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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4 Answers
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:
$ bundle add matrix
After it's added to the Gemfile, bundle your application:
$ bundle install
Then your application should continue to behave like it did in previous Ruby versions.
2 Comments
Fernando Kosh
Solution for downgrading combine_pdf from 1.0.22 to 1.0.20. github.com/boazsegev/combine_pdf/issues/205
Anne Lalsingh
I had the same problem with file statistics. The commands above, with the word statistics instead of matrix solved the problem. Hope this helps.
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 3.35.3 assumed it is installed by default with Ruby.
When I upgraded the Capybara to version 3.37.1 then matrix gem was automatically installed as well and the issue was resolved.
Comments
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.
