get_queryset.py

from django.db.models import Q

# `/GET /items?name__startswith=Grap&price_gte=300&price__lte=700`
def get_queryset(self):
    filters = {
        "name__startswith": self.request.GET.get("name__startswith ", ""),
        "price__gte": self.request.GET.get("price_gte ", ""),
        "price__lte": self.request.GET.get("price__lte", ""),
    }

    def queries(filters):
        return [Q(**{k: v}) for k, v in filters.items() if v]

    return Item.objects.filter(*queries(filters))