fix: Unable to create payment request against purchase invoice (frapp…

…e#34762)

fix: Unable to create payment request against purchase invoice (frappe#34762)

(cherry picked from commit 91a2660)

Co-authored-by: Deepesh Garg <deepeshgarg6@gmail.com>

erpnext/accounts/doctype/payment_request/payment_request.py

@@ -497,7 +497,7 @@ def get_amount(ref_doc, payment_account=None):
 	if dt in ["Sales Order", "Purchase Order"]:
 		grand_total = flt(ref_doc.rounded_total) or flt(ref_doc.grand_total)
 	elif dt in ["Sales Invoice", "Purchase Invoice"]:
-		if not ref_doc.is_pos:
+		if not ref_doc.get("is_pos"):
 			if ref_doc.party_account_currency == ref_doc.currency:
 				grand_total = flt(ref_doc.outstanding_amount)
 			else:

erpnext/accounts/doctype/payment_request/test_payment_request.py

@@ -6,6 +6,7 @@
 import frappe
 
 from erpnext.accounts.doctype.payment_request.payment_request import make_payment_request
+from erpnext.accounts.doctype.purchase_invoice.test_purchase_invoice import make_purchase_invoice
 from erpnext.accounts.doctype.sales_invoice.test_sales_invoice import create_sales_invoice
 from erpnext.selling.doctype.sales_order.test_sales_order import make_sales_order
 from erpnext.setup.utils import get_exchange_rate
@@ -74,6 +75,29 @@ def test_payment_request_linkings(self):
 		self.assertEqual(pr.reference_name, si_usd.name)
 		self.assertEqual(pr.currency, "USD")
 
+	def test_payment_entry_against_purchase_invoice(self):
+		si_usd = make_purchase_invoice(
+			customer="_Test Supplier USD",
+			debit_to="_Test Payable USD - _TC",
+			currency="USD",
+			conversion_rate=50,
+		)
+
+		pr = make_payment_request(
+			dt="Purchase Invoice",
+			dn=si_usd.name,
+			recipient_id="user@example.com",
+			mute_email=1,
+			payment_gateway_account="_Test Gateway - USD",
+			submit_doc=1,
+			return_doc=1,
+		)
+
+		pe = pr.create_payment_entry()
+		pr.load_from_db()
+
+		self.assertEqual(pr.status, "Paid")
+
 	def test_payment_entry(self):
 		frappe.db.set_value(
 			"Company", "_Test Company", "exchange_gain_loss_account", "_Test Exchange Gain/Loss - _TC"