Fix nearest hubs fallback when source missing

geo_app/schema.py

@@ -1474,9 +1474,9 @@ class Query(graphene.ObjectType):
             nodes_col = db.collection('nodes')
             start = nodes_col.get(source_uuid)
             if not start:
-                logger.warning("Source node %s not found for nearest hubs", source_uuid)
+                logger.warning("Source node %s not found for nearest hubs, falling back to radius search", source_uuid)
-                return []
+                source_uuid = None
-
+            else:
                 def is_target_hub(doc):
                     if doc.get('_key') == source_uuid:
                         return False
@@ -1626,6 +1626,46 @@ class Query(graphene.ObjectType):
         db = get_db()
         ensure_graph()
 
+        # If hub_uuid + product_uuid provided, use graph search to return only offers with routes.
+        if hub_uuid and product_uuid:
+            try:
+                nodes_col = db.collection('nodes')
+                expanded_limit = max(limit * 5, limit)
+                route_options = Query.resolve_offers_by_hub(
+                    Query, info, hub_uuid, product_uuid, expanded_limit
+                )
+                offers = []
+                for option in route_options or []:
+                    if not option.routes:
+                        continue
+                    node = nodes_col.get(option.source_uuid)
+                    if not node:
+                        continue
+                    offers.append(OfferWithRouteType(
+                        uuid=node['_key'],
+                        product_uuid=node.get('product_uuid'),
+                        product_name=node.get('product_name'),
+                        supplier_uuid=node.get('supplier_uuid'),
+                        supplier_name=node.get('supplier_name'),
+                        latitude=node.get('latitude'),
+                        longitude=node.get('longitude'),
+                        country=node.get('country'),
+                        country_code=node.get('country_code'),
+                        price_per_unit=node.get('price_per_unit'),
+                        currency=node.get('currency'),
+                        quantity=node.get('quantity'),
+                        unit=node.get('unit'),
+                        distance_km=option.distance_km,
+                        routes=option.routes,
+                    ))
+                    if len(offers) >= limit:
+                        break
+                logger.info("Found %d offers by graph for hub %s", len(offers), hub_uuid)
+                return offers
+            except Exception as e:
+                logger.error("Error finding offers by hub %s: %s", hub_uuid, e)
+                return []
+
         aql = """
         FOR offer IN nodes
             FILTER offer.node_type == 'offer'