0200
Processing by StaticPagesController#show as HTML
  Rendering static_pages/show.html.erb within layouts/application
  Rendered static_pages/show.html.erb within layouts/application (12.2ms)
Completed 200 OK in 504ms (Views: 486.7ms | ActiveRecord: 0.0ms)


Started DELETE "/logout" for 127.0.0.1 at 2018-09-03 18:43:57 +0200
Processing by StaticPagesController#destroy as HTML
  Parameters: {"authenticity_token"=>"10NHmV8N4tF3O0r/YYtKtKmHm3xthGjPAE51osb7L9skCM5ZoM2RoiCtZD4Crh9d69ndTOeNRMmIW28ipI/z9A=="}
  Rendering static_pages/destroy.html.erb within layouts/application
  Rendered static_pages/destroy.html.erb within layouts/application (0.0ms)
Completed 200 OK in 90ms (Views: 73.0ms | ActiveRecord: 0.0ms)

步骤3：编辑/app/controllers/static\u pages\u controller文件

class StaticPagesController < ApplicationController
  def show
  end

  def destroy
  end
end

Rails.application.routes.draw do
  root 'static_pages#show'
  get 'static_pages/show'
  delete '/logout', to: 'static_pages#destroy'
end

> rails db:create
Created database 'my_app_development'
Created database 'my_app_test'

> rails db:migrate

步骤5：编辑/config/routes.rb文件

class StaticPagesController < ApplicationController
  def show
  end

  def destroy
  end
end

Rails.application.routes.draw do
  root 'static_pages#show'
  get 'static_pages/show'
  delete '/logout', to: 'static_pages#destroy'
end

> rails db:create
Created database 'my_app_development'
Created database 'my_app_test'

> rails db:migrate

步骤6：检查路线

> rails routes
                   Prefix Verb   URI Pattern                                                                              Controller#Action
                     root GET    /                                                                                        staticpages#show
         staticpages_show GET    /staticpages/show(.:format)                                                              staticpages#show
                   logout DELETE /logout(.:format)                                                                        staticpages#destroy
       rails_service_blob GET    /rails/active_storage/blobs/:signed_id/*filename(.:format)                               active_storage/blobs#show
rails_blob_representation GET    /rails/active_storage/representations/:signed_blob_id/:variation_key/*filename(.:format) active_storage/representations#show
       rails_disk_service GET    /rails/active_storage/disk/:encoded_key/*filename(.:format)                              active_storage/disk#show
update_rails_disk_service PUT    /rails/active_storage/disk/:encoded_token(.:format)                                      active_storage/disk#update
     rails_direct_uploads POST   /rails/active_storage/direct_uploads(.:format)                                           active_storage/direct_uploads#create

步骤7：创建数据库并迁移

class StaticPagesController < ApplicationController
  def show
  end

  def destroy
  end
end

Rails.application.routes.draw do
  root 'static_pages#show'
  get 'static_pages/show'
  delete '/logout', to: 'static_pages#destroy'
end

> rails db:create
Created database 'my_app_development'
Created database 'my_app_test'

> rails db:migrate

步骤8：启动服务器

> rails new my_app --database=postgresql
> cd my_app

> rails generate controller static_pages

> rails server

Started GET "/" for 127.0.0.1 at 2018-09-03 18:43:52 +0200
Processing by StaticPagesController#show as HTML
  Rendering static_pages/show.html.erb within layouts/application
  Rendered static_pages/show.html.erb within layouts/application (12.2ms)
Completed 200 OK in 504ms (Views: 486.7ms | ActiveRecord: 0.0ms)


Started DELETE "/logout" for 127.0.0.1 at 2018-09-03 18:43:57 +0200
Processing by StaticPagesController#destroy as HTML
  Parameters: {"authenticity_token"=>"10NHmV8N4tF3O0r/YYtKtKmHm3xthGjPAE51osb7L9skCM5ZoM2RoiCtZD4Crh9d69ndTOeNRMmIW28ipI/z9A=="}
  Rendering static_pages/destroy.html.erb within layouts/application
  Rendered static_pages/destroy.html.erb within layouts/application (0.0ms)
Completed 200 OK in 90ms (Views: 73.0ms | ActiveRecord: 0.0ms)

步骤9：转到localhost:3000/并单击显示的链接。该链接起作用并向服务器发送删除操作

> rails new my_app --database=postgresql
> cd my_app

> rails generate controller static_pages

> rails server

Started GET "/" for 127.0.0.1 at 2018-09-03 18:43:52 +0200
Processing by StaticPagesController#show as HTML
  Rendering static_pages/show.html.erb within layouts/application
  Rendered static_pages/show.html.erb within layouts/application (12.2ms)
Completed 200 OK in 504ms (Views: 486.7ms | ActiveRecord: 0.0ms)


