fix: pricing rule for non stock UOM and conversions

* fix: pricing rule for non stock UOM and conversions

erpnext/accounts/doctype/pricing_rule/pricing_rule.py

@@ -268,6 +268,18 @@ def get_serial_no_for_item(args):
 	return item_details
 
 
+def update_pricing_rule_uom(pricing_rule, args):
+	child_doc = {"Item Code": "items", "Item Group": "item_groups", "Brand": "brands"}.get(
+		pricing_rule.apply_on
+	)
+
+	apply_on_field = frappe.scrub(pricing_rule.apply_on)
+
+	for row in pricing_rule.get(child_doc):
+		if row.get(apply_on_field) == args.get(apply_on_field):
+			pricing_rule.uom = row.uom
+
+
 def get_pricing_rule_for_item(args, price_list_rate=0, doc=None, for_validate=False):
 	from erpnext.accounts.doctype.pricing_rule.utils import (
 		get_applied_pricing_rules,
@@ -324,6 +336,7 @@ def get_pricing_rule_for_item(args, price_list_rate=0, doc=None, for_validate=Fa
 
 			if isinstance(pricing_rule, str):
 				pricing_rule = frappe.get_cached_doc("Pricing Rule", pricing_rule)
+				update_pricing_rule_uom(pricing_rule, args)
 				pricing_rule.apply_rule_on_other_items = get_pricing_rule_items(pricing_rule) or []
 
 			if pricing_rule.get("suggestion"):
@@ -440,12 +453,15 @@ def apply_price_discount_rule(pricing_rule, item_details, args):
 		if pricing_rule.currency == args.currency:
 			pricing_rule_rate = pricing_rule.rate
 
+		# TODO https://github.com/frappe/erpnext/pull/23636 solve this in some other way.
 		if pricing_rule_rate:
+			is_blank_uom = pricing_rule.get("uom") != args.get("uom")
 			# Override already set price list rate (from item price)
 			# if pricing_rule_rate > 0
 			item_details.update(
 				{
-					"price_list_rate": pricing_rule_rate * args.get("conversion_factor", 1),
+					"price_list_rate": pricing_rule_rate
+					* (args.get("conversion_factor", 1) if is_blank_uom else 1),
 				}
 			)
 		item_details.update({"discount_percentage": 0.0})

erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py

@@ -595,6 +595,121 @@ class TestPricingRule(unittest.TestCase):
 		frappe.get_doc("Item Price", {"item_code": "Water Flask"}).delete()
 		item.delete()
 
