Rails - Jul 2008 - Error message: ActionView::TemplateError (No :secret given t

Hi all

I am getting this error message on the log, and I do not unserstand it.

I am using rails 2.0.  Please advice



ActionView::TemplateError (No :secret given to the #protect_from_forgery
call.  Set that or use a session store capable of generating its own
keys (Cookie Session Store).) on line #8 of store/index.html.erb:
5:   <h3><%= h(product.title) %></h3>
6:   <%= product.description %>
7: <span class="price" ><%= number_to_currency(product.price)
%></span>
8:   <%= button_to "Add to cart", :action => :add_to_cart,
:id=> product
%>
9:   </div>
10:   <% end %>
11:
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