fix: patch to set discount percentange in case of mismatch

(cherry picked from commit f7eda8a156)

erpnext/patches/v15_0/set_additional_discount_percentage.py

@@ -0,0 +1,56 @@
+import frappe
+from frappe import scrub
+from frappe.model.meta import get_field_precision
+from frappe.utils import flt
+
+from erpnext.accounts.report.calculated_discount_mismatch.calculated_discount_mismatch import (
+	DISCOUNT_DOCTYPES,
+	LAST_MODIFIED_DATE_THRESHOLD,
+)
+
+
+def execute():
+	for doctype in DISCOUNT_DOCTYPES:
+		documents = frappe.get_all(
+			doctype,
+			{
+				"docstatus": 0,
+				"modified": [">", LAST_MODIFIED_DATE_THRESHOLD],
+				"discount_amount": ["is", "set"],
+			},
+			[
+				"name",
+				"additional_discount_percentage",
+				"discount_amount",
+				"apply_discount_on",
+				"grand_total",
+				"net_total",
+			],
+		)
+
+		if not documents:
+			continue
+
+		precision = get_field_precision(frappe.get_meta(doctype).get_field("additional_discount_percentage"))
+		mismatched_documents = []
+
+		for doc in documents:
+			discount_applied_on = scrub(doc.apply_discount_on)
+
+			calculated_discount_amount = flt(
+				doc.additional_discount_percentage * doc.get(discount_applied_on) / 100,
+				precision,
+			)
+
+			if calculated_discount_amount != doc.discount_amount:
+				mismatched_documents.append(doc.name)
+
+		if mismatched_documents:
+			frappe.db.set_value(
+				doctype,
+				{
+					"name": ["in", mismatched_documents],
+				},
+				"additional_discount_percentage",
+				0,
+			)