Rails - Oct 2010 - 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.new(doc_attr)
  	doctor.save!
  	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 !!!

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Ok got this working. :)

On Oct 7, 3:57 pm, Dean
<deansam2...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> 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.new(doc_attr)
>         doctor.save!
>         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 !!!
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