运行rake assets:precompile以错误结束。找不到为什么它仍然需要sassc，当sassc使用从sprockets 3.x升级到4.x:的指南迁移到链轮4时，它只在项目中
gem 'sass-rails', '>= 5'
bundle update sass-rails sprockets
然后按照dartsassrails安装文档。完成：
rails tmp:clear
rake assets:clobber
rake assets:precompile
ruby-3.1.2
gem 'rails', '7.0.3.1'
gem 'webrick'
gem 'sprockets-rails', '~> 3.4', '>= 3.4.2'
gem 'dartsass-rails', '~> 0.4.0'
...
manifest.js文件内容：
//= link_tree ../images
//= link application.css
//= link application.js
//
//= link_tree ../builds
错误日志：
** Invoke assets:precompile (first_time)
** Invoke assets:environment (first_time)
** Execute assets:environment
** Invoke environment (first_time)
** Execute environment
** Invoke dartsass:build (first_time)
** Invoke environment
** Execute dartsass:build
+ /.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/dartsass-rails-0.4.0/exe/darwin/sass --style=compressed --no-source-map --load-path
/app/assets/stylesheets --load-path
/app/assets/builds --load-path
/app/assets/config --load-path
/app/assets/fonts --load-path
/app/assets/images --load-path
/app/assets/javascripts --load-path
/app/assets/stylesheets --load-path
/lib/assets/javascripts --load-path
/lib/assets/stylesheets --load-path
/vendor/assets/javascripts --load-path
/vendor/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bundler/gems/flex_calendar-aae0ac1c9b3f/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bundler/gems/flex_calendar-aae0ac1c9b3f/app/assets/images --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bundler/gems/flex_calendar-aae0ac1c9b3f/app/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bundler/gems/flex_calendar-aae0ac1c9b3f/lib/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/flatpickr-4.5.7.0/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/bundler/gems/flex_calendar-aae0ac1c9b3f/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/flatpickr-4.5.7.0/vendor/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/tinymce-rails-5.10.5/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/tinymce-rails-5.10.5/app/assets/source --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/tinymce-rails-5.10.5/vendor/assets/config --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-minicolors-rails-2.2.6.2/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/tinymce-rails-5.10.5/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-minicolors-rails-2.2.6.2/vendor/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/select2-rails-4.0.13/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/select2-rails-4.0.13/vendor/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-ui-rails-5.0.5/app/assets/images --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-ui-rails-5.0.5/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-ui-rails-5.0.5/app/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/jquery-rails-4.2.1/vendor/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/coffee-rails-5.0.0/lib/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/actiontext-7.0.3.1/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/actiontext-7.0.3.1/app/assets/stylesheets --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/actioncable-7.0.3.1/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/activestorage-7.0.3.1/app/assets/javascripts --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/actionview-7.0.3.1/lib/assets/compiled --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/react-rails-1.9.0/lib/assets/react-source/development --load-path
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/react-rails-1.9.0/lib/assets/javascripts/ --load-path
/app/assets/fonts
/app/assets/stylesheets/application.scss:
/app/assets/builds/application.css
** Execute assets:precompile
rake aborted!
LoadError: cannot load such file -- sassc
/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/zeitwerk-2.6.0/lib/zeitwerk/kernel.rb:35:in `require'
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Tasks: TOP => assets:precompile
操作系统：mac
当我安装依赖于sassc-rails的gem(例如pdfjs_viewer-rails(并用./bin/dev启动服务器时，web就会启动并正常工作。
问题：你知道这可能是什么原因吗？可能的解决方案是什么？
我通过运行rails tmp:clear并重新启动服务器来修复它；我的assets.rb文件中没有包含任何文件，当我运行时，这种情况也开始发生在我身上
$ rails importmap:install
$ rails turbo:install stimulus:install
发现问题：在样式表下，根文件夹是额外的example.scss文件，它被设置为使用预编译
Rails.application.config.assets.precompile += %w( example.css )
显示此错误是因为文件实际具有不同的扩展名。
解决方案：
- 从预编译中取出example.css
- 为dartsas添加了文件以使用以下方法处理它：
Rails.application.config.dartsass.builds = {
"application.scss" => "application.css",
"example.scss" => "example.css"
}
将better_errors-gem升级到2.10.0版本也会导致该错误，至少在Rails 7中是这样(请参阅https://github.com/BetterErrors/better_errors/issues/516)。
一个变通办法是通过类似的东西来阻止使用这个特定版本
gem 'better_errors', '!= 2.10.0'
我也遇到过这个问题。通过搜索cannot load such file -- sass访问了此线程。
我知道你在使用存储程序，但我在webpacker中遇到了这个错误。
在webpacker中，默认配置是不在开发环境中提取scs。您需要在config/webpacker.yml中打开此选项。
development:
<<: *default
compile: true
extract_css: true
我不知道为什么链轮会出现这种情况，但其他人可能也有和我一样的问题，希望这能帮助他们。
我在使用jsbundling和cssbundling(而不是importmaps(的Rails 7中遇到了这个问题。这是由一些名称冲突的文件引起的。我在assets文件夹中有自己的slimselect.css文件，但也从"slimselect"npm包中导入了slimselect-css。
重命名我自己的文件为我修复了它。
我想在这里提到它，因为上面的解决方案都不起作用，而且显然这个错误有很多不同的原因。
这里的许多答案都朝着完全不同的方向发展——在我看来，这很好地代表了Rails资产管道。
以下是对我有效的
在manifest.js中
//= link_tree ../stylesheets .css
样式表文件夹同时包含scs和css。取而代之的是，对scss文件使用link_tree，对css文件使用link。
//= link_tree ../stylesheets .scss
//= link other.css
//= link another.css