Thomas B. Passin wrote:
[Jim Washington]
I would set it to a zero-length string. Zope handles the following OK on my machine.
<a href="<dtml-var URL0>?sort_order_asc=1">ascending</a> <a href="<dtml-var URL0>?sort_order_asc=">descending</a>
Better to have it be ...sort_order_asc=0 so that you can be sure that the property exists. You can still test it easily using dtml-if. Otherwise the test may fail because the property does not exist.
I thought that too, then tested it. ...sort_order_asc=0 returns a string, '0', which tests true. The dtml we were working with just tested existence or truth, <dtml-if sort_order_asc>, so sending an empty string in this case works better, unless one really wants to go through the trouble of checking for existence, then doing an _.int on it or running it through <dtml-try>. Unless, of course, it is invalid HTML, which I haven't checked. :) -- Jim Washington