[Zope] Getting calling folder data into a ZClass addForm

[Tres Seaver]

complaw@hal-pc.org wrote:

> Is there any way for the addForm DTML Method for a ZClass to know what folder it
> was called from so that some DTML logic can be implemented to load certain data
> (for properties) into the input elements of the HTML form used to load the
> initial data into the soon-to-be created object instance?
> 
> Is the context object available in the standard ZClass addForm?
> 
> I want to make a generalized ZClass that references other class instances that
> exist within the calling folder (and no where else).  The references,
> preferrably, would be stored in a list property of the object.  
> 
> The alternative is to make ZClasses for each specific folder (with boolean
> properties relating indicating relationship with the other object(s) in the
> folder).  I would like to avoid the alternative because it is more maintenance.
> 
> Does anyone use a mechanism for maintaining relationships between some (but not
> all) objects in a folder in some object for dynamic referencing?
> 
> When you think about it, there is a lot of utility if someone can work out this
> trick.
> 
> Thanks in advance,


Hi, Ron,

The DTML factory form is called in the context of a "factory dispatcher",
atop the "product dispatcher, atop the folder.  You can get to the
real folder with PARENTS[1], e.g.::

   <h3> Siblings: </h3>
   <dtml-with expr="PARENTS[1]">
   <dtml-in objectIds>
   <dtml-if sequence-start>
    <ul>
   </dtml-if>
     <li> <a href="&dtml-sequence-item;">&dtml-sequence-item;</a> </li>
   <dtml-if sequence-end>
    </ul>
   </dtml-if>
   </dtml-in>
   </dtml-with>

Hope that helps.

Tres.
--
===============================================================
Tres Seaver                                tseaver@digicool.com
Digital Creations     "Zope Dealers"       http://www.zope.org