[Zope] NameSpace Question

[Kapil Thangavelu]

Luis Cortes wrote:
> 
> I need a name space expert to please answer the following question.  Why can't
> I access row_items in the following senario:
> 
> dtml document (index):
>         has an input form with records called row_items as inputs.
>         On submit it calls form2 ( post ).
> 
> dtml document "form2":
>         it uses row_items just fine.
>         it also has an input form and simply calls form3 (post) on submit.
> 
> dtml document "form3":
>         it cannot find row_items -- i don't understand why, I thought
> namespaces where stacked on top of each other, can someone help please.
> 
> Thanks ahead of time,
> Luis.

long answer:
This has more to do with how http works than zope. http(by itself) is a
stateless protocol between pages. Each page request is independent from
any other. When you submit a form  the client calls the new page with
those form variables. in your case form1 sets up some variables which
the client browser calls form2 with. in form2 you have access to those
variables within zope. if you don't send them in either a form or a
cookie than they won't be apparent to form3. namepaces in zope are
stacked on top each other in a single request what you have access to is
determined by acquisition & inheritance, for more info on acquisition
check out Jim F.'s talk form IPC8 on the zope home page.

short solution:
you basically want to add some hidden variables to your form2 like
<input type="hidden" value="<dtml-var row-items>" name="row-items>

Kapil
www.sin.wm.edu