fix: validate product bundle for existing transactions before deletion (#25978)

erpnext/selling/doctype/product_bundle/product_bundle.py

@@ -4,6 +4,8 @@
 from __future__ import unicode_literals
 import frappe
 
+from frappe.utils import get_link_to_form
+
 from frappe import _
 
 from frappe.model.document import Document
@@ -18,6 +20,27 @@ class ProductBundle(Document):
 		from erpnext.utilities.transaction_base import validate_uom_is_integer
 		validate_uom_is_integer(self, "uom", "qty")
 
+	def on_trash(self):
+		linked_doctypes = ["Delivery Note", "Sales Invoice", "POS Invoice", "Purchase Receipt", "Purchase Invoice",
+			"Stock Entry", "Stock Reconciliation", "Sales Order", "Purchase Order", "Material Request"]
+
+		invoice_links = []
+		for doctype in linked_doctypes:
+			item_doctype = doctype + " Item"
+
+			if doctype == "Stock Entry":
+				item_doctype = doctype + " Detail"
+
+			invoices = frappe.db.get_all(item_doctype, {"item_code": self.new_item_code, "docstatus": 1}, ["parent"])
+
+			for invoice in invoices:
+				invoice_links.append(get_link_to_form(doctype, invoice['parent']))
+
+		if len(invoice_links):
+			frappe.throw(
+				"This Product Bundle is linked with {0}. You will have to cancel these documents in order to delete this Product Bundle"
+				.format(", ".join(invoice_links)), title=_("Not Allowed"))
+
 	def validate_main_item(self):
 		"""Validates, main Item is not a stock item"""
 		if frappe.db.get_value("Item", self.new_item_code, "is_stock_item"):