Richard Wesley writes:
I need to create a form (using page templates) that does roughly this:
<BasicData>
<selectable list of homogenous objects to attach to BasicData>
<list of homogenous objects already attached to BasicData>
The problem is that I can't seem to make the attached list persistent. In my action script for attaching a new list object, I check the request to see if the list is present and append the selected object to the attached object list, but the script never seems to have access to the request passed to the form. Please read the "Web publishing" section of
<http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html> You will find that "REQUEST" is what the name suggests (oh wonder!): a description of a single, the current, request: no memory for earlier requests. When you need such a memory, you are looking for a session. Zope 2.5 comes with an integrated session product. It's very easy to use: SESSION.set(key,value) sets "key" to "value" in one request and SESSION[key] retrieves it in later requests. An alternative is to code the list in a sequence of hidden variables: <input type="hidden" name="myList:list" value="val1"> <input type="hidden" name="myList:list" value="val2"> .... Needless to say, that this is much more work... Dieter