search result pagination working

products/views.py

@@ -145,8 +145,14 @@ def load_coop_products(request):
 def product_search(request):
       """
       Takes a string of data, return relevant products
+
+      Params:
+      - query_string: used for search [MANDATORY]
+      - limit: max number of returned instances [OPTIONAL]
+      - offset: where to start counting results [OPTIONAL]
       """
       query_string = request.GET.get('query_string', None)
+
       if query_string is None:
             return Response({"errors": {"details": "No query string to parse"}})
       try:
@@ -166,8 +172,19 @@ def product_search(request):
             # order results and respond
             result_list = list(result_set)
             ranked_products = sorted(result_list, key= lambda rank:rank.rank, reverse=True)
-            # TODO: slice ranked_products as per pagination
             serializer = SearchResultSerializer(ranked_products, many=True)
-            return Response(data={"filters": filters, "products": [dict(i) for i in serializer.data]})
+            product_results = [dict(i) for i in serializer.data]
+            # check for pagination
+            limit = request.GET.get('limit', None)
+            offset = request.GET.get('offset', None)
+            if limit is not None and offset is not None:
+                  limit = int(limit)
+                  offset = int(offset)
+                  product_results = product_results[offset:(limit+offset)]
+            elif limit is not None:
+                  limit = int(limit)
+                  product_results = product_results[:limit]
+
+            return Response(data={"filters": filters, "products": product_results})
       except Exception as e:
             return Response({"errors": {"details": str(e)}}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)