Nested attributes example 2

nested_attributes(2).rb

# /app/models/user.rb
class User < ActiveRecord::Base
  has_one :account_setting, :dependent => :destroy
  accepts_nested_attributes_for :account_setting
end
 
 
# /app/controllers/users_controller.rb
class UsersController < ApplicationController
  def new
    @user = User.new(:account_setting => AccountSetting.new) 
  end
  
  def create
    @user = User.new(params[:user])
    if @user.save
      redirect_to(@user, :notice => 'User was successfully created.')
    else
      render :action => "new"
    end
  end 
end
 
 
# /app/views/users/edit.html.erb
<%= form_for(@user) do |f| %>
  # ...
  <%= f.fields_for :account_setting do |a| %>