Adding filter in TracHours query form throws exception after migration vom 0.11 to 0.12

[technik@…]

We had the TracHoursPlugin installed on 0.11.7 and reinstalled it with 0.12 on a new machine.

When trying to add a filter to the hours query form, an exception is thrown:

AttributeError: 'list' object has no attribute 'setdefault'

Stacktrace:
File "/usr/local/lib/python2.6/dist-packages/Trac-0.12-py2.6.egg/trac/web/main.py", line 513, in _dispatch_request
  dispatcher.dispatch(req)
File "/usr/local/lib/python2.6/dist-packages/Trac-0.12-py2.6.egg/trac/web/main.py", line 235, in dispatch
  resp = chosen_handler.process_request(req)
File "/usr/local/lib/python2.6/dist-packages/TracHoursPlugin-0.5.2-py2.6.egg/trachours/hours.py", line 234, in process_request
  return self.process_timeline(req)
File "/usr/local/lib/python2.6/dist-packages/TracHoursPlugin-0.5.2-py2.6.egg/trachours/hours.py", line 509, in process_timeline
  return self.display_html(req, query)
File "/usr/local/lib/python2.6/dist-packages/TracHoursPlugin-0.5.2-py2.6.egg/trachours/hours.py", line 615, in display_html
  constraint = constraints.setdefault(field, {})

[anonymous]

Same problem here after upgrade to trac 0.12 and plugin update to 0.5.2. Filters cannot be used.

[Ryan J Ollos]

The error you see here is common when trying to use a 0.11 plugin under 0.12 due to a change in the Trac API. This may be fixed on the 0.12 branch already ... will test shortly.