fix: deduplicate gain/loss JE creation for journals as payment

erpnext/accounts/doctype/payment_reconciliation/payment_reconciliation.py

@@ -116,7 +116,7 @@ def get_jv_entries(self):
 				"Journal Entry" as reference_type, t1.name as reference_name,
 				t1.posting_date, t1.remark as remarks, t2.name as reference_row,
 				{dr_or_cr} as amount, t2.is_advance, t2.exchange_rate,
-				t2.account_currency as currency
+				t2.account_currency as currency, t2.cost_center as cost_center
 			from
 				`tabJournal Entry` t1, `tabJournal Entry Account` t2
 			where
@@ -209,6 +209,7 @@ def get_dr_or_cr_notes(self):
 								"amount": -(inv.outstanding_in_account_currency),
 								"posting_date": inv.posting_date,
 								"currency": inv.currency,
+								"cost_center": inv.cost_center,
 							}
 						)
 					)
@@ -357,6 +358,7 @@ def get_allocated_entry(self, pay, inv, allocated_amount):
 				"allocated_amount": allocated_amount,
 				"difference_amount": pay.get("difference_amount"),
 				"currency": inv.get("currency"),
+				"cost_center": pay.get("cost_center"),
 			}
 		)
 
@@ -431,6 +433,7 @@ def get_payment_details(self, row, dr_or_cr):
 				"allocated_amount": flt(row.get("allocated_amount")),
 				"difference_amount": flt(row.get("difference_amount")),
 				"difference_account": row.get("difference_account"),
+				"cost_center": row.get("cost_center"),
 			}
 		)
 
@@ -603,7 +606,7 @@ def reconcile_dr_cr_note(dr_cr_notes, company):
 						inv.dr_or_cr: abs(inv.allocated_amount),
 						"reference_type": inv.against_voucher_type,
 						"reference_name": inv.against_voucher,
-						"cost_center": erpnext.get_default_cost_center(company),
+						"cost_center": inv.cost_center or erpnext.get_default_cost_center(company),
 						"exchange_rate": inv.exchange_rate,
 						"user_remark": f"{fmt_money(flt(inv.allocated_amount), currency=company_currency)} against {inv.against_voucher}",
 					},
@@ -618,7 +621,7 @@ def reconcile_dr_cr_note(dr_cr_notes, company):
 						),
 						"reference_type": inv.voucher_type,
 						"reference_name": inv.voucher_no,
-						"cost_center": erpnext.get_default_cost_center(company),
+						"cost_center": inv.cost_center or erpnext.get_default_cost_center(company),
 						"exchange_rate": inv.exchange_rate,
 						"user_remark": f"{fmt_money(flt(inv.allocated_amount), currency=company_currency)} from {inv.voucher_no}",
 					},
@@ -657,4 +660,5 @@ def reconcile_dr_cr_note(dr_cr_notes, company):
 				inv.against_voucher_type,
 				inv.against_voucher,
 				None,
+				inv.cost_center,
 			)

erpnext/accounts/doctype/payment_reconciliation_allocation/payment_reconciliation_allocation.json

@@ -22,7 +22,8 @@
   "column_break_7",
   "difference_account",
   "exchange_rate",
-  "currency"
+  "currency",
+  "cost_center"
  ],
  "fields": [
   {
@@ -144,11 +145,17 @@
    "fieldtype": "Float",
    "label": "Exchange Rate",
    "read_only": 1
+  },
+  {
+   "fieldname": "cost_center",
+   "fieldtype": "Link",
+   "label": "Cost Center",
+   "options": "Cost Center"
   }
  ],
  "istable": 1,
  "links": [],
- "modified": "2022-12-24 21:01:14.882747",
+ "modified": "2023-09-03 07:52:33.684217",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Payment Reconciliation Allocation",

erpnext/accounts/doctype/payment_reconciliation_payment/payment_reconciliation_payment.json

