Rob*_*ois 25 ruby-on-rails webpack ruby-on-rails-6
我正在根据“Rails 入门”创建一个新的 Rails 应用程序。应用程序在步骤 4.1 中正常启动。但是当我创建我的第一个控制器时，我有一个 webpack 错误。
我是 webpack 的新手，我的所有文档都是红色的，但我不明白有什么问题或遗漏了什么......
rails webpacker:install
identical config/webpacker.yml
Copying webpack core config
exist config/webpack
identical config/webpack/development.js
identical config/webpack/environment.js
identical config/webpack/production.js
identical config/webpack/test.js
Copying postcss.config.js to app root directory
identical postcss.config.js
Copying babel.config.js to app root directory
identical babel.config.js
Copying .browserslistrc to app root directory
identical .browserslistrc
The JavaScript app source directory already exists
apply C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/install/binstubs.rb
Copying binstubs
exist bin
identical bin/webpack
identical bin/webpack-dev-server
append .gitignore
Installing all JavaScript dependencies [4.0.7]
run yarn add @rails/webpacker from "."
yarn add v1.17.3
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.2.9: The platform "win32" is incompatible with this module.
info "fsevents@1.2.9" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning " > webpack-dev-server@3.8.2" has unmet peer dependency "webpack@^4.0.0".
warning "webpack-dev-server > webpack-dev-middleware@3.7.2" has unmet peer dependency "webpack@^4.0.0".
[4/4] Building fresh packages...
success Saved 1 new dependency.
info Direct dependencies
?? @rails/webpacker@4.0.7
info All dependencies
?? @rails/webpacker@4.0.7
Done in 4.48s.
Installing dev server for live reloading
run yarn add --dev webpack-dev-server from "."
yarn add v1.17.3
[1/4] Resolving packages...
[2/4] Fetching packages...
info fsevents@1.2.9: The platform "win32" is incompatible with this module.
info "fsevents@1.2.9" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
warning "webpack-dev-server > webpack-dev-middleware@3.7.2" has unmet peer dependency "webpack@^4.0.0".
warning " > webpack-dev-server@3.8.2" has unmet peer dependency "webpack@^4.0.0".
[4/4] Building fresh packages...
success Saved 1 new dependency.
info Direct dependencies
?? webpack-dev-server@3.8.2
info All dependencies
?? webpack-dev-server@3.8.2
Done in 4.92s.
Webpacker successfully installed ?
Webpacker::Manifest::MissingEntryError in Welcome#index
Showing C:/Users/[...]/site_test/app/views/layouts/application.html.erb where line #9 raised:
Webpacker can't find application in C:/Users/[...]/site_test/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:
{
}
Extracted source (around line #9):
7
8 <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
9 <%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
10 </head>
11 <body>
12
dan*_*eto 24
这个错误似乎是关键。
Your manifest contains:
{
}
尝试简单地yarn在您的项目目录中运行该命令。这应该会导致manifest.json创建一个文件 - 除其他外。
如果这不起作用，我在 github 上发现了这个问题，我正在逐字背诵以下可能对您有所帮助的命令。这将重置所有构建的资产和 node_modules。
rm -rf node_modules
rails assets:clobber
yarn
rails assets:precompile
查看该链接以获取更多信息。
ben*_*sop 11
我遇到此错误的时间比我愿意提及的时间还要长，直到我运行以下步骤：
首先，webpacker 在我的默认情况下被锁定为 4.0 版本Gemfile。我将其升级到5.0并运行bundle update。
然后：
rm -rf node_modules
rails assets:clobber
yarn
rails assets:precompile
预编译资产时出现新错误：
yarn install v1.22.4
[1/4] Resolving packages...
success Already up-to-date.
Done in 0.36s.
I, [2021-04-09T11:04:33.781374 #16062] INFO -- : Writing /app/public/assets/manifest-04024382391bb910584145d8113cf35ef376b55d125bb4516cebeb14ce788597.js
I, [2021-04-09T11:04:33.781915 #16062] INFO -- : Writing /app/public/assets/manifest-04024382391bb910584145d8113cf35ef376b55d125bb4516cebeb14ce788597.js.gz
Compiling...
Compilation failed:
[webpack-cli] Invalid configuration object. Webpack has been initialized using a configuration object that does not match the API schema.
所以我编辑config/webpack/environment.js文件来读取：
const { environment } = require('@rails/webpacker')
const customConfig = {
resolve: {
fallback: {
dgram: false,
fs: false,
net: false,
tls: false,
child_process: false
}
}
};
environment.config.delete('node.dgram')
environment.config.delete('node.fs')
environment.config.delete('node.net')
environment.config.delete('node.tls')
environment.config.delete('node.child_process')
environment.config.merge(customConfig);
module.exports = environment
只有这样才能javascript_load_tag加载。它可能并不适合所有人，但希望在相同情况下可以节省其他人的时间。
Son*_*yen 10
就像上面 Salman 的回答一样，命令
$ rails webpacker:install
或者
$ bundle exec rails webpacker:install
解决了这个问题。这对我来说很奇怪，因为 rails 不会自动安装 webpacker，但javascript_pack_tag无论如何都将其包含在默认布局中。但是，如果 yarn 抱怨您的节点版本，请确保安装正确的并切换到它，然后再次运行上述命令。这个简单的事情花了我一个小时才弄明白。例如：
$ nvm install 13.7
$ nvm use 13.7
$ rails webpacker:install
这是我为未来的 Rails 6.1+ 和 Ruby 2.7.1+ 用户提供的解决方案。
对我来说，发生这种情况是因为我的 webpacker gem 在Gemfile. 一旦我将其提升到 5.0 版本并运行bundle update，这个错误就消失了。看起来 webpacker 在运行时可能一直默默地失败并且从未创建该public/packs文件夹。将我的 Webpacker 更改Gemfile为最新版本为我解决了这个错误。
Gemfile 更改
DELETED gem 'webpacker', '~> 4.0.7'
ADDED gem 'webpacker', '~> 5.0'
感谢您的帮助。不幸的是没有任何效果。
rails assets:clobber删除node_modules文件夹后立即返回“错误无法找到完整性文件”。（在yarn install --check-files之后起作用）。
并rails assets:precompile 返回
"C:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/webpacker-4.0.7/lib/webpacker/webpack_runner.rb:23:in `exec': No such file or directory - C:\Users\[...]\site_test\node_modules\.bin/webpack (Errno::ENOENT)"
但我发现出了问题：我电脑中的位置！可能是名字问题...
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