Merge pull request #29701 from nextchamp-saqib/consolidation-round-off-err

fix(pos): incorrect grand_total in case of inclusive taxes on item

erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py

@@ -84,12 +84,20 @@ class POSInvoiceMergeLog(Document):
 		sales_invoice.set_posting_time = 1
 		sales_invoice.posting_date = getdate(self.posting_date)
 		sales_invoice.save()
+		self.write_off_fractional_amount(sales_invoice, data)
 		sales_invoice.submit()
 
 		self.consolidated_invoice = sales_invoice.name
 
 		return sales_invoice.name
 
+	def write_off_fractional_amount(self, invoice, data):
+		pos_invoice_grand_total = sum(d.grand_total for d in data)
+
+		if abs(pos_invoice_grand_total - invoice.grand_total) < 1:
+			invoice.write_off_amount += -1 * (pos_invoice_grand_total - invoice.grand_total)
+			invoice.save()
+
 	def process_merging_into_credit_note(self, data):
 		credit_note = self.get_new_sales_invoice()
 		credit_note.is_return = 1
@@ -102,6 +110,7 @@ class POSInvoiceMergeLog(Document):
 		# TODO: return could be against multiple sales invoice which could also have been consolidated?
 		# credit_note.return_against = self.consolidated_invoice
 		credit_note.save()
+		self.write_off_fractional_amount(credit_note, data)
 		credit_note.submit()
 
 		self.consolidated_credit_note = credit_note.name
@@ -135,9 +144,15 @@ class POSInvoiceMergeLog(Document):
 						i.uom == item.uom and i.net_rate == item.net_rate and i.warehouse == item.warehouse):
 						found = True
 						i.qty = i.qty + item.qty
+						i.amount = i.amount + item.net_amount
+						i.net_amount = i.amount
+						i.base_amount = i.base_amount + item.base_net_amount
+						i.base_net_amount = i.base_amount
 
 				if not found:
 					item.rate = item.net_rate
+					item.amount = item.net_amount
+					item.base_amount = item.base_net_amount
 					item.price_list_rate = 0
 					si_item = map_child_doc(item, invoice, {"doctype": "Sales Invoice Item"})
 					items.append(si_item)
@@ -169,6 +184,7 @@ class POSInvoiceMergeLog(Document):
 						found = True
 				if not found:
 					payments.append(payment)
+
 			rounding_adjustment += doc.rounding_adjustment
 			rounded_total += doc.rounded_total
 			base_rounding_adjustment += doc.base_rounding_adjustment

erpnext/accounts/doctype/pos_invoice_merge_log/test_pos_invoice_merge_log.py

@@ -12,6 +12,7 @@ from erpnext.accounts.doctype.pos_invoice.test_pos_invoice import create_pos_inv
 from erpnext.accounts.doctype.pos_invoice_merge_log.pos_invoice_merge_log import (
 	consolidate_pos_invoices,
 )
+from erpnext.stock.doctype.stock_entry.stock_entry_utils import make_stock_entry
 
 
 class TestPOSInvoiceMergeLog(unittest.TestCase):
@@ -150,3 +151,132 @@ class TestPOSInvoiceMergeLog(unittest.TestCase):
 			frappe.set_user("Administrator")
 			frappe.db.sql("delete from `tabPOS Profile`")
 			frappe.db.sql("delete from `tabPOS Invoice`")
+
+
+	def test_consolidation_round_off_error_1(self):
+		'''
+		Test round off error in consolidated invoice creation if POS Invoice has inclusive tax
+		'''
+
+		frappe.db.sql("delete from `tabPOS Invoice`")
+
+		try:
+			make_stock_entry(
+				to_warehouse="_Test Warehouse - _TC",
+				item_code="_Test Item",
+				rate=8000,
+				qty=10,
+			)
+
+			init_user_and_profile()
+
+			inv = create_pos_invoice(qty=3, rate=10000, do_not_save=True)
+			inv.append("taxes", {
+				"account_head": "_Test Account VAT - _TC",
+				"charge_type": "On Net Total",
+				"cost_center": "_Test Cost Center - _TC",
+				"description": "VAT",
+				"doctype": "Sales Taxes and Charges",
+				"rate": 7.5,
+				"included_in_print_rate": 1
+			})
+			inv.append('payments', {
+				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 30000
+			})
+			inv.insert()
+			inv.submit()
+
+			inv2 = create_pos_invoice(qty=3, rate=10000, do_not_save=True)
+			inv2.append("taxes", {
+				"account_head": "_Test Account VAT - _TC",
+				"charge_type": "On Net Total",
+				"cost_center": "_Test Cost Center - _TC",
+				"description": "VAT",
+				"doctype": "Sales Taxes and Charges",
+				"rate": 7.5,
+				"included_in_print_rate": 1
+			})
+			inv2.append('payments', {
+				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 30000
+			})
+			inv2.insert()
+			inv2.submit()
+
+			consolidate_pos_invoices()
+
+			inv.load_from_db()
+			consolidated_invoice = frappe.get_doc('Sales Invoice', inv.consolidated_invoice)
+			self.assertEqual(consolidated_invoice.outstanding_amount, 0)
+			self.assertEqual(consolidated_invoice.status, 'Paid')
+
+		finally:
+			frappe.set_user("Administrator")
+			frappe.db.sql("delete from `tabPOS Profile`")
+			frappe.db.sql("delete from `tabPOS Invoice`")
+
+	def test_consolidation_round_off_error_2(self):
+		'''
+		Test the same case as above but with an Unpaid POS Invoice
+		'''
+		frappe.db.sql("delete from `tabPOS Invoice`")
+
+		try:
+			make_stock_entry(
+				to_warehouse="_Test Warehouse - _TC",
+				item_code="_Test Item",
+				rate=8000,
+				qty=10,
+			)
+
+			init_user_and_profile()
+
+			inv = create_pos_invoice(qty=6, rate=10000, do_not_save=True)
+			inv.append("taxes", {
+				"account_head": "_Test Account VAT - _TC",
+				"charge_type": "On Net Total",
+				"cost_center": "_Test Cost Center - _TC",
+				"description": "VAT",
+				"doctype": "Sales Taxes and Charges",
+				"rate": 7.5,
+				"included_in_print_rate": 1
+			})
+			inv.append('payments', {
+				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 60000
+			})
+			inv.insert()
+			inv.submit()
+
+			inv2 = create_pos_invoice(qty=6, rate=10000, do_not_save=True)
+			inv2.append("taxes", {
+				"account_head": "_Test Account VAT - _TC",
+				"charge_type": "On Net Total",
+				"cost_center": "_Test Cost Center - _TC",
+				"description": "VAT",
+				"doctype": "Sales Taxes and Charges",
+				"rate": 7.5,
+				"included_in_print_rate": 1
+			})
+			inv2.append('payments', {
+				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 60000
+			})
+			inv2.insert()
+			inv2.submit()
+
+			inv3 = create_pos_invoice(qty=3, rate=600, do_not_save=True)
+			inv3.append('payments', {
+				'mode_of_payment': 'Cash', 'account': 'Cash - _TC', 'amount': 1000
+			})
+			inv3.insert()
+			inv3.submit()
+
+			consolidate_pos_invoices()
+
+			inv.load_from_db()
+			consolidated_invoice = frappe.get_doc('Sales Invoice', inv.consolidated_invoice)
+			self.assertEqual(consolidated_invoice.outstanding_amount, 800)
+			self.assertNotEqual(consolidated_invoice.status, 'Paid')
+
+		finally:
+			frappe.set_user("Administrator")
+			frappe.db.sql("delete from `tabPOS Profile`")
+			frappe.db.sql("delete from `tabPOS Invoice`")

