ruby on rails - How to show specific parameters based on auth using pundit? -

say have user model has username , full_name. want render user object using active model serializer , render specific parameters based on if current_user nil or logged in. since i'm using pundit well, wondering if there way using pundit.

e.g.

user nil

{id:1, username: 'foo'} 

user logged in

{id:1, username: 'foo', full_name: 'bar'} 

why not check if current_user nil in user serializer. not sure version on can 0.9 version

class userserializer < activemodel::serializer   attributes :id, :username, :full_name    def filter(keys)     if scope.blank? #current_user not logged in       keys - [:full_name]     else       keys     end   end end