Unable to resolve constant BatchEnumerator

[billy1kaplan]

Describe the bug:

After running bundle exec rake rails_rbi:models, many files no longer typecheck with this error:

Unable to resolve constant BatchEnumerator
    ).returns(ActiveRecord::Batches::BatchEnumerator)

This is surprising to me because I see this definition in sorbet/rbi/gems/activerecord.rbi:3845:

class ActiveRecord::Batches::BatchEnumerator
  def delete_all; end
  def destroy_all; end
  def each; end
  def each_record; end
  def initialize(relation:, of: nil, start: nil, finish: nil); end
  def update_all(updates); end
  include Enumerable
end

Doing a bit of searching, I found this issue which describes a similar problem but seems to have been resolved: #355

I'm not sure if this is an issue specifically with sorbet-rails, sorbet, or (most likely) with my understanding of how this should work. Any help is much appreciated!

Steps to reproduce:

1. Run bundle exec rake rails_rbi:models
2. Run bundle exec srb tc

Expected behavior:
Expect to find this constant that sorbet-rails is using to generate type definitions.

Versions:

• Ruby: 2.7.2
• Rails: 6.1.4.1
• Sorbet: 0.5.9449
• Sorbet-Rails: 0.7.27

[billy1kaplan]

As a temporary workaround, can probably add this class to todo.rbi.