How can I optimize the following code

Question

color and size are taken from URL using GET method in django color and size are check box inputs and are recieved as a list in the view.py file

I am filtering my Prouct

Answer 1

There is no need to use intersection here. A combined filter would be much better. Also, request.GET is already a dict.

result = Product.objects.all()
if 'size' in request.GET:
    result = result.filter(attributes__size__in=request.GET['size'])
if 'color' in request.GET:
    result = result.filter(attributes__color__in=request.GET['color'])

If you've got lots of parameters, and they all map to elements in attributes, you could do it dynamically:

result = Product.objects.all()
for key, value in request.GET:
    result = result.filter(**{'attributes__{}__in'.format(key): value})