[Zope-CMF] Problem adding Portal Images programatically

[Josef Albert Meile]

Hello group,

I saw Gr=E9goire Weber's HowTo about "adding objects at member 
creation" 
(http://www.zope.org/Members/gregweb/cmf_add_objects_at_member_creatio
n), took some code from it, and addapted it to my necessities. 

I need to add an image (on this case a logo) before I create an 
instance of my product. I can add the image and I can see it from my 
product and from the manage interface, but I can't see it from the 
portal. Whenever I click on the link that appears on the 
folder_contents form, I get the following error:

BEGIN ERROR MESSAGE --->

Error Type: Not Found
Error Value: Cannot find default view for
/NewPortal/Members/jmeile/GRYTXTR5.JPG"

Troubleshooting Suggestions

 The URL may be incorrect.
 The parameters passed to this resource may be incorrect.
 A resource that this resource relies on may be encountering an error.

Traceback (innermost last):
 File /usr/local/Zope-2.3.0/lib/python/ZPublisher/Publish.py, line 
 223, in publish_module
 File /usr/local/Zope-2.3.0/lib/python/ZPublisher/Publish.py, line 
 187, in publish
 File /usr/local/Zope-2.3.0/lib/python/Zope/__init__.py, line 221, in
 zpublisher_exception_hook (Object: GRYTXTR5.JPG)
 File /usr/local/Zope-2.3.0/lib/python/ZPublisher/Publish.py, line 
 171, in publish
 File /usr/local/Zope-2.3.0/lib/python/ZPublisher/mapply.py, line 
 160, in mapply (Object: view)
 File /usr/local/Zope-2.3.0/lib/python/ZPublisher/Publish.py, line 
 112, in call_object (Object: view)
 File 
 /usr/local/Zope-2.3.0/lib/python/Products/CMFCore/PortalContent.py,
 line 247, in view (Object: GRYTXTR5.JPG)
 File 
 /usr/local/Zope-2.3.0/lib/python/Products/CMFCore/PortalContent.py,
 line 234, in __call__ (Object: GRYTXTR5.JPG)
 File 
 /usr/local/Zope-2.3.0/lib/python/Products/CMFCore/PortalContent.py,
 line 227, in _getDefaultView (Object: GRYTXTR5.JPG)
 Not Found: (see above)

END ERROR MESSAGE --->

My editDone form looks like this:

BEGIN EDITDONE --->

<dtml-call "REQUEST.set('fileContent', 
            REQUEST.form['attachedImage'].read())">
<dtml-call "REQUEST.set('fileName',
            REQUEST.form['attachedImage'].filename)">
<dtml-call "REQUEST.set('objectName',getShortName(fileName))">
<dtml-let user=3D"portal_membership.getAuthenticatedMember().getUserName
()" folderLocation=3D"portal_membership.getHomeFolder(user).absolute_url
()">
    <dtml-call "REQUEST.set('myContext',REQUEST)">
    <dtml-call "createImage(portal_membership.getHomeFolder(user), 
                            fileName,fileContent)">
    <dtml-call "REQUEST.set('jobCompanyLogo',
                             folderLocation+'/'+objectName)">
</dtml-let>
<dtml-call
"propertysheets.JobOfferPropertySheet.manage_changeProperties
(REQUEST)">
<dtml-call "manage_changeProperties(REQUEST)">
<dtml-call indexObject>
<dtml-call "RESPONSE.redirect(URL2+'/folder_contents')">

END EDITDONE --->
note1: The function getShortName returns only the filename without 
its path
note2: attachedImage comes from this input: 
       <input type=3D"file" name=3D"attachedImage">

and my method createImage, which is external, looks like this:

BEGIN CREATEIMAGE --->

from Products.CMFDefault import Image
from string import rfind

def createImage(location, fileName, fileContent):
  #gets only the file name without its path
  pos=3Drfind(fileName,'\\')
  shortName=3DfileName[pos+1:len(fileName)]

  #adds the image in the specified location

Image.addImage
(self=3Dlocation,id=3DshortName,file=3DfileContent,title=3DfileName,co
ntent_type=3D'Image')

END CREATEIMAGE --->

I guess the problem could be the part where Gregory say:
  if hasattr(ob, '_setPortalTypeName'):
    ob._setPortalTypeName('Image')
I didn't put this line because then I get another error which says 
that
names beginning with "_" are forbidden.

What could be wrong?

Thanks in advanced,
Josef.