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Rails Nested Forms with belongs_to

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Easy way to add belongs_to association to nested forms in Rails

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  1. # user.rb
  2.  
  3. class User < ActiveRecord::Base
  4.   belongs_to :address
  5.   accepts_nested_attributes_for :address # can't have allow_destroy
  6. end
  7.  
  8. # users_controller.rb
  9.  
  10. class UsersController < ApplicationController
  11.   resource_controller
  12.   before_filter :load_object, :except => :index
  13.  
  14.   # called at the beginning of each action
  15.   def load_object
  16.     @user = User.find(...)
  17.     @user.address ||= Address.new()
  18.     @user
  19.   end
  20. end
  21.  
  22. # users/edit.html.erb
  23.  
  24. <% form_for(@user, :url => collection_url) do |f| %>
  25.   <%= render :partial => "form", :locals => { :f => f } %>
  26.   <p>
  27.     <%= submit_tag t("create"), {"class" => "wymupdate"}%>
  28.   </p>
  29. <% end %>
  30.  
  31. # users/_form.html.erb
  32.  
  33. <table class="admin-report" width="545">
  34. 	<fieldset id='name'>
  35. 	    <div class="inner">
  36. 	      <p class="field">&nbsp;</p>
  37. 	      <p id="aname" class="field">
  38. 	        <%= f.label :name, t(:name) %><br />
  39. 	        <%= f.text_field :name, :class => 'required' -%><span class="req">*</span>
  40. 	      </p>
  41. 		</div>
  42. 	</fieldset>
  43. 	<%= render :partial => "address_form", :locals => { :f => f } %>
  44. </table>
  45.  
  46. # users/_address_form.html.erb
  47.  
  48. <fieldset id='address'>
  49.   <% f.fields_for :address do |address_form| %>
  50.     <legend><%= t("address")%></legend>
  51.     <div class="inner">
  52.       <p class="field">&nbsp;</p>
  53.       <p id="afname" class="field">
  54.         <%= address_form.label :firstname, t(:first_name) %><br />
  55.         <%= address_form.text_field :firstname, :class => 'required' -%><span class="req">*</span>
  56.       </p>
  57.     </div>
  58.   <% end %>
  59. </fieldset>

URL: rails-accepts-nested-attributes-for-belongs-to

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