You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: exchanges_controller.rb
    path of file: ./repos/sugar/app/controllers/concerns
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module ExchangesController
  extend Acti
    
  def respond_with_exchange(exchange, page)
    respond_to do |format|
      format.html
      format.json do
        redirect_to(polymorphic_path([exchange, :posts],
                                     page:, format: :json))
      end
    end
  end