feat: index and product detail view

shop/mixins.py

@@ -0,0 +1,27 @@
+from django.conf import settings
+from django.core.paginator import Paginator
+
+
+class FilteredQuerysetMixin:
+    queryset = None
+    filter_class = None
+
+    def get_filter_class(self):
+        return self.filter_class
+
+    def get_queryset(self):
+        filter_cls = self.get_filter_class()
+        filter_obj = filter_cls(self.request.GET)
+        filter_obj.is_valid()
+        qs = filter_obj.filter_queryset(self.queryset)
+        return qs
+
+
+class PaginatedQuerysetMixin:
+    objects_per_page = settings.ITEMS_PER_PAGE or 20
+
+    def get_paginated_queryset(self, qs):
+        paginator = Paginator(qs, self.objects_per_page)
+        page = self.request.GET.get("page", 1)
+        qs = paginator.get_page(page)
+        return qs