Example using UsersQuery

send_emails_notifications.rake

task send_emails_notifications: :environment do
  def send_email_to_users_without_recent_visits
    users_without_recent_views = UsersQuery.new.without_recent_views

    UsersQuery.new(users_without_recent_views).subscribed.find_each do |user|
      SendNewProductsRecommendationsJob.perform_later(user)
    end
  end

  def send_similar_purchases_emails_to_users
    UsersQuery.new.for_notifications_of_similar_purchases.find_each do |user|
      SendSimilarPurchasesRecomendationsJob.perform_later(user)
    end
  end
end