>>> Leaderboard.objects.distinct('DEVICEID')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/query.py", line 72, in __repr__
    data = list(self[:REPR_OUTPUT_SIZE + 1])
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/query.py", line 87, in __len__
    self._result_cache.extend(self._iter)
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/query.py", line 291, in iterator
    for row in compiler.results_iter():
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/sql/compiler.py", line 763, in results_iter
    for rows in self.execute_sql(MULTI):
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/sql/compiler.py", line 808, in execute_sql
    sql, params = self.as_sql()
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/models/sql/compiler.py", line 91, in as_sql
    result.append(self.connection.ops.distinct_sql(distinct_fields))
  File "/Applications/djangostack-1.3.1-0/python/lib/python2.6/site-packages/django/db/backends/__init__.py", line 572, in distinct_sql
    raise NotImplementedError('DISTINCT ON fields is not supported by this database backend')
NotImplementedError: DISTINCT ON fields is not supported by this database backend

>>> Leaderboard.objects.distinct()
[<Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, <Leaderboard: Leaderboard object>, '...(remaining elements truncated)...']
KeyboardInterrupt
>>> 


###################
###################
AFTER I MADE THE CHANGE PROPOSED IN MY ATTACHED PATCH
###################
###################



bash-3.2$ python manage.py shell
Python 2.6.5 (r265:79063, Sep 20 2011, 08:38:57) 
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from V1API.models import *
>>> Leaderboard.objects.distinct('DEVICEID').values('DEVICEID').count()
175
>>> 
KeyboardInterrupt
>>> 


bash-3.2$ python manage.py version
1.4