[Zope-dev] [Newbie] #tree tag - help!

[Ian Clarke]

 I have been trying to create a site making use of the #tree
tag.  To get started I tried to follow the "Inplementing a navigation
tree" section of the Zbook tutorials, although I have removed some
superfluous stuff in an effort to track down the bug.
Everything seems to display correctly when I initially view the page (a
tree of my "Outline" folder is displayed), however whenever I click on
any of the sub-folders I get the error which you can find at the end of
this email.

Here is my "ll_menu" code (I suspect the problem is in here somewhere):

<SPAN CLASS="tree">
<!--#tree Outline branches_expr="objectValues(['Folder', 'DTML
Document'])" nowrap=1 sort=id-->
<!--#if expr="meta_type == 'Folder'"-->
<dtml-var id>
<!--#else-->
<A HREF="<!--#var "Outline.absolute_url()"-->/<!--#var
tree-item-url-->?<!--#if tree-s-->tree-s=<!--#var
tree-s--><!--#/if--><!--#if tree-e-->&tree-e=<!--#var
tree-e--><!--#/if--><!--#if tree-c-->&tree-c=<!--#var
tree-c--><!--#/if-->"><!--#var title_or_id--></a>
<!--#/if-->
<!--#/tree-->
</SPAN>

Can anyone give me a pointer as to what is going wrong?  Any help would
be much appreciated, this problem is giving me a headache!

Also, on a general point - is there any effort being made to make the
error reporting system more newbie friendly?

Ian.

Traceback (innermost last):
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 214, in
publish_module
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 179, in
publish
    File /home/zope/Zope/lib/python/Zope/__init__.py, line 201, in
zpublisher_exception_hook
      (Object: ElementWithAttributes)
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 165, in
publish
    File /home/zope/Zope/lib/python/ZPublisher/mapply.py, line 160, in
mapply
      (Object: main)
    File /home/zope/Zope/lib/python/ZPublisher/Publish.py, line 102, in
call_object
      (Object: main)
    File /home/zope/Zope/lib/python/OFS/DTMLDocument.py, line 166, in
__call__
      (Object: main)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: main)
    File /home/zope/Zope/lib/python/OFS/DTMLMethod.py, line 141, in
__call__
      (Object: standard_html_header)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: standard_html_header)
    File /home/zope/Zope/lib/python/OFS/DTMLDocument.py, line 162, in
__call__
      (Object: ll_menu)
    File /home/zope/Zope/lib/python/DocumentTemplate/DT_String.py, line
502, in __call__
      (Object: ll_menu)
    File /home/zope/Zope/lib/python/TreeDisplay/TreeTag.py, line 151, in
render
      (Object: Outline)
  AttributeError: __call__

--
Ian Clarke                        Email: I.Clarke@strs.co.uk
Homepage: http://www.gnu.demon.co.uk/
Also see: http://freenet.on.openprojects.net/
"All we see and all we seem is but a dream within a dream"

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