rails`require＆＃x27;：无法加载该文件 - 矩阵
在更新了Ruby 3.1.2和Rails 7.0.2.3之后，
在开始Rails应用程序时会出现以下错误：
`require': cannot load such file -- matrix (LoadError)
可能是可能的解决方案，谢谢。
after updating to ruby 3.1.2 and Rails 7.0.2.3
getting following error while starting rails application:
`require': cannot load such file -- matrix (LoadError)
what could be the possible solution, thanks in advance.
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在3.1版中，从Ruby的标准库中删除了矩阵。更多信息： https：/ /www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-relase/
使用Ruby 3.1，需要将Matrix明确添加到Gemfile中。您可以手动添加它或运行类似的内容：
将其添加到Gemfile之后，捆绑您的应用程序：
然后，您的应用程序应该继续像以前的Ruby版本一样行事。
Matrix was removed from Ruby's standard library in version 3.1. More info: https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released/
With Ruby 3.1, matrix needs to be explicitly added to the Gemfile. You can add it manually or run something like:
After it's added to the Gemfile, bundle your application:
Then your application should continue to behave like it did in previous Ruby versions.
同样， Ruby 3.1.2，Rails 7.0.4 在将
大虾添加到Gemfile之后。我不得不将gem'matrix'添加到gemfile，并且有效。same here, ruby 3.1.2, rails 7.0.4 after adding
prawnto gemfile. I had to addgem 'matrix'to gemfile and it works.当升级 rails 6--＆gt; 7 和 Ruby 3.0.0-3.1.2 时，我也介绍了这个问题。
就我的情况而言，问题与Capybara Gem有关。版本
3.35.3假定它默认使用Ruby安装。当我将Capybara升级到版本
3.37.1时，也会自动安装矩阵GEM，并解决了问题。I came onto this issue as well when upgrading Rails 6->7 and Ruby 3.0.0->3.1.2.
For my case the issue was related to Capybara gem. Version
3.35.3assumed it is installed by default with Ruby.When I upgraded the Capybara to version
3.37.1then matrix gem was automatically installed as well and the issue was resolved.在添加 RubyStats GEM中，也使用Ruby 3.1.2和Rails 7.0.4添加 RubyStats GEM，就遇到了同一问题。
@siasmj的修复程序对我有用。
Just ran into the same issue after adding rubystats gem for some seed data, also using ruby 3.1.2 and rails 7.0.4.
@siasmj 's fix worked for me.