fix: Calculate monthly repayment precisely to the fraction of a curre…

…ncy, turning rounding up into an optional feature.

lending/loan_management/doctype/loan/loan.js

@@ -107,6 +107,11 @@ frappe.ui.form.on('Loan', {
 		frm.trigger("toggle_fields");
 	},
 
+	is_term_loan: function(frm) {
+		frm.doc.repayment_method = frm.doc.repayment_schedule_type = "";
+		frm.doc.monthly_repayment_amount = frm.doc.repayment_periods = "";
+	},
+
 	repayment_schedule_type: function(frm) {
 		if (frm.doc.repayment_schedule_type == "Pro-rated calendar months") {
 			frm.set_df_property("repayment_start_date", "label", "Interest Calculation Start Date");
@@ -115,13 +120,6 @@ frappe.ui.form.on('Loan', {
 		}
 	},
 
-	loan_type: function(frm) {
-		frm.toggle_reqd("repayment_method", frm.doc.is_term_loan);
-		frm.toggle_display("repayment_method", frm.doc.is_term_loan);
-		frm.toggle_display("repayment_periods", frm.doc.is_term_loan);
-	},
-
-
 	make_loan_disbursement: function (frm) {
 		frappe.call({
 			args: {
@@ -245,7 +243,7 @@ frappe.ui.form.on('Loan', {
 				callback: function (r) {
 					if (!r.exc && r.message) {
 
-						let loan_fields = ["loan_type", "loan_amount", "repayment_method",
+						let loan_fields = ["loan_type", "loan_amount", "repayment_method", "repayment_round_up",
 							"monthly_repayment_amount", "repayment_periods", "rate_of_interest", "is_secured_loan"]
 
 						loan_fields.forEach(field => {
@@ -269,13 +267,4 @@ frappe.ui.form.on('Loan', {
 			});
 		}
 	},
-
-	repayment_method: function (frm) {
-		frm.trigger("toggle_fields")
-	},
-
-	toggle_fields: function (frm) {
-		frm.toggle_enable("monthly_repayment_amount", frm.doc.repayment_method == "Repay Fixed Amount per Period")
-		frm.toggle_enable("repayment_periods", frm.doc.repayment_method == "Repay Over Number of Periods")
-	}
-});
+});

lending/loan_management/doctype/loan/loan.json

@@ -30,6 +30,7 @@
   "maximum_loan_amount",
   "repayment_method",
   "repayment_periods",
+    "repayment_round_up",
   "monthly_repayment_amount",
   "repayment_start_date",
   "is_term_loan",
@@ -179,13 +180,23 @@
    "fieldname": "repayment_method",
    "fieldtype": "Select",
    "label": "Repayment Method",
-   "options": "\nRepay Fixed Amount per Period\nRepay Over Number of Periods"
+    "mandatory_depends_on": "is_term_loan",
+    "options": "Repay Fixed Amount per Period\nRepay Over Number of Periods"
   },
   {
    "depends_on": "is_term_loan",
    "fieldname": "repayment_periods",
    "fieldtype": "Int",
-   "label": "Repayment Period in Months"
+    "label": "Repayment Period in Months",
+    "mandatory_depends_on": "eval: doc.repayment_method == 'Repay Over Number of Periods'",
+    "read_only_depends_on": "eval: doc.repayment_method != 'Repay Over Number of Periods'"
+    },
+    {
+    "default": "0",
+    "depends_on": "eval: doc.repayment_method == 'Repay Over Number of Periods'",
+    "fieldname": "repayment_round_up",
+    "fieldtype": "Check",
+    "label": "Round Up"
   },
   {
    "depends_on": "is_term_loan",
@@ -194,7 +205,9 @@
    "fieldname": "monthly_repayment_amount",
    "fieldtype": "Currency",
    "label": "Monthly Repayment Amount",
-   "options": "Company:company:default_currency"
+    "mandatory_depends_on": "eval: doc.repayment_method == 'Repay Fixed Amount per Period'",
+    "options": "Company:company:default_currency",
+    "read_only_depends_on": "eval: doc.repayment_method != 'Repay Fixed Amount per Period'"
   },
   {
    "collapsible": 1,

lending/loan_management/doctype/loan/loan.py

@@ -114,6 +114,7 @@ def make_draft_schedule(self):
 				"repayment_method": self.repayment_method,
 				"repayment_start_date": self.repayment_start_date,
 				"repayment_periods": self.repayment_periods,
+				"repayment_round_up": self.repayment_round_up,
 				"loan_amount": self.loan_amount,
 				"monthly_repayment_amount": self.monthly_repayment_amount,
 				"loan_type": self.loan_type,
@@ -135,6 +136,7 @@ def update_draft_schedule(self):
 					"repayment_periods": self.repayment_periods,
 					"repayment_method": self.repayment_method,
 					"repayment_start_date": self.repayment_start_date,
+					"repayment_round_up": self.repayment_round_up,
 					"posting_date": self.posting_date,
 					"loan_amount": self.loan_amount,
 					"monthly_repayment_amount": self.monthly_repayment_amount,

