From b74db6f2b8070f0ab79258faa533ce12d12ee851 Mon Sep 17 00:00:00 2001
From: Deepesh Garg <deepeshgarg6@gmail.com>
Date: Thu, 12 Aug 2021 17:37:38 +0530
Subject: [PATCH 1/2] fix: Cascade deletion for Company

---
 erpnext/hooks.py                         |  3 +++
 erpnext/regional/india/utils.py          | 15 ++++++++++++++-
 erpnext/setup/doctype/company/company.py |  4 ++++
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index 1ba752a1464..7e0e70924fd 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -300,6 +300,9 @@ 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 a4466e78f28..62c0187268b 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -849,4 +849,17 @@ def get_depreciation_amount(asset, depreciable_value, row):
 
 		depreciation_amount = flt(depreciable_value * (flt(rate_of_depreciation) / 100))
 
-	return depreciation_amount
\ No newline at end of file
+	return depreciation_amount
+
+def delete_gst_settings_for_company(doc, method):
+	if doc.country != 'India':
+		return
+
+	gst_settings = frappe.get_doc("GST Settings")
+
+	for d in reversed(gst_settings.get('gst_accounts')):
+		if d.company == doc.name:
+			gst_settings.remove(d)
+
+	gst_settings.save()
+
diff --git a/erpnext/setup/doctype/company/company.py b/erpnext/setup/doctype/company/company.py
index 8755125c810..34ee1a50f9f 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)

From 3d039d0fac0830bc630a2f998dc44a3baa576907 Mon Sep 17 00:00:00 2001
From: Deepesh Garg <deepeshgarg6@gmail.com>
Date: Thu, 12 Aug 2021 18:18:03 +0530
Subject: [PATCH 2/2] fix: Store records to delete in a separate list

---
 erpnext/regional/india/utils.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/erpnext/regional/india/utils.py b/erpnext/regional/india/utils.py
index 62c0187268b..746e5bf5911 100644
--- a/erpnext/regional/india/utils.py
+++ b/erpnext/regional/india/utils.py
@@ -856,10 +856,14 @@ def delete_gst_settings_for_company(doc, method):
 		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:
-			gst_settings.remove(d)
+			records_to_delete.append(d)
+
+	for d in records_to_delete:
+		gst_settings.remove(d)
 
 	gst_settings.save()