I’m encountering a MultiValueDictKeyError in my Django project when trying to access the API at http://127.0.0.1:8000/api/products/. The error occurs on this line: category = self.request.GET['category'].

Here is my view:

class ProductList(generics.ListCreateAPIView):
    queryset = models.Product.objects.all()
    serializer_class = serializers.ProductListSerializer

    def get_queryset(self):
        qs = super().get_queryset()
        category = self.request.GET['category']
        category = models.Product.objects.get(category)
        qs = qs.filter(category=category)
        return qs

My Product model is defined as follows:

class Product(models.Model):
    category = models.ForeignKey(ProductCategory, on_delete=models.SET_NULL, null=True, related_name='product_in_category')
    retailer = models.ForeignKey(Retailer, on_delete=models.SET_NULL, null=True)
    title = models.CharField(max_length=200)
    detail = models.CharField(max_length=200, null=True)
    price = models.FloatField()

    def __str__(self) -> str:
        return self.title

Here is my serializer:

class ProductListSerializer(serializers.ModelSerializer):
    productreview = serializers.StringRelatedField(many=True, read_only=True)

    class Meta:
        model = models.Product
        fields = ['id', 'category', 'retailer', 'title', 'detail', 'price', 'productreview']

    def __init__(self, *args, **kwargs):
        super(ProductListSerializer, self).__init__(*args, **kwargs)

I am trying to call a list of products according to the product category from my React frontend, but I keep encountering the MultiValueDictKeyError. I tried using GET.get and various other approaches but haven’t been able to resolve the issue.

Here is the error traceback:

Request Method: GET
Request URL: http://127.0.0.1:8000/api/products/
Django Version: 4.2.13
Exception Type: MultiValueDictKeyError
Exception Value: 'category'

How can I fix this error and properly filter the products by category?