[Zope] sequence-item as a method argument

[Rik Hoekstra]

Hello again

I´m still testing the usability and reliability of Zope. To accomplish this
goal I am developing a very very simple shopping cart. But I got troubled by
something aparently simple. This is the code:

<dtml-in "SESSION['cartItems']">
  <dtml-in "sqlSearchProduct(productID=sequence-item)">
   <tr><td><dtml-var productName></td><td><dtml-var price></td></tr>
  </dtml-in>
</dtml-in>

SESSION['cartItems'] is an array created in another DTML document using the
well known SQLSession product. Here I am retrieving the itens of this array
and passing it to a ZSQL method to get the selected items.

The sqlSearchProduct, alone, works well. If I substitute the inner <dtml-in
"sql...> for a simple <dtml-var sequence-item> the block works fine,
otherwise it gives me the following error:

Zope has encountered an error while publishing this resource.

Error Type: NameError
Error Value: sequence



change the line
-  <dtml-in "sqlSearchProduct(productID=sequence-item)">
to
 + <dtml-in "sqlSearchProduct(productID=_['sequence-item'])">

in the line as it is now, sequence-item is interpreted as a Python
expression, meaning sequence minus item. The second incantation gets the
variables 'sequence-item' from the current namespace _

hth

Rik