Question on polymorphic association

I have 3 models . Doctor, Patient and User with following associations

class Doctor < ActiveRecord::Base   has_many :patients, :dependent => :destroy   has_one :user, :as => :userable   accepts_nested_attributes_for :user end

class Patient < ActiveRecord::Base   belongs_to :doctor   has_one :user, :as => :userable   accepts_nested_attributes_for :user end

class User < ActiveRecord::Base   belongs_to :userable, :polymorphic => true end

I have a nested form for doctor and user as OUTER FORM for :doctor   INNER FORM for :user   end end

and in my users controller i have a create action as

  def create     doc_attr = params[:doctor]     user_attr = doc_attr.delete(:user)     doctor =!     doctor.user.create(user_attr) ### getting error on this         ....................   end

When i submit the form i get the error saying undefined method create for nil:NilClass I know this is relatively simple. Any help will be greatly appreciated. Thanks in advance !!!

Ok got this working. :slight_smile: