Ruby - Nesting objects through input values - ruby

Question

Hello my fellow companion!
What I'm trying to achieve is a system by which an Order form is compiled in two ways:
by fullfilling its own attributes (:sender_name, :sender_mobile etc..)
by selecting products through the price labels attached on them.
After a while of poking here and there, I managed to display the product list on the order form. Here the 3 models and the views
models/order.rb
class Order < ActiveRecord::Base
attr_accessible :sender_comment, :sender_email, :sender_mobile, :sender_name, :order_attributes
has_many :products
accepts_nested_attributes_for :products
end
models/product.rb
class Product < ActiveRecord::Base
belongs_to :order
attr_accessible :product_name, :product_description, :prices_attributes, :order_id
has_many :prices
accepts_nested_attributes_for :prices
end
models/price.rb
class Price < ActiveRecord::Base
belongs_to :product
attr_accessible :product_id, :price_label, :price_amount, :price_checked, :how_many_prices, :products_attributes
end
views/orders/_form.html.erb
<%= form_for(#order) do |f| %>
<div class="field">
<%= f.label :sender_name %><br />
<%= f.text_field :sender_name %>
</div>
# [...] other order's fields...
<%= f.fields_for :product do |builder| %>
<%= render "products_field", :f => builder %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
views/orders/_products.html.erb
<% #products.each do |p| %>
<td><%= p.product_name %></td>
<td><%= p.product_description %></td><br />
<% p.prices.each do |price| %>
<td><%= price.price_label %></td><br />
<td><%= price.price_amount %></td><br />
<td><input type="radio" class="order_bool" name="<%= p.product_name %>" <% if price.price_checked == true; puts "SELECTED"; end %> value="<%= price.price_amount%>"/></td><br />
<% end %>
<% end %>
Products and relatives prices are printed in the Order form, yet once selected they're not saved as order_attributes; along with the order's attributes, every radio selected generates an object like this
[#<Product id: nil, order_id: 23, product_name: nil, product_description: nil, created_at: nil, updated_at: nil>]
How can I convert the selected products into effective order_attributes?
This is my first project with OOP and that I'm learning all by myself, with a very few help but from the internet. Please don't be too harsh!
Also feel free to change the title if you don't consider it appropriate enough; english is not my native language and i find very difficult to recap this issue in just a few words.
Thanks for the patient :)

Answer 1

Basically your current _products_fields partial isn't even attached to the form object. You're building arbitrary inputs right now. See form_for documentation and fields_for documentation and radio_button documentation.
Note: When you use f.method_name you're actually going to call the FormBuilder versions of the method and not the FormHelper versions. Since the FormHelper version has more and still relevant documentation that's the better version. Just omit the object_name parameter.
I think changing a these lines should do the trick:
Form Partial:
<%= f.fields_for :products, #products do |builder| %>
<%= render "products_field", :f => builder %>
<% end %>
Products Fields Partial
# 'f' is the variable passed in using ':f => builder'
# So 'f' = builder
# f.object is accessing the object were building the fields for
<td><%= f.object.product_name %></td>
<td><%= f.object.product_description %></td><br />
<% f.object.prices.each do |price| %>
<td><%= price.price_label %></td><br />
<td><%= price.price_amount %></td><br />
<td><%= f.radio_box("price", price.price_amount %></td><br />
<% end %>