lending/loan_management/doctype/loan_application/loan_application.js

@@ -12,7 +12,6 @@ frappe.ui.form.on('Loan Application', {
 		}
 	},
 	refresh: function(frm) {
-		frm.trigger("toggle_fields");
 		frm.trigger("add_toolbar_buttons");
 		frm.set_query('loan_type', () => {
 			return {
@@ -22,18 +21,12 @@ frappe.ui.form.on('Loan Application', {
 			};
 		});
 	},
-	repayment_method: function(frm) {
+	is_term_loan: function(frm) {
+		frm.doc.repayment_method = "";
 		frm.doc.repayment_amount = frm.doc.repayment_periods = "";
-		frm.trigger("toggle_fields");
-		frm.trigger("toggle_required");
 	},
-	toggle_fields: function(frm) {
-		frm.toggle_enable("repayment_amount", frm.doc.repayment_method=="Repay Fixed Amount per Period")
-		frm.toggle_enable("repayment_periods", frm.doc.repayment_method=="Repay Over Number of Periods")
-	},
-	toggle_required: function(frm){
-		frm.toggle_reqd("repayment_amount", cint(frm.doc.repayment_method=='Repay Fixed Amount per Period'))
-		frm.toggle_reqd("repayment_periods", cint(frm.doc.repayment_method=='Repay Over Number of Periods'))
+	repayment_method: function(frm) {
+		frm.doc.repayment_amount = frm.doc.repayment_periods = "";
 	},
 	add_toolbar_buttons: function(frm) {
 		if (frm.doc.status == "Approved") {
@@ -85,10 +78,6 @@ frappe.ui.form.on('Loan Application', {
 			}
 		})
 	},
-	is_term_loan: function(frm) {
-		frm.set_df_property('repayment_method', 'hidden', 1 - frm.doc.is_term_loan);
-		frm.set_df_property('repayment_method', 'reqd', frm.doc.is_term_loan);
-	},
 	is_secured_loan: function(frm) {
 		frm.set_df_property('proposed_pledges', 'reqd', frm.doc.is_secured_loan);
 	},

lending/loan_management/doctype/loan_application/loan_application.json

@@ -1,7 +1,7 @@
 {
  "actions": [],
  "autoname": "ACC-LOAP-.YYYY.-.#####",
- "creation": "2019-08-29 17:46:49.201740",
+ "creation": "2023-09-18 18:58:25.087137",
  "doctype": "DocType",
  "editable_grid": 1,
  "engine": "InnoDB",
@@ -26,10 +26,11 @@
   "maximum_loan_amount",
   "repayment_info",
   "repayment_method",
-  "total_payable_amount",
-  "column_break_11",
   "repayment_periods",
+  "repayment_round_up",
   "repayment_amount",
+  "column_break_11",
+  "total_payable_amount",
   "total_payable_interest",
   "amended_from"
  ],
@@ -127,7 +128,8 @@
    "fieldname": "repayment_method",
    "fieldtype": "Select",
    "label": "Repayment Method",
-   "options": "\nRepay Fixed Amount per Period\nRepay Over Number of Periods"
+   "mandatory_depends_on": "eval: doc.is_term_loan == 1",
+   "options": "Repay Fixed Amount per Period\nRepay Over Number of Periods"
   },
   {
    "fetch_from": "loan_type.rate_of_interest",
@@ -149,17 +151,26 @@
    "fieldtype": "Column Break"
   },
   {
-   "depends_on": "repayment_method",
    "fieldname": "repayment_amount",
    "fieldtype": "Currency",
    "label": "Monthly Repayment Amount",
-   "options": "Company:company:default_currency"
+   "mandatory_depends_on": "eval: doc.repayment_method == 'Repay Fixed Amount per Period'",
+   "options": "Company:company:default_currency",
+   "read_only_depends_on": "eval: doc.repayment_method != 'Repay Fixed Amount per Period'"
+  },
+  {
+   "default": "0",
+   "depends_on": "eval: doc.repayment_method == 'Repay Over Number of Periods'",
+   "fieldname": "repayment_round_up",
+   "fieldtype": "Check",
+   "label": "Round Up"
   },
   {
-   "depends_on": "repayment_method",
    "fieldname": "repayment_periods",
    "fieldtype": "Int",
-   "label": "Repayment Period in Months"
+   "label": "Repayment Period in Months",
+   "mandatory_depends_on": "eval: doc.repayment_method == 'Repay Over Number of Periods'",
+   "read_only_depends_on": "eval: doc.repayment_method != 'Repay Over Number of Periods'"
   },
   {
    "fieldname": "total_payable_amount",
@@ -215,7 +226,7 @@
  "index_web_pages_for_search": 1,
  "is_submittable": 1,
  "links": [],
- "modified": "2021-04-19 18:24:40.119647",
+ "modified": "2023-09-18 19:35:16.307804",
  "modified_by": "Administrator",
  "module": "Loan Management",
  "name": "Loan Application",
@@ -276,6 +287,7 @@
  "search_fields": "applicant_type, applicant, loan_type, loan_amount",
  "sort_field": "modified",
  "sort_order": "DESC",
+ "states": [],
  "timeline_field": "applicant",
  "title_field": "applicant",
  "track_changes": 1

