fix: batch number search on pos (#45209)

* fix: price of items with batch number not having seperate item price on pos search bar

* fix: introduced batch number based sorting

erpnext/selling/page/point_of_sale/point_of_sale.py

@@ -64,7 +64,7 @@ def search_by_term(search_term, warehouse, price_list):
 	}
 
 	if batch_no:
-		price_filters["batch_no"] = batch_no
+		price_filters["batch_no"] = ["in", [batch_no, ""]]
 
 	price = frappe.get_list(
 		doctype="Item Price",
@@ -74,15 +74,25 @@ def search_by_term(search_term, warehouse, price_list):
 
 	def __sort(p):
 		p_uom = p.get("uom")
+		p_batch = p.get("batch_no")
+		batch_no = item.get("batch_no")
+
+		if batch_no and p_batch and p_batch == batch_no:
+			if p_uom == item.get("uom"):
+				return 0
+			elif p_uom == item.get("stock_uom"):
+				return 1
+			else:
+				return 2
 
 		if p_uom == item.get("uom"):
-			return 0
+			return 3
 		elif p_uom == item.get("stock_uom"):
-			return 1
+			return 4
 		else:
-			return 2
+			return 5
 
-	# sort by fallback preference. always pick exact uom match if available
+	# sort by fallback preference. always pick exact uom and batch number match if available
 	price = sorted(price, key=__sort)
 
 	if len(price) > 0: