I have added an admin flag to my users model following the devise wiki here (the second option):
https://github.com/plataformatec/devise/wiki/How-To%3a-Add-an-Admin-role
but not in rails_admin the admin flag is disabled, isn’t it supposed to be a checkbox instead of a grey circle.
This is because
rails_adminautomatically disables this field for safety reasons. To re-enable it, you can set theconfig.attr_accessible_rolefield inconfig/initializers/rails_admin.rb, like this: