Example Real Controller

agents_controller.rb

class Admin::AgentsController < AdminController
  include ListParams
  include StatusFilter

  helper :filter

  let(:agents) { policy_scope authorize Agent.all }
  let(:agent) { authorize agents.with_stats.find_or_build params[:id] }

  def index
    self.agents = filter_by_status agents, list_params[:status]
    self.agents = agents.search list_params[:q], include_brokerage_name: policy(Brokerage).general? unless list_params[:q].blank?
    self.agents = agents.includes :brokerage if policy(Brokerage).modify?
    self.agents = agents.with_stats.order(:last_name, :first_name).page list_params[:page]
  end

  defs :new, :edit do
    render 'form'
  end

  def create
    agent.brokerage = current_brokerage unless policy(Brokerage).modify?
    update
  end

  def update
    if agent.update params[:agent]
      redirect_to edit_admin_agent_path(agent), notice: 'Successfully saved!'
    else
      render 'form'
    end
  end
end