From 8355af6dcf6a6e770c354133e1f08012ad9bdfc9 Mon Sep 17 00:00:00 2001
From: Deepesh Garg <deepeshgarg6@gmail.com>
Date: Tue, 12 Oct 2021 12:44:40 +0530
Subject: [PATCH] fix: Incorrect maximum loan amount update

---
 .../loan_management/doctype/loan/loan.json    |  3 +--
 erpnext/loan_management/doctype/loan/loan.py  | 25 ++++++++++++-------
 .../loan_application/loan_application.py      |  7 +++---
 3 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/erpnext/loan_management/doctype/loan/loan.json b/erpnext/loan_management/doctype/loan/loan.json
index c9f23ca4df..5979992bbe 100644
--- a/erpnext/loan_management/doctype/loan/loan.json
+++ b/erpnext/loan_management/doctype/loan/loan.json
@@ -334,7 +334,6 @@
   },
   {
    "depends_on": "eval:doc.is_secured_loan",
-   "fetch_from": "loan_application.maximum_loan_amount",
    "fieldname": "maximum_loan_amount",
    "fieldtype": "Currency",
    "label": "Maximum Loan Amount",
@@ -360,7 +359,7 @@
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2021-04-19 18:10:32.360818",
+ "modified": "2021-10-12 18:10:32.360818",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan",
diff --git a/erpnext/loan_management/doctype/loan/loan.py b/erpnext/loan_management/doctype/loan/loan.py
index 7dbd42297e..0f2c3cfdfc 100644
--- a/erpnext/loan_management/doctype/loan/loan.py
+++ b/erpnext/loan_management/doctype/loan/loan.py
@@ -137,16 +137,23 @@ class Loan(AccountsController):
 			frappe.throw(_("Loan amount is mandatory"))
 
 	def link_loan_security_pledge(self):
-		if self.is_secured_loan:
-			loan_security_pledge = frappe.db.get_value('Loan Security Pledge', {'loan_application': self.loan_application},
-				'name')
+		if self.is_secured_loan and self.loan_application:
+			maximum_loan_value = frappe.db.get_value('Loan Security Pledge',
+				{
+					'loan_application': self.loan_application,
+					'status': 'Requested'
+				},
+				'sum(maximum_loan_value)'
+			)
 
-			if loan_security_pledge:
-				frappe.db.set_value('Loan Security Pledge', loan_security_pledge, {
-					'loan': self.name,
-					'status': 'Pledged',
-					'pledge_time': now_datetime()
-				})
+			if maximum_loan_value:
+				frappe.db.sql("""
+					UPDATE `tabLoan Security Pledge`
+					SET loan = %s, pledge_time = %s, status = 'Pledged'
+					WHERE status = 'Requested' and loan_application = %s
+				""", (self.name, now_datetime(), self.loan_application))
+
+				self.db_set('maximum_loan_amount', maximum_loan_value)
 
 	def unlink_loan_security_pledge(self):
 		pledges = frappe.get_all('Loan Security Pledge', fields=['name'], filters={'loan': self.name})
diff --git a/erpnext/loan_management/doctype/loan_application/loan_application.py b/erpnext/loan_management/doctype/loan_application/loan_application.py
index e492920abb..66a3be3513 100644
--- a/erpnext/loan_management/doctype/loan_application/loan_application.py
+++ b/erpnext/loan_management/doctype/loan_application/loan_application.py
@@ -130,10 +130,11 @@ class LoanApplication(Document):
 def create_loan(source_name, target_doc=None, submit=0):
 	def update_accounts(source_doc, target_doc, source_parent):
 		account_details = frappe.get_all("Loan Type",
-		 fields=["mode_of_payment", "payment_account","loan_account", "interest_income_account", "penalty_income_account"],
-		 filters = {'name': source_doc.loan_type}
-		)[0]
+			fields=["mode_of_payment", "payment_account","loan_account", "interest_income_account", "penalty_income_account"],
+		 	filters = {'name': source_doc.loan_type})[0]
 
+		if source_doc.is_secured_loan:
+			target_doc.maximum_loan_amount = 0
 
 		target_doc.mode_of_payment = account_details.mode_of_payment
 		target_doc.payment_account = account_details.payment_account