Ruby, Rails 不值一学

这是前两天开的帖：https://www.v2ex.com/t/723318

我的工作是 Go 开发，因为总听说 Ruby 、Rails 很吊，所以业余打算学学，选了《 Agile web development with Rails 6 》一书看的，折腾了 3 天准备放弃了，真的不值一学。

如果一项编程语言的入门，大量时间要花到折腾环境、各种乱七八糟的报错上而无法聚焦到语言、框架本身，那还谈什么提高？

当初学 Go 也就小半天搭了环境就开始写了，Rails 整了 3 天，每天十个小时，到现在rails new demo都没跑起来，确切的说是没完全跑起来。

安装 Ruby 、Rails就不说了，rails new demo各种报错，最后localhost:3000访问到了，但是自从执行了bin/rails generate controller Say hello goodbye，历数我遇到的各种奇怪的报错，完全没有任何解决方案：

比如执行bin/webpack-dev-server报错：

node:internal/modules/cjs/loader:903
  throw err;
  ^

Error: Cannot find module 'webpack-cli/bin/config-yargs'
Require stack:

官方 github issure 各种说版本问题，还让在packge.json加了scripts:代码，换成webpack serve啥的，没点用，我就奇怪了前端圈各种软件库啥的升级从来不考虑向后兼容吗？约定的命令说改就改，改了还没啥用，解决不了旧问题还制造一堆新问题。github 、stack overflow 、csdn 之流都没有任何解决方案：https://github.com/webpack/webpack-dev-server/issues/2759, https://blog.csdn.net/Piconjo/article/details/105744808

比如Cannot find module '@rails/webpacker'报错：
- 岛国的,没点用:https://qiita.com/MosamosaPoodle/items/e051d0a8921314f5f9ed
比如rails new --webpack fails with "Don't know how to build task 'webpacker:install'"报错:
- https://github.com/rails/webpacker/issues/61 没点用
- https://github.com/makandra/katapult/issues/13 没点用
比如Getting undefined method 'javascript_pack_tag' for报错：
- https://github.com/rails/webpacker/issues/172 没点用
比如Command "webpack" not found报错：
- https://github.com/rails/webpacker/issues/522 没点用
- https://stackoverflow.com/questions/44845143/webpack-command-not-found没点用
比如ActionView::Template::Error: Webpacker can't find application in /app/public/packs/manifest.json报错：

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唯一一个解决的问题是执行bin/rails generate controller Say hello goodbye没啥反应，用了spring stop
现在我的 rails 是这样的：

$ bin/rails about

About your application's environment
Rails version             6.0.3.4
Ruby version              ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]
RubyGems version          3.1.4
Rack version              2.2.3
Middleware                Webpacker::DevServerProxy, ActionDispatch::HostAuthorization, Rack::Sendfile, ActionDispatch::Static, ActionDispatch::Executor, ActiveSupport::Cache::Strategy::LocalCache::Middleware, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, ActionDispatch::RemoteIp, Sprockets::Rails::QuietAssets, Rails::Rack::Logger, ActionDispatch::ShowExceptions, WebConsole::Middleware, ActionDispatch::DebugExceptions, ActionDispatch::ActionableExceptions, ActionDispatch::Reloader, ActionDispatch::Callbacks, ActiveRecord::Migration::CheckPending, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ContentSecurityPolicy::Middleware, Rack::Head, Rack::ConditionalGet, Rack::ETag, Rack::TempfileReaper
Application root          /Users/coool/ruby/work/demo
Environment               development
Database adapter          sqlite3
Database schema version   0

package.json文件是这样的：

{
  "name": "demo",
  "private": true,
  "dependencies": {
    "@rails/actioncable": "^6.0.0",
    "@rails/activestorage": "^6.0.0",
    "@rails/ujs": "^6.0.0",
    "turbolinks": "^5.2.0",
    "webpack": "^5.4.0"
  },
  "scripts": {
    "serve": "webpack serve"
  },
  "version": "0.1.0",
  "devDependencies": {
    "webpack-cli": "^4.2.0",
    "webpack-dev-server": "^3.11.0"
  },
  "babel": {
    "presets": [
      "./node_modules/@rails/webpacker/package/babel/preset.js"
    ]
  },
  "browserslist": [
    "defaults"
  ]
}

可能 Rails 确实是殿堂级的框架，但是这个框架的门槛在云上，我在地上上不去……各种环境、升级、代理设置、global 翻墙都没用、版本不兼容、乱七八糟的报错，是我在写 Go 的时候从来没有遇到过的。

另外吐槽一下 Ruby-China 真的……不知道有多少人的耐心是 7 天，反正我这三天，每天十几个小时的折腾这些报错已经耗尽了耐心，放弃了。