From 2d296f1561c20ab7c1d2d9c519e98fd36b33cbe2 Mon Sep 17 00:00:00 2001
From: Parsa Nazer <parsa.nazerrr@gmail.com>
Date: Sat, 14 Feb 2026 11:48:17 +0330
Subject: [PATCH] add PostgreSQL support and enhance product search
 functionality

---
 backend/core/settings/base.py                     |  1 +
 backend/product/migrations/0070_enable_pg_trgm.py | 12 ++++++++++++
 backend/product/views.py                          | 14 +++++++++++---
 3 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100644 backend/product/migrations/0070_enable_pg_trgm.py

diff --git a/backend/core/settings/base.py b/backend/core/settings/base.py
index 8e49391..65ea872 100644
--- a/backend/core/settings/base.py
+++ b/backend/core/settings/base.py
@@ -54,6 +54,7 @@ INSTALLED_APPS = [
     "django.contrib.messages",
     "django.contrib.staticfiles",
     "django.contrib.humanize",
+    "django.contrib.postgres",
     # Third-Party Apps
     "storages",
     "corsheaders",
diff --git a/backend/product/migrations/0070_enable_pg_trgm.py b/backend/product/migrations/0070_enable_pg_trgm.py
new file mode 100644
index 0000000..a09ab22
--- /dev/null
+++ b/backend/product/migrations/0070_enable_pg_trgm.py
@@ -0,0 +1,12 @@
+from django.db import migrations
+from django.contrib.postgres.operations import CreateExtension
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("product", "0069_alter_productvariant_currency"),
+    ]
+
+    operations = [
+        CreateExtension("pg_trgm"),
+    ]
diff --git a/backend/product/views.py b/backend/product/views.py
index d00dfd9..9f24514 100644
--- a/backend/product/views.py
+++ b/backend/product/views.py
@@ -6,7 +6,9 @@ from .models import *
 from .serializers import *
 from rest_framework import status
 from rest_framework.response import Response
-from django.db.models import Q
+from django.db.models import Q, Value
+from django.db.models.functions import Coalesce
+from django.contrib.postgres.search import TrigramSimilarity
 from django.shortcuts import get_object_or_404
 from rest_framework.permissions import IsAuthenticatedOrReadOnly
 from utils.pagination import StructurePagination
@@ -286,8 +288,12 @@ class AllProductsView(APIView):
             # Search filter
             search_query = request.query_params.get('search')
             if search_query:
-                products = products.filter(Q(name__icontains=search_query) | Q(
-                    description__icontains=search_query))
+                products = products.annotate(
+                    similarity=(
+                        TrigramSimilarity('name', search_query)
+                        + TrigramSimilarity(Coalesce('description', Value('')), search_query)
+                    )
+                ).filter(similarity__gt=0.1)
 
             # Price filters
             price_gte = request.query_params.get('price_gte')
@@ -314,6 +320,8 @@ class AllProductsView(APIView):
             sort_by = request.query_params.get('sort')
             if sort_by in ['name', '-name', 'created_at', '-created_at']:
                 products = products.order_by(sort_by)
+            elif search_query:
+                products = products.order_by('-similarity', 'name')
             else:
                 products = products.order_by('name')