@@ -16,7 +16,8 @@
   "sec_break1",
   "remark",
   "currency",
-  "exchange_rate"
+  "exchange_rate",
+  "cost_center"
  ],
  "fields": [
   {
@@ -98,11 +99,17 @@
    "fieldtype": "Float",
    "hidden": 1,
    "label": "Exchange Rate"
+  },
+  {
+   "fieldname": "cost_center",
+   "fieldtype": "Link",
+   "label": "Cost Center",
+   "options": "Cost Center"
   }
  ],
  "istable": 1,
  "links": [],
- "modified": "2022-11-08 18:18:36.268760",
+ "modified": "2023-09-03 07:43:29.965353",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Payment Reconciliation Payment",

erpnext/accounts/utils.py

@@ -474,10 +474,12 @@ def reconcile_against_document(args, skip_ref_details_update_for_pe=False):  # n
 
 			# update ref in advance entry
 			if voucher_type == "Journal Entry":
-				update_reference_in_journal_entry(entry, doc, do_not_save=True)
+				referenced_row = update_reference_in_journal_entry(entry, doc, do_not_save=False)
 				# advance section in sales/purchase invoice and reconciliation tool,both pass on exchange gain/loss
 				# amount and account in args
-				doc.make_exchange_gain_loss_journal(args)
+				# referenced_row is used to deduplicate gain/loss journal
+				entry.update({"referenced_row": referenced_row})
+				doc.make_exchange_gain_loss_journal([entry])
 			else:
 				update_reference_in_payment_entry(
 					entry, doc, do_not_save=True, skip_ref_details_update_for_pe=skip_ref_details_update_for_pe
@@ -627,6 +629,8 @@ def update_reference_in_journal_entry(d, journal_entry, do_not_save=False):
 	if not do_not_save:
 		journal_entry.save(ignore_permissions=True)
 
+	return new_row.name
+
 
 def update_reference_in_payment_entry(
 	d, payment_entry, do_not_save=False, skip_ref_details_update_for_pe=False
@@ -1750,6 +1754,7 @@ def query_for_outstanding(self):
 				ple.posting_date,
 				ple.due_date,
 				ple.account_currency.as_("currency"),
+				ple.cost_center.as_("cost_center"),
 				Sum(ple.amount).as_("amount"),
 				Sum(ple.amount_in_account_currency).as_("amount_in_account_currency"),
 			)
@@ -1812,6 +1817,7 @@ def query_for_outstanding(self):
 				).as_("paid_amount_in_account_currency"),
 				Table("vouchers").due_date,
 				Table("vouchers").currency,
+				Table("vouchers").cost_center.as_("cost_center"),
 			)
 			.where(Criterion.all(filter_on_outstanding_amount))
 		)
@@ -1895,12 +1901,14 @@ def create_gain_loss_journal(
 	ref2_dt,
 	ref2_dn,
 	ref2_detail_no,
+	cost_center,
 ) -> str:
 	journal_entry = frappe.new_doc("Journal Entry")
 	journal_entry.voucher_type = "Exchange Gain Or Loss"
 	journal_entry.company = company
 	journal_entry.posting_date = nowdate()
 	journal_entry.multi_currency = 1
+	journal_entry.is_system_generated = True
 
 	party_account_currency = frappe.get_cached_value("Account", party_account, "account_currency")
 
@@ -1919,7 +1927,7 @@ def create_gain_loss_journal(
 			"party": party,
 			"account_currency": party_account_currency,
 			"exchange_rate": 0,
-			"cost_center": erpnext.get_default_cost_center(company),
+			"cost_center": cost_center or erpnext.get_default_cost_center(company),
 			"reference_type": ref1_dt,
 			"reference_name": ref1_dn,
 			"reference_detail_no": ref1_detail_no,
@@ -1935,7 +1943,7 @@ def create_gain_loss_journal(
 			"account": gain_loss_account,
 			"account_currency": gain_loss_account_currency,
 			"exchange_rate": 1,
-			"cost_center": erpnext.get_default_cost_center(company),
+			"cost_center": cost_center or erpnext.get_default_cost_center(company),
 			"reference_type": ref2_dt,
 			"reference_name": ref2_dn,
 			"reference_detail_no": ref2_detail_no,

erpnext/controllers/accounts_controller.py

@@ -1023,6 +1023,44 @@ def make_precision_loss_gl_entry(self, gl_entries):
 				)
 			)
 
