same code runs on two machines and barfs on the third

hi,

this is the relevant part of my model:

class Team(models.Model):
name = models.CharField(_("Team Name"),max_length=150,unique=True)
members =
tournament = models.ForeignKey(Tournament)

in my view I have the following line of code:
cr = Team.objects.filter(tournament_id=tournid)

I have three installations of this app. All have the latest trunk (all
the same version). The only difference between the three is that one is
on Fedora 14, one on Fedora 15 and one on Fedora 16. Deployment is the
same. All are on python 2.7 with slightly differing versions of
postgresql. On Fedora 14 and 16 the code runs ok. On Fedora 15, django
barfs saying:
'cannot resolve tournament_id into a field, fields available are: name,
tournament ...'

any clues?
--
regards
Kenneth Gonsalves

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