TypeError: 'NoneType' object is not iterable

[David]

How to Reproduce

While doing a GET operation on /admin/ticket/template_admin, Trac issued an internal error.

I installed the TicketExt plugin like so:

svn export ​http://trac-hacks.org/svn/ticketextplugin cd ticketextplugin/0.11 python setup.py bdist_egg and then I moved dist/TicketExtPlugin-0.3.2-py2.6.egg into the plugins directory of trac

Request parameters:

{'cat_id': u'ticket', 'panel_id': u'template_admin', 'path_info': None}

User Agent was: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110422 Ubuntu/10.10 (maverick) Firefox/3.6.17

System Information

Trac	0.11.7
Python	2.6.5 (r265:79063, Apr 16 2010, 14:15:55) [GCC 4.4.3]
setuptools	0.6
SQLite	3.6.22
pysqlite	2.4.1
Genshi	0.5.1
mod_python	3.3.1
Pygments	1.2.2
Subversion	1.6.6 (r40053)
CustomFieldAdmin	0.2.5
jQuery:	1.3.2

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/trac/web/main.py", line 450, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/dist-packages/trac/web/main.py", line 206, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/dist-packages/trac/admin/web_ui.py", line 114, in process_request
    path_info)
  File "build/bdist.linux-x86_64/egg/ticketext/template_admin.py", line 67, in render_admin_panel
    self._process_read(req, page_param)
  File "build/bdist.linux-x86_64/egg/ticketext/template_admin.py", line 91, in _process_read
    for cf in customfields:
TypeError: 'NoneType' object is not iterable

[Remy Blank]

PluginIssue (ticketext).