+	def gain_loss_journal_already_booked(
+		self,
+		gain_loss_account,
+		exc_gain_loss,
+		ref2_dt,
+		ref2_dn,
+		ref2_detail_no,
+	) -> bool:
+		"""
+		Check if gain/loss is booked
+		"""
+		if res := frappe.db.get_all(
+			"Journal Entry Account",
+			filters={
+				"docstatus": 1,
+				"account": gain_loss_account,
+				"reference_type": ref2_dt,  # this will be Journal Entry
+				"reference_name": ref2_dn,
+				"reference_detail_no": ref2_detail_no,
+			},
+			pluck="parent",
+		):
+			# deduplicate
+			res = list({x for x in res})
+			if exc_vouchers := frappe.db.get_all(
+				"Journal Entry",
+				filters={"name": ["in", res], "voucher_type": "Exchange Gain Or Loss"},
+				fields=["voucher_type", "total_debit", "total_credit"],
+			):
+				booked_voucher = exc_vouchers[0]
+				if (
+					booked_voucher.total_debit == exc_gain_loss
+					and booked_voucher.total_credit == exc_gain_loss
+					and booked_voucher.voucher_type == "Exchange Gain Or Loss"
+				):
+					return True
+		return False
+
 	def make_exchange_gain_loss_journal(self, args: dict = None) -> None:
 		"""
 		Make Exchange Gain/Loss journal for Invoices and Payments
@@ -1051,27 +1089,35 @@ def make_exchange_gain_loss_journal(self, args: dict = None) -> None:
 
 							reverse_dr_or_cr = "debit" if dr_or_cr == "credit" else "credit"
 
-							je = create_gain_loss_journal(
-								self.company,
-								arg.get("party_type"),
-								arg.get("party"),
-								party_account,
+							if not self.gain_loss_journal_already_booked(
 								gain_loss_account,
 								difference_amount,
-								dr_or_cr,
-								reverse_dr_or_cr,
-								arg.get("against_voucher_type"),
-								arg.get("against_voucher"),
-								arg.get("idx"),
 								self.doctype,
 								self.name,
-								arg.get("idx"),
-							)
-							frappe.msgprint(
-								_("Exchange Gain/Loss amount has been booked through {0}").format(
-									get_link_to_form("Journal Entry", je)
+								arg.get("referenced_row"),
+							):
+								je = create_gain_loss_journal(
+									self.company,
+									arg.get("party_type"),
+									arg.get("party"),
+									party_account,
+									gain_loss_account,
+									difference_amount,
+									dr_or_cr,
+									reverse_dr_or_cr,
+									arg.get("against_voucher_type"),
+									arg.get("against_voucher"),
+									arg.get("idx"),
+									self.doctype,
+									self.name,
+									arg.get("referenced_row"),
+									arg.get("cost_center"),
+								)
+								frappe.msgprint(
+									_("Exchange Gain/Loss amount has been booked through {0}").format(
+										get_link_to_form("Journal Entry", je)
+									)
 								)
-							)
 
 			if self.get("doctype") == "Payment Entry":
 				# For Payment Entry, exchange_gain_loss field in the `references` table is the trigger for journal creation
@@ -1144,6 +1190,7 @@ def make_exchange_gain_loss_journal(self, args: dict = None) -> None:
 							self.doctype,
 							self.name,
 							d.idx,
+							self.cost_center,
 						)
 						frappe.msgprint(
 							_("Exchange Gain/Loss amount has been booked through {0}").format(