Enable ActiveRecord Mng

config/application.rb

@@ -33,6 +33,8 @@ module CodeOcean
     case (RUBY_ENGINE)
       when 'ruby'
         # ...
+        #this is enabled in prod for testing
+        config.middleware.use ActiveRecord::ConnectionAdapters::ConnectionManagement
       when 'jruby'
         # plattform specific
         java.lang.Class.for_name('javax.crypto.JceSecurity').get_declared_field('isRestricted').tap{|f| f.accessible = true; f.set nil, false}