NameError: uninitialized class variable @@classes in Mongoid::Search

[rgaufman]

When I try to index, I am seeing the following. Any ideas?

$ rake mongoid_search:index`
/usr/local/lib/ruby/gems/2.7.0/gems/mongoid-7.0.5/lib/mongoid.rb:104: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/usr/local/lib/ruby/gems/2.7.0/gems/activesupport-6.0.2.2/lib/active_support/core_ext/module/delegation.rb:171: warning: The called method `delegate' is defined here
/usr/local/lib/ruby/gems/2.7.0/gems/faraday-0.15.4/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/usr/local/lib/ruby/gems/2.7.0/gems/faraday-0.15.4/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/usr/local/lib/ruby/gems/2.7.0/gems/faraday-0.15.4/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/usr/local/lib/ruby/gems/2.7.0/gems/faraday-0.15.4/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/usr/local/lib/ruby/gems/2.7.0/gems/faraday-0.15.4/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/data/deployer/timeline/current/vendor/cache/will_paginate-66f3a4209ec5/lib/will_paginate/deprecation.rb:35: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/data/deployer/timeline/current/vendor/cache/will_paginate-66f3a4209ec5/lib/will_paginate/deprecation.rb:35: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/usr/local/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.2/lib/action_dispatch/middleware/stack.rb:37: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/usr/local/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.2/lib/action_dispatch/middleware/static.rb:110: warning: The called method `initialize' is defined here
rake aborted!
NameError: uninitialized class variable @@classes in Mongoid::Search
Did you mean?  class
               class

Tasks: TOP => mongoid_search:index
(See full trace by running task with --trace)

I tried both:

gem 'mongoid_search', github: 'mauriciozaffari/mongoid_search', branch: 'master'

and

gem 'mongoid_search', github: 'mongoid/mongoid_search' 

And the results are the same :(

[rgaufman]

As a workaround, I added this to make sure each model is "touched" which then allows running klass.index_keywords!:

    mongo_search_models = `find app/models -type f | while read line; do egrep -H "Mongoid::Search" "$line"; done`
    mongo_search_models.split("\n").each do |line|
      name = line.split(':')[0].split('/')[-1].split('.')[0].capitalize
      name.constantize
    end

    Mongoid::Search.classes.each do |klass|
      puts "Indexing Mongoid::Search model: #{klass}"
      klass.index_keywords!
    end

[yads]

Looks like you found this issue in the zeitwerk autoloader rails/rails#37006. @rgaufman can you confirm that running Zeitwerk::Loader.eager_load_all does not help in your case? If the workaround in the issue works I can add a check for zeitwerk and update the existing ::Rails::Application.eager_load! calls to use the zeitwerk one if zeitwerk is defined.