delete customer account on deletion of customer record

erpnext/accounts/doctype/account/account.py

@@ -169,6 +169,13 @@ class DocType:
 		get_obj('Account', self.doc.parent_account).update_balance(fy, period_det, flag)
 		msgprint('Balances updated')
 	
+	def validate_mandatory(self):
+		if not self.doc.debit_or_credit:
+			msgprint("Debit or Credit field is mandatory", raise_exception=1)
+		if not self.doc.is_pl_account:
+			msgprint("Is PL Account field is mandatory", raise_exception=1)
+
+
 	# VALIDATE
 	# ==================================================================
 	def validate(self): 
@@ -177,6 +184,7 @@ class DocType:
 		self.validate_parent()
 		self.validate_duplicate_account()
 		self.validate_root_details()
+		self.validate_mandatory()
 	
 		# Defaults
 		if not self.doc.parent_account:

erpnext/selling/doctype/customer/customer.py

@@ -239,12 +239,20 @@ class DocType:
 		webnotes.conn.sql("""\
 			delete from `tabCommunication`
 			where customer = %s and supplier is null""", self.doc.name)
-	
+			
-# ******************************************************* on trash *********************************************************
+	def delete_customer_account(self):
+		"""delete customer's ledger if exist and check balance before deletion"""
+		acc = sql("select name from `tabAccount` where master_type = 'Customer' \
+			and master_name = %s and docstatus < 2", self.doc.name)
+		if acc:
+			from webnotes.model import delete_doc
+			delete_doc('Account', acc[0][0])
+
 	def on_trash(self):
 		self.delete_customer_address()
 		self.delete_customer_contact()
 		self.delete_customer_communication()
+		self.delete_customer_account()
 		if self.doc.lead_name:
 			sql("update `tabLead` set status='Interested' where name=%s",self.doc.lead_name)