fix: Merge debit and credit in transaction currency while merging gle with similar head

(cherry picked from commit e43697d359)

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -1766,6 +1766,49 @@ class TestSalesInvoice(FrappeTestCase):
 
 		self.assertTrue(gle)
 
+	def test_gle_in_transaction_currency(self):
+		# create multi currency sales invoice with 2 items with same income account
+		si = create_sales_invoice(
+			customer="_Test Customer USD",
+			debit_to="_Test Receivable USD - _TC",
+			currency="USD",
+			conversion_rate=50,
+			do_not_submit=True,
+		)
+		# add 2nd item with same income account
+		si.append(
+			"items",
+			{
+				"item_code": "_Test Item",
+				"qty": 1,
+				"rate": 80,
+				"income_account": "Sales - _TC",
+				"cost_center": "_Test Cost Center - _TC",
+			},
+		)
+		si.submit()
+
+		gl_entries = frappe.db.sql(
+			"""select transaction_currency, transaction_exchange_rate,
+			debit_in_transaction_currency, credit_in_transaction_currency
+			from `tabGL Entry`
+			where voucher_type='Sales Invoice' and voucher_no=%s and account = 'Sales - _TC'
+			order by account asc""",
+			si.name,
+			as_dict=1,
+		)
+
+		expected_gle = {
+			"transaction_currency": "USD",
+			"transaction_exchange_rate": 50,
+			"debit_in_transaction_currency": 0,
+			"credit_in_transaction_currency": 180,
+		}
+
+		for gle in gl_entries:
+			for field in expected_gle:
+				self.assertEqual(expected_gle[field], gle[field])
+
 	def test_invoice_exchange_rate(self):
 		si = create_sales_invoice(
 			customer="_Test Customer USD",

erpnext/accounts/general_ledger.py

@@ -238,10 +238,16 @@ def merge_similar_entries(gl_map, precision=None):
 			same_head.debit_in_account_currency = flt(same_head.debit_in_account_currency) + flt(
 				entry.debit_in_account_currency
 			)
+			same_head.debit_in_transaction_currency = flt(same_head.debit_in_transaction_currency) + flt(
+				entry.debit_in_transaction_currency
+			)
 			same_head.credit = flt(same_head.credit) + flt(entry.credit)
 			same_head.credit_in_account_currency = flt(same_head.credit_in_account_currency) + flt(
 				entry.credit_in_account_currency
 			)
+			same_head.credit_in_transaction_currency = flt(same_head.credit_in_transaction_currency) + flt(
+				entry.credit_in_transaction_currency
+			)
 		else:
 			merged_gl_map.append(entry)