[Zope] Problem calling manage_addZClass from DTML

[Tres Seaver]

Sean McGrath <sean@digitome.com> wrote:

> I am getting a NameError exception calling manage_addZClass
> from DTML:
> 
>         Error Type: NameError
>         Error Value: manage_addZClass
> 
> My DTML looks like this:-
>         <dtml-call "manage_addZClass(REQUEST['ObjectName'])">
> 
> I am using Zope 2.1.6 on NT.

Unless you are attempting somthing like the "local products" hack discussed here
back in February (Products declared/scoped within "normal" Zope folders, rather
than the "magic" Control_Panel/Products folder), I can't think of any reason
you'd want to call "manage_addZClass" -- that method is designed to create the
actual class object for a ZClass, and should normally only happen inside
Control_Panel/Products.  Instances of a given ZClass are created via the factory
methods defined within the ZClass product.

Guessing that you have defined a ZClass (lets say, "Guiness", defined within a
Product called "HarpBrewery"), and want to instantiate it into a folder
("SeansMug").  The "factory methods" for the Guiness class are called
Guiness_addForm (HTML form, collects the "constructor parameters") and
Guiness_add (DTML method, extracts ctor parms from the REQUEST and creates the
object. In this case, you could do the following within a DTML method bound to
SeansMug (this assumes that the REQUEST object has previously been populated
with appropriate values)::

 <dtml-with "manage_addProduct[ 'HarpBrewery' ]"><!-- note square braces! -->
   <dtml-call "Guiness.createInObjectManager( REQUEST[ 'ObjectName' ]
                                            , REQUEST )">
 </dtml-with>

Hope that helps!

Tres.
-- 
=========================================================
Tres Seaver  tseaver@digicool.com   tseaver@palladion.com