first iteration

controller.rb

def create
  if CreateCampaignAccessCodeGroup.(@campaign)
    redirect_to campaign_access_code_groups_path, notice: _("Group and codes were successfully created.")
  else
    render :new
  end
end

interactors.rb

class CreateCampaignAccessCodeGroup
  
  class << self
    def call(campaign)
      new(campaign).call
    end
  end

  def initialize(campaign)
    @campaign          = campaign
    @access_code_group = create_group(campaign)
  end

  def call
    @access_code_group.save && create_access_groups
  end

  private

  def create_group(campaign)
    # ....
  end

  def create_access_groups
    @access_code_group.count.times(&method(:create_access_group))
  end

  def create_access_group
    begin
      CampaignAccessCode.create(
        campaign: @campaign,
        campaign_access_code_group: @access_code_group,
        code: CampaignAccessCode.generate(@access_code_group.initials)
      )
    rescue ActiveRecord::RecordInvalid => e
      puts e
    end
    true
  end