erpnext/accounts/doctype/sales_invoice/sales_invoice.py

@@ -285,7 +285,7 @@ class SalesInvoice(SellingController):
 				filters={ invoice_or_credit_note: self.name },
 				pluck="pos_closing_entry"
 			)
-			if pos_closing_entry:
+			if pos_closing_entry and pos_closing_entry[0]:
 				msg = _("To cancel a {} you need to cancel the POS Closing Entry {}.").format(
 					frappe.bold("Consolidated Sales Invoice"),
 					get_link_to_form("POS Closing Entry", pos_closing_entry[0])

erpnext/controllers/taxes_and_totals.py

@@ -106,6 +106,9 @@ class calculate_taxes_and_totals(object):
 		self.doc.conversion_rate = flt(self.doc.conversion_rate)
 
 	def calculate_item_values(self):
+		if self.doc.get('is_consolidated'):
+			return
+
 		if not self.discount_amount_applied:
 			for item in self.doc.get("items"):
 				self.doc.round_floats_in(item)
@@ -647,13 +650,13 @@ class calculate_taxes_and_totals(object):
 	def calculate_change_amount(self):
 		self.doc.change_amount = 0.0
 		self.doc.base_change_amount = 0.0
-
-		if self.doc.doctype == "Sales Invoice" \
-			and self.doc.paid_amount > self.doc.grand_total and not self.doc.is_return \
-			and any(d.type == "Cash" for d in self.doc.payments):
 		grand_total = self.doc.rounded_total or self.doc.grand_total
 		base_grand_total = self.doc.base_rounded_total or self.doc.base_grand_total
 
+		if self.doc.doctype == "Sales Invoice" \
+			and self.doc.paid_amount > grand_total and not self.doc.is_return \
+			and any(d.type == "Cash" for d in self.doc.payments):
+
 			self.doc.change_amount = flt(self.doc.paid_amount - grand_total +
 				self.doc.write_off_amount, self.doc.precision("change_amount"))
 

erpnext/tests/test_point_of_sale.py

@@ -1,15 +1,25 @@
 # Copyright (c) 2022, Frappe Technologies Pvt. Ltd. and Contributors
 # MIT License. See license.txt
 
+import unittest
+
+import frappe
 
 from erpnext.accounts.doctype.pos_profile.test_pos_profile import make_pos_profile
 from erpnext.selling.page.point_of_sale.point_of_sale import get_items
 from erpnext.stock.doctype.item.test_item import make_item
 from erpnext.stock.doctype.stock_entry.stock_entry_utils import make_stock_entry
-from erpnext.tests.utils import ERPNextTestCase
 
 
-class TestPointOfSale(ERPNextTestCase):
+class TestPointOfSale(unittest.TestCase):
+	@classmethod
+	def setUpClass(cls) -> None:
+		frappe.db.savepoint('before_test_point_of_sale')
+
+	@classmethod
+	def tearDownClass(cls) -> None:
+		frappe.db.rollback(save_point='before_test_point_of_sale')
+
 	def test_item_search(self):
 		"""
 		Test Stock and Service Item Search.