elasticsearch-model only loads the corresponding extensions if the kaminari or will_paginate has already been loaded when it is loaded.

In a typical Rails application, gems are usually loaded with Bundler.require in config/application.rb, which means that unless those gems are listed in the Gemfile before elasticsearch-model, it won’t work as intended.

The fact that behavior changes depending on the order of gems makes it very confusing and prone to misunderstandings. I think it would be much better to improve it by using mechanisms like ActiveSupport.on_load hooks so that it no longer depends on the load order.

For example, the Bundler/OrderedGems rule from rubocop-rails, commonly used in Rails development, enforces sorting gems alphabetically in the Gemfile. Following this, elasticsearch-model would appear before kaminari or will_paginate, making this issue a frequent occurrence.

• https://docs.rubocop.org/rubocop/cops_bundler.html#bundlerorderedgems