title: Disable ActiveRecord in Ruby on Rails 5
body: <p>I am a newbie in Rails.</p>
  
  <p>I want to disable ActiveRecord in Rails 5.</p>
  
  <p>I've already found several answers 
  <a href="https://stackoverflow.com/questions/28319002/how-do-i-remove-activerecord-from-an-existing-rails-4-application">Here</a>, <a href="https://stackoverflow.com/questions/821251/how-to-configure-ruby-on-rails-with-no-database">Here</a> and <a href="https://stackoverflow.com/questions/19078044/disable-activerecord-for-rails-4">Here</a></p>
  
  <p>But none of them seems working for me.</p>
  
  <p>Would you help me with this issue, please?</p>
  
  <p>Thanks.</p>