app/controllers/parents_controller.rb

parents_controller.rb

class ParentsController < ApplicationController
  def new
   @parent = User.new
   2.times {@parent.kids.build} 
   # This creates a new, empty Parent instance and two empty kid instances belonging to the Parent.
  end
 
 def create
  @parent = Parent.create(parent_params)
   if @parent.save
    redirect_to parent_path(@parent) # Only if you already have a parents/show
   else
    render ‘new’
   end
 end
 
 private
  def parent_params
    params.require(:parent).permit(:any_parent_attributes_go_here kids_attributes: [:id, :name, :_destroy]) # This permits the kids params to be saved
  end
end