Features: 1) Streamlined stock and price annotations by removing redundant Max wrapping;

Fixes: None;

Extra: 1) Simplified code structure for readability; 2) Optimized boolean calculations for annotations;

core/filters.py

@@ -277,20 +277,16 @@ class ProductFilter(FilterSet):
         ordering_param = self.data.get("order_by", "")
 
         qs = qs.annotate(
-            has_stock=Max(
-                Case(
+            has_stock=Case(
                     When(stocks__quantity__gt=0, then=Value(True)),
                     default=Value(False),
                     output_field=BooleanField(),
-                )
-            ),
-            has_price=Max(
-                Case(
+                ),
+            has_price=Case(
                     When(stocks__price__gt=0, then=Value(True)),
                     default=Value(False),
                     output_field=BooleanField(),
-                )
-            ),
+                ),
         ).annotate(
             personal_orders_only=Case(
                 When(has_stock=False, has_price=False, then=Value(True)),