Nested fields_for

gistfile1.erb

_form.html.erb
<% form_for @estimate, :url => estimates_path do |f| %>
   <div id="estimate_items">
     <%= render :partial => "job_part", :collection => @estimate.job_parts %>
   </div>
   <%= add_job_part "Add Calendar" %>
         
   <p><%= f.submit "ADD CALENDAR TO ESTIMATE" %></p>
<% end %>

---

_job_part.html.erb
 <div class="item">
   <% fields_for "estimate[job_part_attributes][]", job_part do |jp| %>
     <div style="float: left">
       <p>
         <label>Calendar Type</label>
         <%= jp.select :product_id, Product.find_all_by_store_front_id(StoreFront.current).collect {|p| [p.name, p.id]} %>
       </p>
       <p>
         <label>Quantity</label>
         <%= jp.text_field :quantity %>
       </p>
     </div>
 
     <div style="float: left">
       <h3>Ship to Location</h3>
         <% jp.fields_for "address_attributes" do |a| %>
           <p>
             <label>Last Name</label>
             <%= a.text_field :last_name" %>
           </p>
           <p>
             <label>Address 1<label>
             <%= a.text_field :address_line_1 %>
           </p>
           <p>
             <label>Address 2</label>
             <%= a.text_field :address_line_2 %>
           </p>                                                                                                                                                      
           <p>                                                                                                                                                       
             <label>City</label>                                                                                                                                     
             <%= a.text_field :city %>                                                                                                                               
           <p>                                                                                                                                                       
             <label>State</label>                                                                                                                                    
             <%= a.text_field :state_province_region %>                                                                                                              
             <label>Zip</label>                                                                                                                                      
             <%= a.text_field :zip_postal_code %>                                                                                                                    
           </p>                                                                                                                                                      
           <p>                                                                                                                                                       
             <label>Country</label>                                                                                                                                  
             <%= a.text_field :country %>                                                                                                                            
           </p>                                                                                                                                                      
         <% end %>                                                                                                                                                
     </div>                                                                                                                                                          
     <%= link_to_function "Remove", "$(this).parents('.item').remove()" %>                                                                                           
   <% end %>                                                                                                                                                         
</div>

---

<form action="/estimates" class="new_estimate" id="new_estimate" method="post">
  <div id="estimate_items">
    <div class="item">
  
    <div style="float: left">
      <p>
        <label>Calendar Type</label>
        <select id="estimate_job_part_attributes__product_id" name="estimate[job_part_attributes][][product_id]"></select>
      </p>
      <p>
        <label>Quantity</label>
        <input id="estimate_job_part_attributes__quantity" name="estimate[job_part_attributes][][quantity]" size="30" type="text" />
      </p>
    </div>

    <div style="float: left">
      <h3>Ship to Location</h3>
        
          <p>
            <label>Last Name</label>
            <input id="estimate_job_part_attributes__address_attributes_last_name" name="estimate[job_part_attributes][][address_attributes][last_name]" size="30" type="text" />
          </p>
          <p>
            <label>Address 1<label>
            <input id="estimate_job_part_attributes__address_attributes_address_line_1" name="estimate[job_part_attributes][][address_attributes][address_line_1]" size="30" type="text" />
          </p>
          <p>
            <label>Address 2</label>
            <input id="estimate_job_part_attributes__address_attributes_address_line_2" name="estimate[job_part_attributes][][address_attributes][address_line_2]" size="30" type="text" />
          </p>
          <p>
            <label>City</label>
            <input id="estimate_job_part_attributes__address_attributes_city" name="estimate[job_part_attributes][][address_attributes][city]" size="30" type="text" />
          <p>
            <label>State</label>
            <input id="estimate_job_part_attributes__address_attributes_state_province_region" name="estimate[job_part_attributes][][address_attributes][state_province_region]" size="30" type="text" />
            <label>Zip</label>
            <input id="estimate_job_part_attributes__address_attributes_zip_postal_code" name="estimate[job_part_attributes][][address_attributes][zip_postal_code]" size="30" type="text" />
          </p>
          <p>
            <label>Country</label>
            <input id="estimate_job_part_attributes__address_attributes_country" name="estimate[job_part_attributes][][address_attributes][country]" size="30" type="text" />
          </p>
        
    </div>
    <a href="#" onclick="$(this).parents('.item').remove(); return false;">Remove</a>
  
</div>

  </div>

  <p><input id="estimate_submit" name="commit" type="submit" value="ADD CALENDAR TO ESTIMATE" /></p>
</form>

---

{"commit"=>"ADD CALENDAR TO ESTIMATE",
 "authenticity_token"=>"a9d039735e7a26e7b3fb1499dde7781fb8314518",
 "estimate"=>{"job_part_attributes"=>[{"product_id"=>"2039",
 "quantity"=>"123",
 "address_attributes"=>{}},
 {"address_attributes"=>{"address_line_1"=>"285 Settler Rd"}},
 {"address_attributes"=>{"address_line_2"=>""}},
 {"address_attributes"=>{"city"=>"DeKalb"}},
 {"address_attributes"=>{"state_province_region"=>"Illinois"}},
 {"address_attributes"=>{"zip_postal_code"=>"60115"}},
 {"address_attributes"=>{"country"=>"United States"}}]}}