perf: skip delink_original_entry during cancellation when Immutable Ledger is enabled (#55130)

* perf: get payment ledger and remove update from delink when immutable ledger is enabled

* revert: changes of get_payment_ledger_entries

* perf: skip delink_original_entry during cancellation when Immutable Ledger is enabled

* test: for immutable ledger

* test: add posting_date in create_sales_invoice

* fix: link validation err with immutable ledger on

* test: update testcase of the immutable ledger

* refactor(test): simpler test for immutable invariants

---------

Co-authored-by: ruthra kumar <ruthra@erpnext.com>
(cherry picked from commit 9eeccecd30)

# Conflicts:
#	erpnext/accounts/general_ledger.py

erpnext/accounts/doctype/payment_ledger_entry/test_payment_ledger_entry.py

@@ -3,7 +3,8 @@
 
 import frappe
 from frappe import qb
-from frappe.utils import nowdate
+from frappe.query_builder.functions import Count, Sum
+from frappe.utils import add_days, nowdate
 
 from erpnext.accounts.doctype.payment_entry.payment_entry import get_payment_entry
 from erpnext.accounts.doctype.payment_entry.test_payment_entry import create_payment_entry
@@ -90,6 +91,7 @@ class TestPaymentLedgerEntry(ERPNextTestSuite):
 			posting_date = nowdate()
 
 		sinv = create_sales_invoice(
+			posting_date=posting_date,
 			qty=qty,
 			rate=rate,
 			company=self.company,
@@ -531,3 +533,82 @@ class TestPaymentLedgerEntry(ERPNextTestSuite):
 		# with references removed, deletion should be possible
 		so.delete()
 		self.assertRaises(frappe.DoesNotExistError, frappe.get_doc, so.doctype, so.name)
+
+	@ERPNextTestSuite.change_settings(
+		"Accounts Settings",
+		{"enable_immutable_ledger": 1},
+	)
+	def test_reverse_entries_on_cancel_for_immutable_ledger(self):
+		invoice_posting_date = add_days(nowdate(), -5)
+		gle = qb.DocType("GL Entry")
+		ple = qb.DocType("Payment Ledger Entry")
+
+		si = self.create_sales_invoice(qty=1, rate=100, posting_date=invoice_posting_date)
+
+		gles_before = (
+			qb.from_(gle)
+			.select(
+				Count(gle.name),
+			)
+			.where((gle.voucher_type == si.doctype) & (gle.voucher_no == si.name) & (gle.is_cancelled == 0))
+			.run()[0][0]
+		)
+		ples_before = (
+			qb.from_(ple)
+			.select(
+				Count(ple.name),
+			)
+			.where((ple.voucher_type == si.doctype) & (ple.voucher_no == si.name) & (ple.delinked.eq(0)))
+			.run()[0][0]
+		)
+
+		si.cancel()
+
+		gles_after = (
+			qb.from_(gle)
+			.select(Count(gle.account))
+			.where((gle.voucher_type == si.doctype) & (gle.voucher_no == si.name) & (gle.is_cancelled == 0))
+			.run()[0][0]
+		)
+		self.assertEqual(gles_after, gles_before * 2)
+
+		ples_after = (
+			qb.from_(ple)
+			.select(
+				Count(ple.name),
+			)
+			.where((ple.voucher_type == si.doctype) & (ple.voucher_no == si.name) & (ple.delinked.eq(0)))
+			.run()[0][0]
+		)
+		self.assertEqual(ples_after, ples_before * 2)
+
+		# assert debit/credit are reversed
+		gl_entries = (
+			qb.from_(gle)
+			.select(gle.account, Sum(gle.debit).as_("total_debit"), Sum(gle.credit).as_("total_credit"))
+			.where((gle.voucher_type == si.doctype) & (gle.voucher_no == si.name) & (gle.is_cancelled == 0))
+			.groupby(gle.account)
+			.run(as_dict=True)
+		)
+		for gl in gl_entries:
+			with self.subTest(gl=gl):
+				self.assertEqual(gl.total_debit, gl.total_credit)
+
+		# assert amounts are reversed
+		pl_entries = (
+			qb.from_(ple)
+			.select(ple.account, Sum(ple.amount).as_("total_amount"))
+			.where((ple.voucher_type == si.doctype) & (ple.voucher_no == si.name) & (ple.delinked == 0))
+			.groupby(ple.account)
+			.run(as_dict=True)
+		)
+		for pl in pl_entries:
+			with self.subTest(pl=pl):
+				self.assertEqual(pl.total_amount, 0)
+
+		self.assertFalse(
+			frappe.db.exists(
+				"Payment Ledger Entry",
+				{"voucher_type": si.doctype, "voucher_no": si.name, "delinked": 1},
+			)
+		)

erpnext/accounts/general_ledger.py

@@ -431,6 +431,8 @@ def make_entry(args, adv_adj, update_outstanding, from_repost=False):
 	gle.flags.adv_adj = adv_adj
 	gle.flags.update_outstanding = update_outstanding or "Yes"
 	gle.flags.notify_update = False
+	if gle.is_cancelled or is_immutable_ledger_enabled():
+		gle.flags.ignore_links = True
 	gle.submit()
 
 	if (

erpnext/accounts/utils.py

@@ -2130,8 +2130,9 @@ def create_payment_ledger_entry(
 			ple = frappe.get_doc(entry)
 
 			if cancel:
-				delink_original_entry(ple, partial_cancel=partial_cancel)
-				if is_immutable_ledger_enabled():
+				if not is_immutable_ledger_enabled():
+					delink_original_entry(ple, partial_cancel=partial_cancel)
+				else:
 					ple.delinked = 0
 					ple.posting_date = frappe.form_dict.get("posting_date") or getdate()
 
@@ -2220,6 +2221,7 @@ def delink_original_entry(pl_entry, partial_cancel=False):
 			qb.update(ple)
 			.set(ple.modified, now())
 			.set(ple.modified_by, frappe.session.user)
+			.set(ple.delinked, True)
 			.where(
 				(ple.company == pl_entry.company)
 				& (ple.account_type == pl_entry.account_type)
@@ -2236,9 +2238,6 @@ def delink_original_entry(pl_entry, partial_cancel=False):
 		if partial_cancel:
 			query = query.where(ple.voucher_detail_no == pl_entry.voucher_detail_no)
 
-		if not is_immutable_ledger_enabled():
-			query = query.set(ple.delinked, True)
-
 		query.run()