adde find_related_products_v4 to tes trigram indexing

products/utils.py

@@ -1,7 +1,7 @@
 import logging
 
 from django.db.models import Q
-from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector
+from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector, TrigramSimilarity
 
 from products.models import Product
 
@@ -114,3 +114,14 @@ def find_related_products_v3(keyword):
     ).order_by('-rank')
     return products_qs
 
+
+def find_related_products_v4(keyword):
+    """
+    Using trigrams
+    """
+    fields=('name', 'description', 'tags__label', 'attributes__label', 'category__name')
+    products_qs = Product.objects.annotate(
+        similarity=TrigramSimilarity(fields, keyword)
+    ).order_by('-similarity')
+
+    return products_qs