test: item price on remove pricing rule

erpnext/accounts/doctype/pricing_rule/pricing_rule.py

@@ -423,6 +423,7 @@ def remove_pricing_rule_for_item(pricing_rules, item_details, item_code=None):
 			item_details.applied_on_items = ','.join(items)
 
 	item_details.pricing_rules = ''
+	item_details.pricing_rule_removed = True
 
 	return item_details
 

erpnext/accounts/doctype/pricing_rule/test_pricing_rule.py

@@ -628,6 +628,47 @@ class TestPricingRule(unittest.TestCase):
 		for doc in [si, si1]:
 			doc.delete()
 
+	def test_remove_pricing_rule(self):
+		item = make_item("Water Flask")
+		make_item_price("Water Flask", "_Test Price List", 100)
+
+		pricing_rule_record = {
+			"doctype": "Pricing Rule",
+			"title": "_Test Water Flask Rule",
+			"apply_on": "Item Code",
+			"price_or_product_discount": "Price",
+			"items": [{
+				"item_code": "Water Flask",
+			}],
+			"selling": 1,
+			"currency": "INR",
+			"rate_or_discount": "Discount Percentage",
+			"discount_percentage": 20,
+			"company": "_Test Company"
+		}
+		rule = frappe.get_doc(pricing_rule_record)
+		rule.insert()
+
+		si = create_sales_invoice(do_not_save=True, item_code="Water Flask")
+		si.selling_price_list = "_Test Price List"
+		si.save()
+
+		self.assertEqual(si.items[0].price_list_rate, 100)
+		self.assertEqual(si.items[0].discount_percentage, 20)
+		self.assertEqual(si.items[0].rate, 80)
+
+		si.ignore_pricing_rule = 1
+		si.save()
+
+		self.assertEqual(si.items[0].discount_percentage, 0)
+		self.assertEqual(si.items[0].rate, 100)
+
+		si.delete()
+		rule.delete()
+		frappe.get_doc("Item Price", {"item_code": "Water Flask"}).delete()
+		item.delete()
+
+
 test_dependencies = ["Campaign"]
 
 def make_pricing_rule(**args):

erpnext/controllers/accounts_controller.py

@@ -402,6 +402,14 @@ class AccountsController(TransactionBase):
 								if item_qty != len(get_serial_nos(item.get('serial_no'))):
 									item.set(fieldname, value)
 
+							elif ret.get("pricing_rule_removed") and value is not None \
+								and fieldname in [
+									'discount_percentage', 'discount_amount', 'rate',
+									'margin_rate_or_amount', 'margin_type', 'remove_free_item'
+								]:
+								# reset pricing rule fields if pricing_rule_removed
+								item.set(fieldname, value)
+
 					if self.doctype in ["Purchase Invoice", "Sales Invoice"] and item.meta.get_field('is_fixed_asset'):
 						item.set('is_fixed_asset', ret.get('is_fixed_asset', 0))