How to serialize related models in Django Rest API?

Question

I have tried all the solutions. Still cannot resolve it. Here are the codes.

models.py

class Car(models.Model):
    car_name = models.CharField(max_length=250)
    car_description = models.CharField(max_length=250)


    def __str__(self):
        return self.car_name + ' - ' + str(self.pk)

class Owners(models.Model):
    car = models.ForeignKey(Car, on_delete=models.CASCADE, default=0)
    owner_name = models.CharField(max_length=250)
    owner_desc = models.CharField(max_length=250)

    def get_absolute_url(self):
        return reverse('appname:index')

    def __str__(self):
        return self.owner_name + ' - ' +    self.owner_desc

serializers.py

class OwnersSerializer(serializers.ModelSerializer):  
    class Meta:
        model = Owners
        fields = '__all__'


class CarSerializer(serializers.ModelSerializer):  

    owners = OwnersSerializer(many=True, read_only=True)
    class Meta:
        model = Car
        fields = '__all__'

views.py

class CarList(APIView):

    def get(self, request):
        cars = Car.objects.all()
        serializer = CarSerializer(cars, many=True)
        return Response(serializer.data)

    def post(self):
        pass

I can't get to view all the 'Owner' objects related to a certain object of the 'Car' class.

What does the output serialized data look like? And what do you want it to look like? — Brendan Abel
– Brendan Abel, Commented Sep 12, 2016 at 20:34
You're not getting the description field either. Have you tried setting the fields value explicitly to include all the fields, instead of just using __all__ — Brendan Abel
– Brendan Abel, Commented Sep 12, 2016 at 20:45
Oops, I got the description data. Edited. [ { "car_name": "ada", "car_description": "adad" }, { "car_name": "sdada", "car_description": "fafa" } ] — Douche Tholi
– Douche Tholi, Commented Sep 12, 2016 at 20:47

Brendan Abel · Accepted Answer · 2016-09-12 20:56:58Z

1

You need to define a related name on the ForeignKey to create the reverse reference.

class Owners(models.Model):

    car = models.ForeignKey(Car, on_delete=models.CASCADE, default=0, related_name='owners')

answered Sep 12, 2016 at 20:56

Brendan Abel

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