How to retrieve multiple slugs as url parameters with Django REST Framework DRF RetrieveAPIView? - django-rest-framework

Question

I am new to DRF. I am very interested in application of generic views. I want to rewrite the following code with generic DRF view RetrieveAPIView:
views.py
class ProductDetail(APIView):
def get_object(self, category_slug, product_slug):
try:
return Product.objects.filter(category__slug=category_slug).get(slug=product_slug)
except Product.DoesNotExist:
raise Http404
def get(self, request, category_slug, product_slug, format=None):
product = self.get_object(category_slug, product_slug)
serializer = ProductSerializer(product)
return Response(serializer.data)
urls.py
urlpatterns = [
path('products/<slug:category_slug>/<slug:product_slug>/',
ProductDetail.as_view())
]
models.py
class Category(models.Model):
name = models.CharField(max_length=255)
slug = models.SlugField()
class Meta:
ordering = ('name',)
def __str__(self):
return self.name
def get_absolute_url(self):
return f'/{self.slug}/'
class Product(models.Model):
category = models.ForeignKey(
Category, related_name='products', on_delete=models.CASCADE)
name = models.CharField(max_length=255)
slug = models.SlugField()
description = models.TextField(blank=True, null=True)
price = models.DecimalField(max_digits=6, decimal_places=2)
image = models.ImageField(upload_to='uploads/', blank=True, null=True)
thumbnail = models.ImageField(upload_to='uploads/', blank=True, null=True)
date_added = models.DateTimeField(auto_now_add=True)
class Meta:
ordering = ('-date_added',)
def __str__(self):
return self.name
def get_absolute_url(self):
return f'{self.category.slug}/{self.slug}/'
How can I use RetrieveAPIView instead of above APIView?
I tried to add a custom mixin, did not help:
class MultipleFieldLookupMixin:
def get_object(self):
queryset = self.get_queryset() # Get the base queryset
queryset = self.filter_queryset(queryset) # Apply any filter backends
multi_filter = {field: self.kwargs[field] for field in self.lookup_fields}
obj = get_object_or_404(queryset, **multi_filter) # Lookup the object
self.check_object_permissions(self.request, obj)
return obj
class ProductDetail(MultipleFieldLookupMixin, RetrieveAPIView):
queryset = Product.objects.filter(category__slug=category_slug).get(slug=product_slug)
serializer = ProductSerializer
lookup_fields = ['category_slug', 'product_slug']
Does not work.