Rails - Apr 2006 - Add extra data to objects in an instance variable?

I am building an issue log with models:

issues (belongs_to :user, has_many :comments)
comments (belongs_to :issues, belongs_to :user)
users (has_many :comments, has_many :issues)

In the list view for the issues I wanted to print the time it was last 
updated. This should come from the most recent comment added, or if 
there are no comments added we fall back to the creation time of the 
issue:

<% @last_update = Comment.find(:first, :order => ''added
desc'',
:conditions => ["issue_id = ?", issue.id]) %>

<% if @last_update %>
   <%= @last_update.added %>
<% else %>
   <%= issue.added %>
<% end %>


This all works fine, however I now want to order by this data in the 
paginator. I assume that I need to run though a loop adding some data to 
all the objects in the @issues = Issue.find_all instance variable in the 
list part of the issues controller, but how do I do this?

Best regards,

Chris






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