Compatibility Issue with langchainrb and Rails 6.1 / Ruby 3.0

[maulikknorket]

Hi team,
I'm trying to integrate langchainrb into my existing Rails app with the following stack:

ruby '3.0.0'
gem 'rails', '~> 6.1.7', '>= 6.1.7.7'

I primarily want to use Qdrant-related features, but I’m running into version constraints:

• langchainrb >= 0.10.2 requires Ruby >= 3.1.0
• langchainrb >= 0.9.4 requires activesupport >= 7.0.8, conflicting with Rails 6.1.x

Upgrading Ruby or Rails is not feasible right now due to the size and complexity of the app.

Ask:
Is there a version of langchainrb compatible with Ruby 3.0.0 and Rails 6.1.7.7, that still supports Qdrant?

Any workaround or suggestion would be much appreciated

[koic]

This is just a personal view as a contributor, Langchain.rb is a relatively new project that started development in 2023. On the other hand, Ruby 3.0 and Rails 6.1 had already reached EOL before that, so it’s reasonable to be skeptical about whether retroactively supporting them is justified, considering the increased maintenance cost it would entail.

• https://www.ruby-lang.org/en/downloads/branches
• https://rubyonrails.org/maintenance

The fundamental solution is likely to upgrade the Rails application. This is the best solution.
Alternatively, the repository could be forked and referenced directly in the application’s Gemfile as a workaround:

gem 'langchainrb', github: 'your_org/langchainrb', branch: 'backward_compatible_branch'

That said, relying on this workaround is not recommended. Because it becomes difficult to keep up with changes in the main branch after forking.