RelationshipView doesn't provide a way to modify relations queryset for fetching and validation

[SafaAlfulaij]

django-rest-framework-json-api/rest_framework_json_api/serializers.py

Line 64 in 5e2f60d

return self.model_class.objects.get(pk=pk)

There is no way to change the queryset used for fetching the related input field but to subclass the class and replace all of to_internal_value.

Vanilla DRF provides a queryset parameter for related fields to do the mentioned. Checkout:
https://github.com/encode/django-rest-framework/blob/master/rest_framework/relations.py#L243-L260