Create Excel file in Ruby on Rails with Axlsx

I try to create Excel files with the gem "axlsx". But i work for the first time with this gem and i try one Test.

I make one link_to to an controller action. There is no Error, but i didnt find a complete excel file.

Link_to :

<%= link_to "Test", { :controller => :orders, :action => :invoices_generate }, { class: "btn btn-primary btn-lg", style: "width: 100%;", format: 'xlsx'} %>

My Controller :

def invoices_generate      
  respond_to do |format|
    format.xlsx
  end 
end

invoices_generate.xlsx.axlsx :

if examples.include? :basic
  wb.add_worksheet(:name => "Basic Worksheet") do |sheet|
    sheet.add_row ["First Column", "Second", "Third"]
    sheet.add_row [1, 2, 3]
    sheet.add_row ['     preserving whitespace']
  end
end

Copyright Notice：Content Author:「Drextor」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/37522759/create-excel-file-in-ruby-on-rails-with-axlsx