+	def test_item_price_with_blank_uom_pricing_rule(self):
+		properties = {
+			"item_code": "Item Blank UOM",
+			"stock_uom": "Nos",
+			"sales_uom": "Box",
+			"uoms": [dict(uom="Box", conversion_factor=10)],
+		}
+		item = make_item(properties=properties)
+
+		make_item_price("Item Blank UOM", "_Test Price List", 100)
+
+		pricing_rule_record = {
+			"doctype": "Pricing Rule",
+			"title": "_Test Item Blank UOM Rule",
+			"apply_on": "Item Code",
+			"items": [
+				{
+					"item_code": "Item Blank UOM",
+				}
+			],
+			"selling": 1,
+			"currency": "INR",
+			"rate_or_discount": "Rate",
+			"rate": 101,
+			"company": "_Test Company",
+		}
+		rule = frappe.get_doc(pricing_rule_record)
+		rule.insert()
+
+		si = create_sales_invoice(
+			do_not_save=True, item_code="Item Blank UOM", uom="Box", conversion_factor=10
+		)
+		si.selling_price_list = "_Test Price List"
+		si.save()
+
+		# If UOM is blank consider it as stock UOM and apply pricing_rule on all UOM.
+		# rate is 101, Selling UOM is Box that have conversion_factor of 10 so 101 * 10 = 1010
+		self.assertEqual(si.items[0].price_list_rate, 1010)
+		self.assertEqual(si.items[0].rate, 1010)
+
+		si.delete()
+
+		si = create_sales_invoice(do_not_save=True, item_code="Item Blank UOM", uom="Nos")
+		si.selling_price_list = "_Test Price List"
+		si.save()
+
+		# UOM is blank so consider it as stock UOM and apply pricing_rule on all UOM.
+		# rate is 101, Selling UOM is Nos that have conversion_factor of 1 so 101 * 1 = 101
+		self.assertEqual(si.items[0].price_list_rate, 101)
+		self.assertEqual(si.items[0].rate, 101)
+
+		si.delete()
+		rule.delete()
+		frappe.get_doc("Item Price", {"item_code": "Item Blank UOM"}).delete()
+
+		item.delete()
+
+	def test_item_price_with_selling_uom_pricing_rule(self):
+		properties = {
+			"item_code": "Item UOM other than Stock",
+			"stock_uom": "Nos",
+			"sales_uom": "Box",
+			"uoms": [dict(uom="Box", conversion_factor=10)],
+		}
+		item = make_item(properties=properties)
+
+		make_item_price("Item UOM other than Stock", "_Test Price List", 100)
+
+		pricing_rule_record = {
+			"doctype": "Pricing Rule",
+			"title": "_Test Item UOM other than Stock Rule",
+			"apply_on": "Item Code",
+			"items": [
+				{
+					"item_code": "Item UOM other than Stock",
+					"uom": "Box",
+				}
+			],
+			"selling": 1,
+			"currency": "INR",
+			"rate_or_discount": "Rate",
+			"rate": 101,
+			"company": "_Test Company",
+		}
+		rule = frappe.get_doc(pricing_rule_record)
+		rule.insert()
+
+		si = create_sales_invoice(
+			do_not_save=True, item_code="Item UOM other than Stock", uom="Box", conversion_factor=10
+		)
+		si.selling_price_list = "_Test Price List"
+		si.save()
+
+		# UOM is Box so apply pricing_rule only on Box UOM.
+		# Selling UOM is Box and as both UOM are same no need to multiply by conversion_factor.
+		self.assertEqual(si.items[0].price_list_rate, 101)
+		self.assertEqual(si.items[0].rate, 101)
+
+		si.delete()
+
+		si = create_sales_invoice(do_not_save=True, item_code="Item UOM other than Stock", uom="Nos")
+		si.selling_price_list = "_Test Price List"
+		si.save()
+
+		# UOM is Box so pricing_rule won't apply as selling_uom is Nos.
+		# As Pricing Rule is not applied price of 100 will be fetched from Item Price List.
+		self.assertEqual(si.items[0].price_list_rate, 100)
+		self.assertEqual(si.items[0].rate, 100)
+
+		si.delete()
+		rule.delete()
+		frappe.get_doc("Item Price", {"item_code": "Item UOM other than Stock"}).delete()
+
+		item.delete()
+
 	def test_pricing_rule_for_different_currency(self):
 		make_item("Test Sanitizer Item")
 

erpnext/accounts/doctype/pricing_rule/utils.py

@@ -111,6 +111,12 @@ def _get_pricing_rules(apply_on, args, values):
 		)
 
 		if apply_on_field == "item_code":
+			if args.get("uom", None):
+				item_conditions += (
+					" and ({child_doc}.uom='{item_uom}' or IFNULL({child_doc}.uom, '')='')".format(
+						child_doc=child_doc, item_uom=args.get("uom")
+					)
+				)
 			if "variant_of" not in args:
 				args.variant_of = frappe.get_cached_value("Item", args.item_code, "variant_of")
 

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -3320,7 +3320,7 @@ def create_sales_invoice(**args):
 			"asset": args.asset or None,
 			"cost_center": args.cost_center or "_Test Cost Center - _TC",
 			"serial_no": args.serial_no,
-			"conversion_factor": 1,
+			"conversion_factor": args.get("conversion_factor", 1),
 			"incoming_rate": args.incoming_rate or 0,
 			"batch_no": args.batch_no or None,
 		},

erpnext/public/js/controllers/transaction.js

@@ -426,6 +426,7 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 			if(!this.validate_company_and_party()) {
 				this.frm.fields_dict["items"].grid.grid_rows[item.idx - 1].remove();
 			} else {
+				item.pricing_rules = ''
 				return this.frm.call({
 					method: "erpnext.stock.get_item_details.get_item_details",
 					child: item,
@@ -1045,6 +1046,7 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 	uom(doc, cdt, cdn) {
 		var me = this;
 		var item = frappe.get_doc(cdt, cdn);
+		item.pricing_rules = ''
 		if(item.item_code && item.uom) {
 			return this.frm.call({
 				method: "erpnext.stock.get_item_details.get_conversion_factor",
@@ -1121,6 +1123,7 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 
 	qty(doc, cdt, cdn) {
 		let item = frappe.get_doc(cdt, cdn);
+		item.pricing_rules = ''
 		this.conversion_factor(doc, cdt, cdn, true);
 		this.calculate_stock_uom_rate(doc, cdt, cdn);
 		this.apply_pricing_rule(item, true);