From 9896907565e74e8957856eca32e9a0208221c30f Mon Sep 17 00:00:00 2001
From: Rohit Waghchaure <rohitw1991@gmail.com>
Date: Fri, 2 Apr 2021 00:27:08 +0530
Subject: [PATCH] fix: incorrect incoming rate for the sales return

---
 .../controllers/sales_and_purchase_return.py    | 17 ++++++++++++++++-
 erpnext/controllers/selling_controller.py       |  6 ++++--
 erpnext/stock/stock_ledger.py                   |  3 ++-
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/erpnext/controllers/sales_and_purchase_return.py b/erpnext/controllers/sales_and_purchase_return.py
index de61b35316..5f759b43bc 100644
--- a/erpnext/controllers/sales_and_purchase_return.py
+++ b/erpnext/controllers/sales_and_purchase_return.py
@@ -5,6 +5,7 @@ from __future__ import unicode_literals
 import frappe, erpnext
 from frappe import _
 from frappe.model.meta import get_field_precision
+from erpnext.stock.utils import get_incoming_rate
 from frappe.utils import flt, get_datetime, format_datetime
 
 class StockOverReturnError(frappe.ValidationError): pass
@@ -389,10 +390,24 @@ def make_return_doc(doctype, source_name, target_doc=None):
 
 	return doclist
 
-def get_rate_for_return(voucher_type, voucher_no, item_code, return_against=None, item_row=None, voucher_detail_no=None):
+def get_rate_for_return(voucher_type, voucher_no, item_code, return_against=None,
+	item_row=None, voucher_detail_no=None, sle=None):
 	if not return_against:
 		return_against = frappe.get_cached_value(voucher_type, voucher_no, "return_against")
 
+	if not return_against and voucher_type == 'Sales Invoice' and sle:
+		return get_incoming_rate({
+			"item_code": sle.item_code,
+			"warehouse": sle.warehouse,
+			"posting_date": sle.get('posting_date'),
+			"posting_time": sle.get('posting_time'),
+			"qty": sle.actual_qty,
+			"serial_no": sle.get('serial_no'),
+			"company": sle.company,
+			"voucher_type": sle.voucher_type,
+			"voucher_no": sle.voucher_no
+		}, raise_error_if_no_rate=False)
+
 	return_against_item_field = get_return_against_item_fields(voucher_type)
 
 	filters = get_filters(voucher_type, voucher_no, voucher_detail_no,
diff --git a/erpnext/controllers/selling_controller.py b/erpnext/controllers/selling_controller.py
index edc40c430a..54156f379c 100644
--- a/erpnext/controllers/selling_controller.py
+++ b/erpnext/controllers/selling_controller.py
@@ -311,14 +311,16 @@ class SellingController(StockController):
 
 		items = self.get("items") + (self.get("packed_items") or [])
 		for d in items:
-			if not cint(self.get("is_return")):
+			if not self.get("return_against"):
 				# Get incoming rate based on original item cost based on valuation method
+				qty = flt(d.get('stock_qty') or d.get('actual_qty'))
+
 				d.incoming_rate = get_incoming_rate({
 					"item_code": d.item_code,
 					"warehouse": d.warehouse,
 					"posting_date": self.get('posting_date') or self.get('transaction_date'),
 					"posting_time": self.get('posting_time') or nowtime(),
-					"qty": -1 * flt(d.get('stock_qty') or d.get('actual_qty')),
+					"qty": qty if cint(self.get("is_return")) else (-1 * qty),
 					"serial_no": d.get('serial_no'),
 					"company": self.company,
 					"voucher_type": self.doctype,
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index 121c51cf6a..df5f16fd41 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -372,7 +372,8 @@ class update_entries_after(object):
 		elif sle.voucher_type in ("Purchase Receipt", "Purchase Invoice", "Delivery Note", "Sales Invoice"):
 			if frappe.get_cached_value(sle.voucher_type, sle.voucher_no, "is_return"):
 				from erpnext.controllers.sales_and_purchase_return import get_rate_for_return # don't move this import to top
-				rate = get_rate_for_return(sle.voucher_type, sle.voucher_no, sle.item_code, voucher_detail_no=sle.voucher_detail_no)
+				rate = get_rate_for_return(sle.voucher_type, sle.voucher_no, sle.item_code,
+					voucher_detail_no=sle.voucher_detail_no, sle = sle)
 			else:
 				if sle.voucher_type in ("Purchase Receipt", "Purchase Invoice"):
 					rate_field = "valuation_rate"