RE: [Zope] creating instances of products "programmatically"

22 Feb 2002

      ...
Hi,
I've got a Product question that I just haven't been able to answer
using the documentation I can find.
I've developed a Product called RDJM_JobImpl following the general
procedure in the Developers Guide.  The product class is defined so:
class RDJM_JobImpl(Implicit,Persistent,RoleManager,ObjectManager)
I've got enough stuff working so that I can add the product from the
manage screen and the guts of the product itself work swimmingly.
What I'd really like to be able to do is create instances of this
class
programmatically (either through scripts or DTML methods or whatever)
instead of through the management interface.
This I cannot figure out how to do.  Pointers to the appropriate
documentation would be greatly appreciated.
###################################################################
well, i have:
############################################# File JumpTabs/Tabs.py
class Tabs(SimpleItem.SimpleItem):
#.... many lines omitted
#-----------------------------------------------------------
# product instantiation
############################################# File JumpTabs/Tabs.py
manage_addTabsForm = DTMLFile('manage_addTabsForm', globals())
 # init instance Tabs(id, title) via webform
def manage_addTabs(dispatcher, id, title=default_title, render=0,
REQUEST=None):
 """Folder add(Tabs)"""
 tabs = Tabs(id, title)
 dispatcher.Destination()._setObject(id, tabs) # add tabs to destination
folder

 if render:
  tabs = dispatcher.Destination()._getOb(id) # in render absolute_url
needs this

  dtml_text = tabs.render_show_dtml()
  dtml_name = id+'_show_tabs' # avoids name clashes
  dispatcher.manage_addDTMLMethod(id=dtml_name, file=dtml_text,
title=title)

 if REQUEST is None: # alt: else: self.manage_main(self, REQUEST)
  return
 try:
  u = dispatcher.DestinationURL()
 except:
  u = REQUEST['URL1']

 REQUEST.RESPONSE.redirect(u + '/manage_main')
############################################# File __init__.py
import Tabs

def initialize(context):
 """init Tabs product. Makes Tabs  appear in the add product list"""
 context.registerClass(
  Tabs.Tabs,
  constructors = (
   Tabs.manage_addTabsForm, # browser add Tabs product, hook into ZMI
   Tabs.manage_addTabs,  # program add Tabs product
  ),
  icon = 'pics/Tabs.gif'
 )

<dtml-comment>########### DTMLDoc manage_addTabsForm.dtml
</dtml-comment>
<snip>
<form name="form" action="<dtml-var URL1>"><br>
   <tr>
      <td><b>Id</b> (required):</td>
      <td><input type="text" name="id:required" value="JT"
size="30"></td>
   </tr>
   <tr>
      <td><b>Title</b>:</td>
      <td><input type="text" name="title:string" size="30"></td>
   </tr>
   <tr>
      <td><b>Render?</b>:
          <input type="hidden"   name="render:int:default" value="0"  >
      </td>
      <td>
          <input type="checkbox" name="render:int" checked value="1"
          >  render show_tabs.DTML in same folder?
       </td>
   </tr>
   <tr>
      <td colspan="2" align="right">
         <input type="submit" name="manage_addTabs:method"  value=" Add
" />
      </td>
   </tr>
</form>

######################################################
as you might see, in manage_addTabsForm.dtml the form action is
(the method) manage_addTabs
calling manage_addTabs without keyword parameter REQUEST (ie REQEST is
None)
implies programatic call (not through the web)
and manage_addTabs just returns,
anything else leads to a RESPONSE (DTML/HTML whatever sent to the client
browser)
--------------------------------------------------------------
hans augustin  (software developer)           hans@beehive.de
beehive elektronische medien GmbH       http://www.beehive.de
phone: +49 30 847-82 0                  fax: +49 30 847-82 299