Get queryset from RelatedFilter after it was applied?

[RobinRamael]

Is it possible to get the filtered queryset from a related filter?

Say I have models:

class A(models.Model):
    field = models.CharField()


class B(models.Model):
    a = models.ForeignKey(A)

and set up filtering for them

class AFilter(filters.FilterSet):
    class Meta:
        fields = ('field',)


class BFilter(filters.FilterSet):
    a = filters.RelatedFilter(AFilter, queryset=A.objects.all())

    class Meta:
        fields = ('a',)

And use these in a view:

b_qs = BFilter({'a__field': 'foo'}).qs

I was wondering wether there was anyway to get the A queryset from the BFilter as if I was doing

a_qs = AFilter({'field': 'foo'}).qs

without having to resort to removing 'a__' from all keys in the query param dict.

[rpkilby]

The short answer is no, not currently. However, you may be interested in #199, which creates some new API surface, and reworks how related filtering is performed. eg, once #199 is cleaned up and merged, you'd be able to access the related queryset like so:

BFilter({'a__field': 'foo'}).related_filtersets['a']

[rpkilby]

Closing this, as there isn't anything actionable. #199 still needs some polishing, but it will cover the described use case and generally seems like the path forward.

[RobinRamael]

Thanks!