gistfile1.rb

class Invoice < ActiveRecord::Base
  belongs_to :user
  has_many :invoice_lines
  
  belongs_to :shipping_address, :polymorphic => true
  belongs_to :billing_address, :polymorphic => true
  
  
  UNPAID = 1
  PAID = 2
  
  STATUS_HASH = { UNPAID     => 'Unpaid',
                  PAID       => 'Paid'}


  def self.status_to_human(status)
    return STATUS_HASH[status]
  end
  
  def self.status_hash_for_select
    hash = []
    STATUS_HASH.each do |key,value|
      hash << [value, key]
    end 
    return hash

  end
  
  def status_human
    return Invoice::status_to_human(status_constant)
  end

end


# But here the status _shown_ in the pulldown is always 1
# The status _submitted_ via the pulldown is always correct

<h2>Edit Invoice</h2>

<h4>Shipping address</h4>

<%= simple_format @invoice.shipping_address.block_summary %>

<h4>Billing address</h4>

<%= simple_format @invoice.billing_address.block_summary %>


<h4>Items invoiced</h4>

<%= render :partial => 'invoice_table', :object => @invoice %>

<% debugger %>
<% form_for [:admin, @invoice] do |f| %>
<table>
  <tr>
    <td>Status</td>
    <td><%= f.select :status_constant, options_for_select(Invoice::status_hash_for_select) %></td>
  </tr>
</table>

<%= f.submit "Submit" %>

<% end %>