KeyError: 'fields'

[Alexander Malaev]

After upgrade of the trac from 0.10 to 0.11 and installation of MTP i got KeyError: 'fields'

How to Reproduce

While doing a GET operation on /ticket/504, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'action': u'diff', 'id': u'504', 'version': u'16'}

User Agent was: Mozilla/5.0 (X11; U; Linux x86_64; ru; rv:1.9.0.1) Gecko/2008070400 Firefox/3.0.1

System Information

Trac	0.11.1
Python	2.5 (r25:51908, Jan 10 2008, 18:01:52) [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)]
setuptools	0.6c9
SQLite	3.2.8
pysqlite	2.4.1
Genshi	0.5.1
Pygments	0.11.1
Subversion	1.4.3 (r23084)
jQuery:	1.2.6

Python Traceback

Traceback (most recent call last):
  File "/usr/local/lib64/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/local/lib64/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/web/main.py", line 209, in dispatch
    self._post_process_request(req, *resp)
  File "/usr/local/lib64/python2.5/site-packages/Trac-0.11.1-py2.5.egg/trac/web/main.py", line 299, in _post_process_request
    resp = f.post_process_request(req, *resp)
  File "build/bdist.linux-x86_64/egg/mastertickets/web_ui.py", line 64, in post_process_request
    for field, field_data in change['fields'].iteritems():
KeyError: 'fields'

[anonymous]

Same problem here if i want to view the differences between ticket comments (diff):

2008-09-25 14:55:33,295 Trac[main] ERROR: 'NoneType' object is unsubscriptable
Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\trac\web\main.py", line 233, in dispatch
    self._post_process_request(req)
  File "C:\Python25\Lib\site-packages\trac\web\main.py", line 301, in _post_process_request
    f.post_process_request(req, *(None,)*extra_arg_count)
  File "build\bdist.win32\egg\mastertickets\web_ui.py", line 44, in post_process_request
    tkt = data['ticket']
TypeError: 'NoneType' object is unsubscriptable
2008-09-25 14:55:33,295 Trac[main] ERROR: 'fields'
Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\trac\web\main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "C:\Python25\Lib\site-packages\trac\web\main.py", line 209, in dispatch
    self._post_process_request(req, *resp)
  File "C:\Python25\Lib\site-packages\trac\web\main.py", line 299, in _post_process_request
    resp = f.post_process_request(req, *resp)
  File "build\bdist.win32\egg\mastertickets\web_ui.py", line 64, in post_process_request
    for field, field_data in change['fields'].iteritems():
KeyError: 'fields'
2008-09-25 14:55:33,483 Trac[main] DEBUG: 1461 unreachable objects found.

[petr.odut]

have the same problem with diff feature:

Python Traceback

Traceback (most recent call last):
  File "/opt/python/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/opt/python/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/main.py", line 209, in dispatch
    self._post_process_request(req, *resp)
  File "/opt/python/lib/python2.5/site-packages/Trac-0.11-py2.5.egg/trac/web/main.py", line 299, in _post_process_request
    resp = f.post_process_request(req, *resp)
  File "build/bdist.linux-i686/egg/mastertickets/web_ui.py", line 64, in post_process_request
    for field, field_data in change['fields'].iteritems():
KeyError: 'fields'

[Sigurd Hogsbro]

I'm seeing the exact same issue. Not determined cause as yet.

[martin@…]

this bug is also reported in #3920 - but the posted patch doesn't work

[anonymous]

A new patch (which works) can be found on #3920 - I'm closing this ticket as duplicate.