title: Disable ActiveRecord for Rails 4
body: <p>I want to disable ActiveRecord in Rails 4. I did the following in <code>config/application.rb</code></p>
  
  <pre><code>require File.expand_path('../boot', __FILE__)
  
  # require 'rails/all'  -- commented
  
  require "action_controller/railtie"
  require "action_mailer/railtie"
  #require "active_resource/railtie" no need
  #require "rails/test_unit/railtie" no need
  #require "sprockets/railtie" no need
  
  # Require the gems listed in Gemfile, including any gems
  # you've limited to :test, :development, or :production.
  Bundler.require(:default, Rails.env)
  
  module MyApp
    class Application &lt; Rails::Application
       config.app_middleware.delete "ActiveRecord::ConnectionAdapters::ConnectionManagement"
    end
  end
  </code></pre>
  
  <p>By I have an error of  </p>
  
  <pre><code>/home/alex/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configuration.rb:95:in 
    method_missing: undefined method active_record for #&lt;Rails::Application::Configuration:0x00000002005c38&gt; (NoMethodError)
  </code></pre>