polymorphic help

With the help of some devs. I was able to list down commends of a specific deal using the "def comments" method in the deal model class.

However, what I also need is to display the owner/user who made the comment via the @deal.comments loop. For example, something like this would be ideal:

<% @deal.comments.each do |comment| %>   <%=h comment.comment %>   <%=h comment.user.first_name %> <% end %>

Here is my actual code so far. I believe the key is to edit the "def comments" method in the deal model class to include the user model or something like that. Any help is appreciated...