Nested attributes example 1

nested_attributes(1).rb

# /app/models/user.rb
class User < ActiveRecord::Base
  has_one :account_setting, :dependent => :destroy
end


# /app/controllers/users_controller.rb
class UsersController < ApplicationController
  def create
    @user = User.new(params[:user])
    @account_setting = AccountSetting.new(params[:account_setting])
    if @user.save
      @account_setting.user = @user
      @account_setting.save
      redirect_to(@user, :notice => 'User was successfully created.')
    else
      render :action => "new"
    end
  end 
end


# /app/views/users/edit.html.erb
<%= fields_for :account_setting do |a| %>
   <div class="field">
     <%= a.label :public_email %><br />
     <%= a.check_box :public_email %>
   </div>
   <div class="field">
     <%= a.label :show_media %><br />
     <%= a.check_box :show_media %>
   </div>
   <div class="field">
     <%= a.label :protect_posts %><br />
     <%= a.check_box :protect_posts %>
   </div>
<% end %>