[Borges-users] more on auto-refresh

[Слепнев Владимир]

Borges rules =))

It seems that frames/iframes are Bad Things, because a) we have to use 
JavaScript to refresh which we didn't have to, b) we need to 
encapsulate session-specific data explicitly and c) frames screw up 
navigation.

After I added the cache-control:no-cache HTTP header to Borges output, 
the shopping cart in sushiNet started working OK with the back button. 
But another UI flaw emerged: to back out of a store item after 
purchasing it, we have to hit back twice. I edited StoreItemView.rb a 
little to fix that, and I really like the feel of the new version.

Also, I made a small survey =) I asked two people whether the back 
button should erase items from the shopping cart. One said "sure, 
yes", and the other said "sure, no". I'm more with the "sure, no" 
approach =)

Here's my StoreItemView:

class SushiNet::StoreItemView < Borges::Component

   attr_accessor :item

   def add_to_cart(n)
     n.times {session.add_to_cart(@item)}
   end

   def initialize(item)
     @item = item
   end

   def render_content_on(r)
     r.heading(@item.title)
     r.heading_level(@item.subtitle, 3)
     r.paragraph(@item.description)
     r.div do
       r.italic(@item.price.to_cents)
       r.space

       r.form do
         quantity = 0
         r.text_input('1') {|q| quantity = q}
         r.submit_button('Add to Cart') do 
           add_to_cart(quantity.to_i)
           answer
         end
       end
     end
   end

end

Vladimir Slepnev