From 2b2572b9b997eaeaae86e23f8b74803db85daf5a Mon Sep 17 00:00:00 2001
From: Deepesh Garg <42651287+deepeshgarg007@users.noreply.github.com>
Date: Fri, 20 Aug 2021 14:40:12 +0530
Subject: [PATCH] fix: Cascade deletion for Company (#26923)

* fix: Cascade deletion for Company
---
 erpnext/hooks.py                         |  3 +++
 erpnext/regional/india/utils.py          | 17 +++++++++++++++++
 erpnext/setup/doctype/company/company.py |  4 ++++
 3 files changed, 24 insertions(+)

diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index 73831bf9af..74977cd8bc 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -308,6 +308,9 @@ doc_events = {
 	},
 	('Quotation', 'Sales Order', 'Sales Invoice'): {
 		'validate': ["erpnext.erpnext_integrations.taxjar_integration.set_sales_tax"]
+	},
+	"Company": {
+		"on_trash": "erpnext.regional.india.utils.delete_gst_settings_for_company"
 	}
 }
 
diff --git a/erpnext/regional/india/utils.py b/erpnext/regional/india/utils.py
index 949733e0ad..4e4dcf8585 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -871,3 +871,20 @@ def set_item_tax_from_hsn_code(item):
 				'tax_category': tax.tax_category,
 				'valid_from': tax.valid_from
 			})
+
+def delete_gst_settings_for_company(doc, method):
+	if doc.country != 'India':
+		return
+
+	gst_settings = frappe.get_doc("GST Settings")
+	records_to_delete = []
+
+	for d in reversed(gst_settings.get('gst_accounts')):
+		if d.company == doc.name:
+			records_to_delete.append(d)
+
+	for d in records_to_delete:
+		gst_settings.remove(d)
+
+	gst_settings.save()
+
diff --git a/erpnext/setup/doctype/company/company.py b/erpnext/setup/doctype/company/company.py
index 54c67538ae..45d5ce0c1c 100644
--- a/erpnext/setup/doctype/company/company.py
+++ b/erpnext/setup/doctype/company/company.py
@@ -393,6 +393,10 @@ class Company(NestedSet):
 		frappe.db.sql("delete from `tabPurchase Taxes and Charges Template` where company=%s", self.name)
 		frappe.db.sql("delete from `tabItem Tax Template` where company=%s", self.name)
 
+		# delete Process Deferred Accounts if no GL Entry found
+		if not frappe.db.get_value('GL Entry', {'company': self.name}):
+			frappe.db.sql("delete from `tabProcess Deferred Accounting` where company=%s", self.name)
+
 @frappe.whitelist()
 def enqueue_replace_abbr(company, old, new):
 	kwargs = dict(queue="long", company=company, old=old, new=new)