class Calendar
  include Mongoid::Document

  embeds_many :date_ranges, class_name: 'DateRange', store_as: :drs, cascade_callbacks: true
end

class DateRange
  include Mongoid::Document

  field :ed, as: :end_date, type: Date

  embedded_in :calendar, class_name: 'Calendar'
end

Calendar.where('date_ranges.end_date' => Date.parse('2022-01-01'))

# EXPECTED
Mongoid::Criteria
  selector: {"drs.ed"=>2022-01-01}

# ACTUAL (broken -- unaliased)
Mongoid::Criteria
  selector: {"date_ranges.end_date"=>2022-01-01}

MyNamespace::Calendar.pluck('date_ranges.end_date') #=> works
MyNamespace::Calendar.distinct('date_ranges.end_date') #=> works