Question

系统：

Ruby：2.6.3p62（rvm）
滑轨：6.0
操作系统：macOS 10.14.6

设置

全新的Rails 6.0应用程序：

$ rails new testshop2
$ cd testshop2
$ rails g controller Page index
$ rails s
=> Booting Puma
=> Rails 6.0.0 application starting in development 
=> Run `rails server --help` for more startup options
Puma starting in single mode...
* Version 3.12.1 (ruby 2.6.3-p62), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Use Ctrl-C to stop

当我浏览到“ http://localhost:3000/page/index”时，系统会遇到以下错误：

Started GET "/page/index" for ::1 at 2019-09-23 17:06:12 +0200
  (0.4ms)  SELECT sqlite_version(*)
Processing by PageController#index as HTML
  Rendering page/index.html.erb within layouts/application
  Rendered page/index.html.erb within layouts/application (Duration: 1.8ms | Allocations: 206)
[Webpacker] Compiling…
[Webpacker] Compilation failed:
error Command "webpack" not found.

Completed 500 Internal Server Error in 2021ms (ActiveRecord: 0.0ms | Allocations: 640080)



ActionView::Template::Error (Webpacker can't find application in /Users/stefan/Github/sandbox/testshop2/public/packs/manifest.json. Possible causes:
1. You want to set webpacker.yml value of compile to true for your environment
  unless you are using the `webpack -w` or the webpack-dev-server.
2. webpack has not yet re-run to reflect updates.
3. You have misconfigured Webpacker's config/webpacker.yml file.
4. Your webpack configuration is not creating a manifest.
Your manifest contains:
{
}
):
    6:     <%= csp_meta_tag %>
    7: 
    8:     <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
    9:     <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
    10:   </head>
    11: 
    12:   <body>

app/views/layouts/application.html.erb:9

我该如何解决？它说error Command "webpack" not found.，但Rails不应自动安装所需的所有东西吗？

Answer 1

编辑：

这是我的第一篇文章之一，因此，如果我发现发布惯例有误，请原谅我。

问题来自本地计算机上的节点版本。当您创建Rails应用程序时，您可能会遇到这样的错误消息：

The JavaScript app source directory already exists
   apply  /Users/mconiaris/.rbenv/versions/2.6.4/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/install/binstubs.rb
  Copying binstubs
       exist    bin
      create    bin/webpack
      create    bin/webpack-dev-server
      append  .gitignore
Installing all JavaScript dependencies [4.0.7]
         run  yarn add @rails/webpacker from "."
yarn add v1.17.3
info No lockfile found.
[1/4] ?  Resolving packages...
warning @rails/webpacker > postcss-preset-env > postcss-color-functional-notation > postcss-values-parser > flatten@1.0.2: I wrote this module a very long time ago; you should use something else.
[2/4] ?  Fetching packages...
error get-caller-file@2.0.5: The engine "node" is incompatible with this module. Expected version "6.* || 8.* || >= 10.*". Got "9.4.0"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

就我而言，我的计算机上安装了9.4.0版的node，而那是get-caller-file软件包不希望使用的版本。

要解决此问题，请首先确认您的节点版本，以确保它不是9.x.x：

node -v

更新节点（我使用nvm，但是other ways on GitHub网站上有node）。

nvm install node # "node" is an alias for the latest version

再次检查版本。如果它是12.10或更高，则应该一切就绪。

开始另一个全新的Rails项目，它应该可以正常工作。

祝你好运！

Answer 2

我遇到了同样的问题。并尝试按照@AFOC的答案建议运行bundle exec rails webpacker:install。然后我意识到我的节点版本与rails / webpacker不兼容。然后使用节点12.x。可以。

我也尝试删除整个应用程序，然后再次创建该应用程序，但再也没有遇到此问题，它第一次起作用。因此，在我的情况下，它是节点版本。

Answer 3

我最终去除了纱线。解决了这个问题中提出的错误后，我又遇到了毛线问题。我不知道我是否应该交叉发布我的解决方案，因为它是相同的。或只是链接到它

https://stackoverflow.com/a/58100373/683982

希望这对某人有帮助

Answer 4

我在全新的6.0安装上也遇到了这个问题，就我所知，它与节点或纱线无关。我注意到package.json中没有提到webpack，因此我运行yarn add webpack并再次尝试。我得到以下内容，它说已编译，但页面仍未加载：

[Webpacker] Compiled all packs in /vagrant/revmtg/RevMtg/public/packs
[Webpacker] One CLI for webpack must be installed. These are recommended choices, delivered as separate packages:
 - webpack-cli (https://github.com/webpack/webpack-cli)
   The original webpack full-featured CLI.

所以我跑了yarn add webpack-cli。然后我得到了Error: Cannot find module '@rails/webpacker'。

因此，我删除了node_modules文件夹，然后运行了bundle exec rails webpacker:install。之后，它终于工作了。

Answer 5

尝试在 Ubuntu 20.04 中建立新的 Rails 6 应用程序时，我遇到了同样的挑战。

启动Rails服务器时，出现错误：

error Command "webpack" not found.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
09:17:58 webpacker.1 | exited with code 1
09:17:58 system      | sending SIGTERM to all processes
09:17:58 watcher.1   | exited with code 1
09:17:58 web.1       | terminated by SIGTERM

这是我修复的方式：

对我来说，这个问题是由于互联网连接状况不佳而导致，无法完全安装webpacker及其所有依赖项。因此，每次我运行命令：

bundle exec rails webpacker:install

我得到以下输出：

Installing all JavaScript dependencies [4.3.0]
         run  yarn add @rails/webpacker@4.3.0 from "."
yarn add v1.22.5
[1/4] Resolving packages...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...

我只需要移到互联网连接更好的区域，然后运行命令：

bundle exec rails webpacker:install

OR

rails webpacker:install

这次，它成功运行并安装了webpacker及其所有依赖项，并给了我最后的输出：

[4/4] Building fresh packages...
success Saved 1 new dependency.
info Direct dependencies
└─ webpack-dev-server@3.11.0
info All dependencies
└─ webpack-dev-server@3.11.0
Done in 5.90s.

仅此而已。

我希望这会有所帮助

Answer 6

这意味着您的应用程序中以某种方式缺少或卸载了 webpacker。

rails webpacker:install

应该可以解决您的问题。

Answer 7

尝试这样做：

bundle exec rails webpacker:install

如果还是不行就试试：

 npm install
yarn install check--files

香草Rails 6.0：“错误命令” webpack“未找到”

系统：

设置

7 个答案: