Rails 4 Nested Form with One to One Relationship - ruby-on-rails-4

Question

I have two models with a one to one relationship, User and Author.
I have two issues: the author instance isn't saving, and user.name isn't saving (although other attributes are). I think it is a permission error because the logs say:
Unpermitted parameters: name, authors
I was trying to follow this: How to save form data to different models with one-to-one relationship in rails 3?
User.rb
has_one :author
accepts_nested_attributes_for :author
Author.rb
belongs_to :user
authors#new
<%= simple_form_for #user do |f| %>
<%= f.input :name %>
<%= f.input :email %>
<%= f.input :password %>
<%= f.input :password_confirmation %>
<%= f.simple_fields_for :author do |author_form| %>
<%= author_form.input :bio %>
<% end %>
<%= f.submit %>
<% end %>
Users_Controller
def user_params
params.require(:user).permit(:name, :email, :image,
author_attributes: [:id, :bio,])
end

Answer 1

User controller should look like this:-
def new
#user = User.new
#user.build_author
end
def create
#user = User.new(user_params)
if #user.save
redirect_to success_path
else
render :new
end
end
private
def user_params
params.require(:user).permit(:name, :email, :password, :password_confirmation, author_attributes: [:id, :bio])
end
Users#new
<%= simple_form_for #user do |f| %>
<%= f.input :name %>
<%= f.input :email %>
<%= f.input :password %>
<%= f.input :password_confirmation %>
<%= f.simple_fields_for :author do |author_form| %>
<%= author_form.input :bio %>
<% end %>
<%= f.submit %>
<% end %>

Answer 2

I'm using the Devise gem and found the solution to be adding this code to the Application Controller:
before_action :configure_permitted_parameters, if: :devise_controller?
def configure_permitted_parameters
devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:name, :email, :password, author_attributes: [:id, :bio]) }
end