demarches-normaliennes/app/controllers/users/siret_controller.rb

class Users::SiretController < UsersController
  def index
    @procedure = Procedure.find(params['procedure_id'])
  rescue ActiveRecord::RecordNotFound
    error_procedure
  end

  def error_procedure
    render :file => "#{Rails.root}/public/404_procedure_not_found.html",  :status => 404
  end
end