ActiveAdmin Could not find a valid mapping for AdminUser error

1
votes

I'm following the instructions here: http://net.tutsplus.com/tutorials/ruby/create-beautiful-administration-interfaces-with-active-admin/

So in Step 2, I go to /app/models/admin_user.rb and append the following: after_create { |admin| admin.send_reset_password_instructions }

def password_required?
  new_record? ? false : super
end

So then I go to /admin/admin_users/new and I get the following error when I try to add a user

RuntimeError in Admin::AdminUsersController#create<br /> Could not find a valid mapping for #<AdminUser id:2, email:

1
ruby-on-railsrubyactiveadmin

1 Answers

2
votes

In your environments/development.rb ensure your classes are cached:

config.cache_classes = true

This is not ideal, but necessary in this instance due to a code reloading quirk in Rails, according to comments associated with the bug logged over at GitHub: https://github.com/gregbell/active_admin/issues/733