Heyo!
I've been using DRF for quite some time, so I'd like to start by saying:
thanks so much! It's been very useful to me and I appreciate it sincerely.
Anyway, I'm trying to tie a few things together:
class Leaderboard(models.Model):
competition = models.ForeignKey('competitions.Competition',
on_delete=models.CASCADE, related_name="leaderboards")
class Column(models.Model):
leaderboard = models.ForeignKey(Leaderboard, on_delete=models.CASCADE,
related_name="columns")
shared_columns = models.ManyToManyField('Column')
class Competition(models.Model):
pass
So what I'd like to do is make sure any Column that is "shared_columns"
with another belongs to the same Leaderboard. So you the "filtering"
queryset would look something like...
class ColumnSerializer(WritableNestedModelSerializer):
computation_columns =
serializers.PrimaryKeyRelatedField(queryset=Column.objects.all(),
many=True, required=False)
class Meta:
model = Column
fields = (
'shared_columns'
)
def get_fields(self):
fields = super().get_fields()
if self.instance:
fields['computation_columns'].queryset =
self.instance.leaderboard.columns.all()
return fields
However, I can't seem to figure out how to *ever* get the instance of the
parent leaderboard before `create()` or `update()`. I did find out about
`self.root` to get the base instance of a Competition, but I have no idea
how to associate that with a column underneath..
Thanks for any help!
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