rails simple_form_for association select text

I am using Rails 3.0, Ruby 1.9.2 and the Plataformatec simple_form gem.

The code below renders a select box with Consumer names. I want it to show a select box with Consumer locations instead. How do I do that?

View code:

<%= simple_form_for @request do |f| %>
  <%= f.association :consumer, :collection => Consumer.all, :prompt => "Ch开发者_如何学Coose a location" %>
  <%= f.button :submit %>
<% end %>

Model code:

Consumer < ActiveRecord::Base
  attr_accessor :name, :location
end

You would do this via label_method

<%= f.association :consumer, :collection => Consumer.all, :prompt => "Choose a location", :label_method=>:location %>