Nested forms

Hi I am new to rails I am trying to use nested forms. I have a separate model for name and profile. The profile table has Date_of_Birth and Gender columns and the name table has first_name, middle_name and last_name.I have to take the inputs for the 2 table from the same form but it is showing an error. The code is as follow:-a) Profiles Controllerclass ProfilesController < ApplicationControllerlayout 'admin'    def new        @profile = DoctorProfile.new    end        def create        @profile = DoctorProfile.new(params[:doctor_profile])        if @profile.save            flash[:notice] = 'Profile Created Successfully'            redirect_to(@profile)        else            render('new')        end    end        endb) Profiles view (New)<div class=