Re: [Zope] ZClass based on OFS:Image Error: unsliceable object

13 Apr 2001

      Hi, Stefan

You are not doing anything wrong.  Presuming you are using zope 2.3.1,
there is a known bug in ZClasses that makes createInObjectManager() not
work sometimes.  It has been fixed in CVS and will be OK again in 2.3.2.

To make it work again:

Edit your lib/python/ZClasses/ZClass.py file.

change the last line of ZClass:createInObjectManager (around line 544)
from:

return folder._getOb(i.id)

to:

return folder._getOb(i.getId())

The CVS version is a bit different, but does the same thing.

Restart Zope, and things should work OK again.

-- Jim Washington

Stefan Mallepell wrote:
...
Hi
I'm trying to make a extended Image ZClass. The basic idee is that I would
like to have some more properties, like copyright, description ...
Unfortunately when I try to add such a object I get always the following
error:
Error Type: Type Error
Error Value: unsliceable object
What is it what I'm doing wrong? I looked for hours through image products
which are published on www.zope.org. I also studied How To's, tutorials, The
Zope Book and Zope Developer Guide. But I couldn't find any info to help ...
I got the same error when I tryed the How-To: ZClass Properties
http://www.zope.org/Members/1staffor/zProperties . And this how to was very
detailed and you can't do it wrong ... - so I really don't understand what
it is what I'm doing wrong :(
Is there someone around who can tell me what I'm doing wrong? Please answer
.. I'm frustrated, desperate ...
This are the definitions of my ZClass (OFS:Image)
*Property Sheet: MainProperties
*Properties: title(string), description(text), copyright(string)
*ImgClass_addForm
<HTML>
<HEAD><TITLE>Add Extended Image</TITLE></HEAD>
<BODY BGCOLOR="#FFFFFF" LINK="#000099" VLINK="#555555">
<H2>Add Extended Image</H2>
<form action="ImgClass_add" method="post" enctype="multipart/form-data">
<table>
  <tr>
    <th>Id</th>
    <td><input type=text name=id></td>
  </tr>
  <tr>
    <th>Title</th>
    <td><input type=text name=title></td>
  </tr>
  <tr>
    <th valign="Top">Description</th>
    <td><textarea name="description" rows="6" cols="35"></textarea></td>
  </tr>
  <tr>
    <th>Copyright</th>
    <td><input type=text name=copyright></td>
  </tr>
  <tr>
    <td align="left" valign="top">
      File
    </td>
    <td align="left" valign="top">
      <input type="file" name="file" size="25" value="">
    </td>
  </tr>
  <tr>
    <td></td>
    <td><input type=submit value=" Add "></td>
  </tr>
</table></form>
</body></html>
*ImgClass_add
<HTML>
<HEAD><TITLE>Add ImgClass</TITLE></HEAD>
<BODY BGCOLOR="#FFFFFF" LINK="#000099" VLINK="#555555">
<dtml-with "ImgClass.createInObjectManager(REQUEST['id'], REQUEST)">
  <dtml-call "propertysheets.MainProperties.manage_editProperties(REQUEST)">
</dtml-with>
<dtml-if NoRedir>
<dtml-else>
  <dtml-if DestinationURL>
<dtml-call "RESPONSE.redirect(DestinationURL+'/manage_workspace')">
<dtml-else>
<dtml-call "RESPONSE.redirect(URL2+'/manage_workspace')">
  </dtml-if>
</dtml-if>
</body></html>