-----Original Message----- From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of Passin, Tom Sent: Friday, October 04, 2002 1:46 PM To: zope@zope.org Subject: RE: [Zope] dtml-if and checkboxes
[Meilicke, Scott]
<dtml-if check_box>
<dtml-if expr="check_box == ('on')"> The check box is checked! </dtml-if>
</dtml-if>
The above should work, but there may be a better way... Maybe something like <dtml-if "check_box and check_box == ('on')">, not sure though.
No, because if the checkbox is not checked then there will be no such variable in the REQUEST, so the if test will fail. This is how forms work, as Jim Penny just said. You have to check for the existence of the variable by name.
Cheers,
Tom P
Actually, this will work although it is wordy. <dtml-if somevar> is special and will evaluate to false if somevar is not defined. This is very different from <dtml-if "somevar"> which will throw and exception if somevar is not defined. Having said that, using has_key is a lot cleaner.