lending/loan_management/doctype/loan_application/loan_application.py

@@ -25,6 +25,9 @@
 
 class LoanApplication(Document):
 	def validate(self):
+		if not self.docstatus.is_draft():
+			return
+
 		self.set_pledge_amount()
 		self.set_loan_amount()
 		self.validate_loan_amount()
@@ -38,12 +41,7 @@ def validate(self):
 		self.check_sanctioned_amount_limit()
 
 	def validate_repayment_method(self):
-		if self.repayment_method == "Repay Over Number of Periods" and not self.repayment_periods:
-			frappe.throw(_("Please enter Repayment Periods"))
-
 		if self.repayment_method == "Repay Fixed Amount per Period":
-			if not self.repayment_amount:
-				frappe.throw(_("Please enter repayment Amount"))
 			if self.repayment_amount > self.loan_amount:
 				frappe.throw(_("Monthly Repayment Amount cannot be greater than Loan Amount"))
 
@@ -106,9 +104,10 @@ def get_repayment_details(self):
 
 		if self.is_term_loan:
 			if self.repayment_method == "Repay Over Number of Periods":
-				self.repayment_amount = get_monthly_repayment_amount(
+				amount = get_monthly_repayment_amount(
 					self.loan_amount, self.rate_of_interest, self.repayment_periods
 				)
+				self.repayment_amount = math.ceil(amount) if self.repayment_round_up else amount
 
 			if self.repayment_method == "Repay Fixed Amount per Period":
 				monthly_interest_rate = flt(self.rate_of_interest) / (12 * 100)
@@ -133,8 +132,8 @@ def calculate_payable_amount(self):
 		self.total_payable_interest = 0
 
 		while balance_amount > 0:
-			interest_amount = rounded(balance_amount * flt(self.rate_of_interest) / (12 * 100))
-			balance_amount = rounded(balance_amount + interest_amount - self.repayment_amount)
+			interest_amount = rounded(balance_amount * flt(self.rate_of_interest) / (12 * 100), 2)
+			balance_amount = rounded(balance_amount + interest_amount - self.repayment_amount, 2)
 
 			self.total_payable_interest += interest_amount
 

lending/loan_management/doctype/loan_repayment_schedule/loan_repayment_schedule.json

@@ -17,7 +17,7 @@
   "loan_type",
   "repayment_schedule_type",
   "repayment_method",
-  "repayment_periods",
+  "repayment_round_up",
   "monthly_repayment_amount",
   "repayment_start_date",
   "section_break_6rpg",
@@ -71,6 +71,13 @@
    "label": "Repayment Method",
    "options": "\nRepay Fixed Amount per Period\nRepay Over Number of Periods"
   },
+  {
+   "default": "0",
+   "depends_on": "eval: doc.repayment_method == 'Repay Over Number of Periods'",
+   "fieldname": "repayment_round_up",
+   "fieldtype": "Check",
+   "label": "Round Up"
+  },
   {
    "fieldname": "monthly_repayment_amount",
    "fieldtype": "Currency",
@@ -176,4 +183,4 @@
  "sort_field": "modified",
  "sort_order": "DESC",
  "states": []
-}
+}

lending/loan_management/doctype/loan_repayment_schedule/loan_repayment_schedule.py

@@ -17,9 +17,10 @@ def validate(self):
 
 	def set_missing_fields(self):
 		if self.repayment_method == "Repay Over Number of Periods":
-			self.monthly_repayment_amount = get_monthly_repayment_amount(
+			amount = get_monthly_repayment_amount(
 				self.loan_amount, self.rate_of_interest, self.repayment_periods
 			)
+			self.monthly_repayment_amount = math.ceil(amount) if self.repayment_round_up else amount
 
 	def set_repayment_period(self):
 		if self.repayment_method == "Repay Fixed Amount per Period":
@@ -163,13 +164,12 @@ def add_single_month(date):
 		return add_months(date, 1)
 
 
-def get_monthly_repayment_amount(loan_amount, rate_of_interest, repayment_periods):
-	if rate_of_interest:
-		monthly_interest_rate = flt(rate_of_interest) / (12 * 100)
-		monthly_repayment_amount = math.ceil(
-			(loan_amount * monthly_interest_rate * (1 + monthly_interest_rate) ** repayment_periods)
-			/ ((1 + monthly_interest_rate) ** repayment_periods - 1)
+def get_monthly_repayment_amount(loan_amount, yearly_intrate, periods):
+	if yearly_intrate:
+		monthly_intrate = yearly_intrate / (12 * 100)
+		annuity_factor = (monthly_intrate * (1 + monthly_intrate) ** periods) / (
+			(1 + monthly_intrate) ** periods - 1
 		)
+		return loan_amount * annuity_factor
 	else:
-		monthly_repayment_amount = math.ceil(flt(loan_amount) / repayment_periods)
-	return monthly_repayment_amount
+		return loan_amount / periods