chore: asset finance books validation (backport #36979) (#36981)

* chore: asset finance books validation (#36979)

(cherry picked from commit 0077659)

* chore: fix tests

---------

Co-authored-by: Anand Baburajan <anandbaburajan@gmail.com>

erpnext/assets/doctype/asset/asset.py

@@ -40,6 +40,7 @@ def validate(self):
 		self.validate_item()
 		self.validate_cost_center()
 		self.set_missing_values()
+		self.validate_finance_books()
 		if not self.split_from:
 			self.prepare_depreciation_data()
 		self.validate_gross_and_purchase_amount()
@@ -206,6 +207,27 @@ def set_missing_values(self):
 			finance_books = get_item_details(self.item_code, self.asset_category)
 			self.set("finance_books", finance_books)
 
+	def validate_finance_books(self):
+		if not self.calculate_depreciation or len(self.finance_books) == 1:
+			return
+
+		finance_books = set()
+
+		for d in self.finance_books:
+			if d.finance_book in finance_books:
+				frappe.throw(
+					_("Row #{}: Please use a different Finance Book.").format(d.idx),
+					title=_("Duplicate Finance Book"),
+				)
+			else:
+				finance_books.add(d.finance_book)
+
+			if not d.finance_book:
+				frappe.throw(
+					_("Row #{}: Finance Book should not be empty since you're using multiple.").format(d.idx),
+					title=_("Missing Finance Book"),
+				)
+
 	def validate_asset_values(self):
 		if not self.asset_category:
 			self.asset_category = frappe.get_cached_value("Item", self.item_code, "asset_category")

erpnext/assets/doctype/asset/test_asset.py

@@ -1332,6 +1332,7 @@ def test_clear_depreciation_schedule_for_multiple_finance_books(self):
 		asset.append(
 			"finance_books",
 			{
+				"finance_book": "Test Finance Book 1",
 				"depreciation_method": "Straight Line",
 				"frequency_of_depreciation": 1,
 				"total_number_of_depreciations": 3,
@@ -1342,6 +1343,7 @@ def test_clear_depreciation_schedule_for_multiple_finance_books(self):
 		asset.append(
 			"finance_books",
 			{
+				"finance_book": "Test Finance Book 2",
 				"depreciation_method": "Straight Line",
 				"frequency_of_depreciation": 1,
 				"total_number_of_depreciations": 6,
@@ -1352,6 +1354,7 @@ def test_clear_depreciation_schedule_for_multiple_finance_books(self):
 		asset.append(
 			"finance_books",
 			{
+				"finance_book": "Test Finance Book 3",
 				"depreciation_method": "Straight Line",
 				"frequency_of_depreciation": 12,
 				"total_number_of_depreciations": 3,
@@ -1381,6 +1384,7 @@ def test_depreciation_schedules_are_set_up_for_multiple_finance_books(self):
 		asset.append(
 			"finance_books",
 			{
+				"finance_book": "Test Finance Book 1",
 				"depreciation_method": "Straight Line",
 				"frequency_of_depreciation": 12,
 				"total_number_of_depreciations": 3,
@@ -1391,6 +1395,7 @@ def test_depreciation_schedules_are_set_up_for_multiple_finance_books(self):
 		asset.append(
 			"finance_books",
 			{
+				"finance_book": "Test Finance Book 2",
 				"depreciation_method": "Straight Line",
 				"frequency_of_depreciation": 12,
 				"total_number_of_depreciations": 6,
@@ -1647,6 +1652,15 @@ def create_asset_data():
 	if not frappe.db.exists("Location", "Test Location"):
 		frappe.get_doc({"doctype": "Location", "location_name": "Test Location"}).insert()
 
+	if not frappe.db.exists("Finance Book", "Test Finance Book 1"):
+		frappe.get_doc({"doctype": "Finance Book", "finance_book_name": "Test Finance Book 1"}).insert()
+
+	if not frappe.db.exists("Finance Book", "Test Finance Book 2"):
+		frappe.get_doc({"doctype": "Finance Book", "finance_book_name": "Test Finance Book 2"}).insert()
+
+	if not frappe.db.exists("Finance Book", "Test Finance Book 3"):
+		frappe.get_doc({"doctype": "Finance Book", "finance_book_name": "Test Finance Book 3"}).insert()
+
 
 def create_asset(**args):
 	args = frappe._dict(args)