subscribe_mentor.rb

class MentorProfile < ActiveRecord::Base
  # ... omitted
  
  def enable_searchability
    # called ONLY from a consent waiver model being saved and
    # when a background check model is saved
    update_attributes(searchable: can_enable_searchable?)

    if can_enable_searchable?
      RegistrationMailer.welcome_mentor(account).deliver_later
      SubscribeEmailListJob.perform_later(
        account.email,
        account.full_name,
        "MENTOR_LIST_ID",
        [{ Key: 'City', Value: city },
         { Key: 'State/Province', Value: state_province },
         { Key: 'Country', Value: Country[country].name }]
      )
    end
  end
  
  # ... omitted

  private
  def can_enable_searchable?
    # the consent waiver model and the background check models must exist!
    # this method returns false for those 2,000 subscribes, they're
    # not even registered in the database to the current Season model
    # (which happens when an existing user logs in again after a certain date
    consent_signed? and background_check_complete?
  end
  
  # ... omitted
end

subscribe_user_job.rb

class SubscribeEmailListJob < ActiveJob::Base
  queue_as :default

  def perform(email, name, list_env_key, custom_fields = [])
    return if Rails.env.development? or Rails.env.test?

    auth = { api_key: ENV.fetch('CAMPAIGN_MONITOR_API_KEY') }

    begin
      CreateSend::Subscriber.add(auth, ENV.fetch(list_env_key), email, name, custom_fields, true)
    rescue CreateSend::BadRequest => br
      p "Error: #{br}"
    end
  end
end