Question

each User can only have one MedicalHistory so I have

class User < ActiveRecord::Base
    acts_as_authentic
end

class MedicalHistory < ActiveRecord::Base
    belongs_to :user
end

Using the above I can successfully create the user from the MedicalHistory model in the console:

newuser = Medicalhistory.new
newuser.user = User.new
newuser.user.username='testusername'
newuser.user.password='blahblah'
newuser.user.password_confirmation='blahblah'
newuser.user.save

MedicalHistory Side looks like following

#controller
def new
    @medicalhistory = MedicalHistory.new
    @medicalhistory.user = User.new
end

#form
<%=...%>
<%=f.intput :cell_phone%>
<%=f.fields_for :user do |builder|%>
  <%= render "registration_form", :f => builder %>
<% end %>

#Partial
<%=f.input :email%>
<%=f.input :password%>
<%=f.input :password_confirmation%>

Error

When submitting the form I am getting below error:

User(#-) expected, got ActiveSupport::HashWithIndifferentAccess(#)

Error is on following line:

#controller
def create
    @medicalhistory = Medicalhistory.new(session[:medicalhistory_params]) #gives error
    #somewhere here I should extract registration fields and register the user
end

Question
Is there a way I can avoid fields in the partial (registration fields) getting into the session[:medicalhistory_params]…is there a except or something?

Answer 1

change your model as follows:

class MedicalHistory < ActiveRecord::Base
  belongs_to :user
  accepts_nested_attributes_for :user
end

Ref here: http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html