Bump Rails to v8 Investigation

[jefferya]

With the update from Rails 7.1 to 7.2 in PR #840 , the next step is Rails 8.0 and 8.1.

This issue if placeholder for the investigation.

[jefferya]

Let's test updating from Rails 7.2.x to 8.0.x

References:

• https://guides.rubyonrails.org/upgrading_ruby_on_rails.html
• https://calvin.my/posts/upgrade-rails-version-7-2-to-8-0
• https://reinteractive.com/articles/rails-7-to-8-upgrade-guide
• https://guides.rubyonrails.org/asset_pipeline.html

Process

• Edit Gemfile: gem 'rails', '~> 8.0'
• bundle update rails
• rails app:update
  • let's accept all changes

Note: Remove duplicate error pages introduced by rails app:update. For details, see f359b99. Keep the current approach: f359b99#r2478949613

Note: Add back to config/application.rb Rails.application.config.active_record.default_column_serializer = YAML as comfortable_mexican_sofa v3.5 https://github.com/restarone/comfortable-mexican-sofa.git is not updated for Rails 7.1 to specify serialization method. The commit with the details: 3f45e4f

At this point, the basic parts of the CMS load.

Things to verify more closely

• Closely consider the changes suggested by rails app:update
• bundle exec rails test
• bundle exec rubocop
• asset pipeline: Propshaft is the new default in Rails 8 replacing previous default Sprockets system. Verify that comfortable_mexican_sofa gem with its dependancy on sassc-rails sprockets is still viable given the asset pipeline change.
  • check bin/rails assets:precompile or bundle exec rake assets:precompile and JavaScript, CSS, and images are loaded as expected
  • cursory check results: ok
  • https://guides.rubyonrails.org/asset_pipeline.html
    • can we keep the current sprockets in Rails 8.0? Yes. Sprokets and Sssc continue to work.
    • The upcoming SASS Dart v2 removes features deprecated in Sass Dart v1 so a future change is needed
• check logs for deprecations
• 1.5. Configure Framework Defaults in config/initializers/new_framework_defaults_X_Y.rb
  • config/application.rb: config.load_defaults 8.0
  • DEPRECATION WARNING:to_timewill always preserve the full timezone rather than offset of the receiver in Rails 8.1. To opt in to the new behavior, setconfig.active_support.to_time_preserves_timezone = :zone. (called from <main> at /app/config/environment.rb:5)
• Discard any change that rupocop doesn't like, for examle, the removal of "# frozen_string_literal: true"