Rails - Jun 2005 - More newbie questions: a many-to-many relationship

In order to avoid to bore the list with more trivial questions (like these 
two), can you please suggest some readings ?
I read about the upcoming book, which I will probably buy; is there anything 
else apart the "raw" documentation ?

Reading here and there I undestood that there must be a way to optimize a
piece of code like this:
        <% for duty in @duties %>
          <% for user in duty.users %>
            <tr>
              <td><%= user.name %></td>
            </tr>
          <% end %>
        <% end %>

This is the model:

class Duty < ActiveRecord::Base
  belongs_to :type
  has_and_belongs_to_many :users
end

class User < ActiveRecord::Base
  has_and_belongs_to_many :duties
end

Many thanks in advance.

Bruno

" which I will probably buy; is there anything
else apart the "raw" documentation ?"

I''ve always found the people at the IRC channel to be very helpful. 

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