osem-fcy/app/controllers/admin/supporter_levels_controller.rb

class Admin::SupporterLevelsController < ApplicationController
  before_filter :verify_organizer

  def show
    render :supporter_levels
  end

  def update
    begin
      @conference.update_attributes!(params[:conference])
      redirect_to(admin_conference_supporter_levels_path(conference_id: @conference.short_title), notice: 'Supporter levels were successfully updated.')
    rescue => e
      redirect_to(admin_conference_supporter_levels_path(conference_id: @conference.short_title), alert: "Supporter levels update failed: #{e.message}")
    end
  end
end