Django rest framework - filter many-to-many field

Question

Suppose I have a model like this one:

class Car(models.Model):
    images = models.ManyToManyField(Image)

class Image(models.Model):
    path = models.CharF         


        

Answer 1

I don´t know if you are still looking for this answer, but maybe it helps someone else.

First create a filter class like this:

class CarFilter(django_filters.FilterSet):
    having_image = django_filters.Filter(name="images", lookup_type='in')

    class Meta:
        model = Car

Then add the filter to your view:

class CarList(generics.ListAPIView):
    model = Car
    serializer_class = CarSerializer
    filter_class = CarFilter

And that´s all. Add "?having_image=1" to your query string and Django filter should do the trick for you.

Hope it helps..

Answer 2

I have found a other Stackoverflow question that has a solution that could be used here:

How can I apply a filter to a nested resource in Django REST framework?

(see under the "Solution" headline in the question itself)