django-rest-framework non orm-based filtering

Question

I am using DjangoRestApi and while it works like a charm with queryset (orm-based) views, I am struggling to make views that use different back-end to behave same way orm-based views are. Notably I want to add filters and have them cast and validated automatically.

Pseudo code below:

class NewsFilter(django_filters.FilterSet):
    category = django_filters.NumberFilter(name='category')
    limit = django_filters.NumberFilter(name='limit')
    page = django_filters.NumberFilter(name='page')


class NewsView(generics.APIView):
    filter_class = NewsFilter

    def get(self, request):
        filters = self.filter_class(??)  # not sure, what to put here

        payload = logic.get_business_news(**filters.data)  # same

        return Response(payload, status=status.HTTP_200_OK)

Any hint how to tackle problem will be appreciated.

Ultimate goal is to:

user types something into url or sends via POST, django-rest intercepts relevant values, extracts them, casts them into correct type and return as a dictionary
filters are displayed as they would if serializer was ORM based

Ross Rogers · Accepted Answer · 2016-11-17 17:56:07Z

1

The function signature to any single filter is like

class MyFilter(django_filters.Filter):
    def filter(self,queryset,value):
        [...]

The function signature to a FilterSet is:

def __init__(self, data=None, queryset=None, prefix=None, strict=None):

So, it looks like you pass in request.GET as data param and then pass in your queryset.

answered Nov 17, 2016 at 17:56

Ross Rogers

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6 Comments

Drachenfels Over a year ago

I have slightly edited original question to clarify what I am looking for, as this answer is a) very incomplete and b) I have this feeling that don't answer my question

Ross Rogers Over a year ago

Fundamentally, FilterSet operates on querysets. Do you have a query set that you're filtering down? If not, you can't use FilterSet.

Drachenfels Over a year ago

I don't want to work with queryset as I don't use ORM, what I do want is to render form in /api/ endpoint so that developers and other non-so-techy guys could test/work with api without manually typing json payload and so on. I started to figured out that django-rest-framework is actually very limited framework, with only one workflow in mind. :/

Ross Rogers Over a year ago

Ah true. It really is mostly a backend for talking with machines. You would normally write your frontend as a javascript client.

Ross Rogers Over a year ago

I should add that DRF is only an addendum to Django. You can use DRF side-by-side with Django in the same app.

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