fix: incorrect invoice qty

(cherry picked from commit 96cdb7d54f)

erpnext/stock/doctype/purchase_receipt/purchase_receipt.py

@@ -8,7 +8,7 @@ import frappe
 from frappe import _, throw
 from frappe.desk.notifications import clear_doctype_notifications
 from frappe.model.mapper import get_mapped_doc
-from frappe.query_builder.functions import CombineDatetime
+from frappe.query_builder.functions import Abs, CombineDatetime, Sum
 from frappe.utils import cint, flt, get_datetime, getdate, nowdate
 from pypika import functions as fn
 
@@ -1372,21 +1372,26 @@ def get_invoiced_qty_map(purchase_receipt):
 
 
 def get_returned_qty_map(purchase_receipt):
-	"""returns a map: {so_detail: returned_qty}"""
+	"""returns a map: {pr_detail: returned_qty}"""
-	returned_qty_map = frappe._dict(
-		frappe.db.sql(
-			"""select pr_item.purchase_receipt_item, abs(pr_item.qty) as qty
-		from `tabPurchase Receipt Item` pr_item, `tabPurchase Receipt` pr
-		where pr.name = pr_item.parent
-			and pr.docstatus = 1
-			and pr.is_return = 1
-			and pr.return_against = %s
-	""",
-			purchase_receipt,
-		)
-	)
 
-	return returned_qty_map
+	pr = frappe.qb.DocType("Purchase Receipt")
+	pr_item = frappe.qb.DocType("Purchase Receipt Item")
+
+	query = (
+		frappe.qb.from_(pr)
+		.inner_join(pr_item)
+		.on(pr.name == pr_item.parent)
+		.select(pr_item.purchase_receipt_item, Sum(Abs(pr_item.qty)).as_("qty"))
+		.where(
+			(pr.docstatus == 1)
+			& (pr.is_return == 1)
+			& (pr.return_against == purchase_receipt)
+			& (pr_item.purchase_receipt_item.isnotnull())
+		)
+		.groupby(pr_item.purchase_receipt_item)
+	).run(as_list=1)
+
+	return frappe._dict(query) if query else frappe._dict()
 
 
 @frappe.whitelist()