what order for rails require gems?

Question

For my project, I use Rubocop to check the code style, the Rubocop require gems should be alphabetically sorted within groups. But when I changed the order, the CI failed, the error as below:

bundle exec rake assets:precompile rake aborted! NameError: uninitialized constant Kaminari::Helpers::Paginator

I have to put the kaminari-mongoid and kaminari-actionview after mongoid , then the CI will pass:

gem 'mongoid', '~> 5.1.5'
gem 'kaminari-mongoid', '~> 1.0.1'  # rubocop:disable Bundler/OrderedGems
gem 'kaminari-actionview', '~> 1.0.1' # rubocop:disable Bundler/OrderedGems

Rails how to decide the required order?

Answer 1

You can use empty lines and/or comments to group the gems, and RuboCop won't bug you about it:

gem 'mongoid', '~> 5.1.5'

# Needs to come after mongoid
gem 'kaminari-mongoid', '~> 1.0.1'

# Needs to come after kaminari-mongoid
gem 'kaminari-actionview', '~> 1.0.1'