I on the Show of "Contacts" and want, from that page, to submit a Comment that is related to the Contact.

The way I understand to do it would be:

<%= start_form_tag :action => "add_comment", :id => @contact %>
  <% text_area "comment, "body", "rows" = > 5 %> <br>
  <%= submit_tag %>
<%= end_form_tag %>

I would create a method in the Contacts controller:

def add_comment
  Contact.find(params[:id]).comments.create(params[:comment])
end

However, I feel there's a better way, but don't know what that is? I learned this on a pretty outdated book.

Basically, I want to add a new object belonging to a Model while on the Show of a different Model.

Would formtastic help me, and if so, how?