Started DELETE "/logout" for 127.0.0.1 at 2018-09-03 18:43:57 +0200
Processing by StaticPagesController#destroy as HTML
  Parameters: {"authenticity_token"=>"10NHmV8N4tF3O0r/YYtKtKmHm3xthGjPAE51osb7L9skCM5ZoM2RoiCtZD4Crh9d69ndTOeNRMmIW28ipI/z9A=="}
  Rendering static_pages/destroy.html.erb within layouts/application
  Rendered static_pages/destroy.html.erb within layouts/application (0.0ms)
Completed 200 OK in 90ms (Views: 73.0ms | ActiveRecord: 0.0ms)

步骤10：创建heroku应用程序（您必须在系统上登录heroku）

第11步：将您的工作推给Heroku

> git add -A
> git commit -m "init"
> git push --set-upstream heroku master

第12步：打开你的Heroku应用程序，像第9步那样操作，但失败了，因为JavaScript似乎无法正常工作

(...) Started GET "/" for 84.147.254.28 at 2018-09-03 16:47:44 +0000
(...) Processing by StaticPagesController#show as HTML
(...)   Rendering static_pages/show.html.erb within layouts/application
(...)   Rendered static_pages/show.html.erb within layouts/application (9.2ms)
(...) Completed 200 OK in 27ms (Views: 13.7ms)
.
.
. 
(...) Started GET "/logout" for 84.147.254.28 at 2018-09-03 16:48:05 +0000
(...) ActionController::RoutingError (No route matches [GET] "/logout"):

这要么是Rails上的一个明显错误，要么是Heroku方面的一个明显错误，因为我所做的只是创建一个新的Rails应用程序，并更改了路由，生成了一个控制器，为控制器操作创建了两个视图

如果您想查看应用程序和部署到heroku的应用程序的所有源代码，请访问以下链接

您可以在此处查看源代码：

这里的应用程序：

是否有其他人在Rails和Heroku方面有这样的困难，或者我可以做些什么来让它工作

---

编辑：通过删除不必要的日志信息和时间戳，使步骤12的输出更加清晰

问题是

duktape

gem。这是一个Javascript引擎，在Rails世界中没有广泛使用，但默认情况下包含在新的Windows Rails安装中，因为它是唯一在Windows中实际工作的引擎之一。（如果您现在还没有弄清楚，那么Rails和windows开发人员就不多了：）

我不认为Heroku对它有很好的支持，所以当它启动引擎时，JS会默默地编译失败。如果您查看生产环境中的

application.js

文件，您将看到一堆

NaN:“选择[数据远程]、输入[数据远程]、文本区域[数据远程]”，在顶部，您将看到类似于
inputChangeSelector:“选择[数据远程]、输入[数据远程]、文本区域[数据远程]”`

如果您想让事情正常进行，请将
Duktape
gem从当前位置移到Gemfile、bundle和redeploy的
development
部分（您现在可以避免在主Gemfile中使用JS编译器）

我也会向Heroku开一张罚单。一般来说，他们会警告你类似这样的常见配置问题，但当我尝试部署你的应用程序时，我没有收到这样的警告。我可以想象，很多用户都没有收到这样的警告。
我解决了我的问题：是
丑陋的
宝石导致了问题，因为它工作不正常。我是j作为一个初学者，回顾一下这个gem应该是我需要检查的第一件事，因为它进行了JS压缩

现在JS运行得非常好。下面是我在
GemFile
中所做的更改，以使其正常工作：

从

到

uglifier
gem版本是
4.1.18
，在生产环境中导致此JS错误

希望这有助于其他人在Heroku上记录他们的JS错误
你从哪里得知错误与javascript有关？它在本地工作吗？是的，它在本地工作（如步骤9所示），正如我所说，它在生产模式中失败，但我编辑以使其更清晰。我知道它的javascript，因为应用程序需要“rails ujs”为了工作，没有它，它甚至在本地也不工作，我在生产模式下会出现JavaScript错误，而在本地控制台中根本没有。下面是我关于这个问题的另一个思路，让我澄清一下：如果你想在你的windows机上完成这些最小的步骤，并告诉我你是否可以重现错误，我将不胜感激rails在这一点上有问题吗？您是否尝试过查看浏览器控制台并实际尝试诊断javascript错误？我照您所说的做了。将duktape放入开发组并推送到Heroku。有一行内容说明
删除duktape（2.0.1.0）
在部署时。在尝试创建一个全新的Heroku应用程序时，仍然有很多NAN和错误，链接不起作用。我有一种预感，在第一次部署时，有一些部署设置被锁定。我也会联系Heroku支持人员，他们可能会提供更多帮助。我解决了这个问题，这是由
丑陋的人造成的我想在生产中有缺陷的宝石