search optimization broken by tags

products/views.py

@@ -2,6 +2,7 @@ import logging
 import csv
 import datetime
 import operator
+from functools import reduce
 
 from django.shortcuts import render
 from django.conf import settings
@@ -142,18 +143,29 @@ def product_search(request):
             result_set = set()
             # split query string into single words
             chunks = query_string.split(' ')
-            # create search queries
-            name_search = Q(name__in=chunks)
-            description_search = Q(description__in=chunks)
-            tags_search = Q(tags__in=chunks)
-            category_search = Q(category__in=chunks)
-            attributes_search = Q(attributes__in=chunks)
-            query_list = [name_search, description_search, tags_search, category_search, attributes_search]
-            # get instances
-            products = Product.objects.filter(reduce(operator.or_, query_list))
-            # add to set
-            for item in products:
-                  result_set.add(item)
+
+            for chunk in chunks:
+                  # search in name
+                  products = Product.objects.filter(name=chunk)
+                  for item in products:
+                        result_set.add(item)
+                  # search in description
+                  products = Product.objects.filter(description=chunk)
+                  for item in products:
+                        result_set.add(item)
+                  # search in tags
+                  products = Product.objects.filter(tags=chunk)
+                  for item in products:
+                        result_set.add(item)
+                  # search in category
+                  products = Product.objects.filter(category=chunk)
+                  for item in products:
+                        result_set.add(item)
+                  # search in attributes
+                  products = Product.objects.filter(attributes=chunk)
+                  for item in products:
+                        result_set.add(item)
+
             # serialize and respond
             data = serializers.serialize('json', result_set)
             return Response(data=data)