level_1.x_repository.rb

module InterestRepository
  def my_index
    InterestCollection.new(InterestRecord.includes(:account).order(percentage: :desc).all)
  end
end

class InterestCollection < Array
  def initialize(record_array)
    inital_array = record_array.map do |interest_data|
      Interest.new(interest_data.attributes_with_associations)
    end
    super(initial_array)
  end
  
  def my_custom_collection_method
    ...
  end
end