Trying to understand duplicate results from related_set

Hello,

my first post here.
I've been poking at this duplicate result thing
and it's come down to maybe a fundamental what-does-django-do question:


class Medium(models.Model):
artifact = models.ForeignKey('Artifact', on_delete=models.PROTECT)


class Artifact(models.Model):
def get_medium(self,idx):

try:
media = self.medium_set.all()
for m in media: # <-- THIS
pass # <-- THIS
return media[idx]
except:
return False


Why would iterating over media give me correct results,
get_medium(0), get_medium(1) == 9, 13

but if I don't, I get a duplicate row?
get_medium(0), get_medium(1) == 9, 9


-Michael



--
Michael Ross <gmx@ross.cx>

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