ruby on rails - Validation for nested attributes -

iam using nested forms in rails 3.2.8 when go in edit page when ever add nested attributes , make empty , submit form nested attributes not validated , not displaying message these how validates nested attributes in nested form

let consider code follow :

user model :

class user < activerecord::base     has_one :company         attr_accessible :first_name, :last_name        validates :first_name, :presence => true      validates :last_name, :presence => true      accepts_nested_attributes_for :company    end 

user model has 1 company , suppose want accept nested attributes users company.

comapny model :

class company < activerecord::base    belongs_to :user    attr_accessible :company_name, :address    validates :company_name, :presence => true    validates :address, :presence => true end 

comapny model has company_name , address. can accept company attributes user view , on user save check both validates i.e. user company. if validation fails, in user add following lines user view

<% if @user.errors.any? %>         <div id="error_explanation">           <div class="alert alert-error">             form contains <%= pluralize(@user.errors.count, "error") %>.           </div>           <ul>             <% @user.errors.full_messages.each |msg| %>                 <li><%= msg %></li>             <% end %>           </ul>         </div>     <% end %>