fix: item variant with manufacturer (backport #38845) (#38847)

* fix: item variant with manufacturer (#38845)

(cherry picked from commit e0c8ff1)

* chore: fix test case

---------

Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com>

erpnext/controllers/item_variant.py

@@ -56,10 +56,24 @@ def make_variant_based_on_manufacturer(template, manufacturer, manufacturer_part
 
 	copy_attributes_to_variant(template, variant)
 
-	variant.manufacturer = manufacturer
-	variant.manufacturer_part_no = manufacturer_part_no
-
 	variant.item_code = append_number_if_name_exists("Item", template.name)
+	variant.flags.ignore_mandatory = True
+	variant.save()
+
+	if not frappe.db.exists(
+		"Item Manufacturer", {"item_code": variant.name, "manufacturer": manufacturer}
+	):
+		manufacturer_doc = frappe.new_doc("Item Manufacturer")
+		manufacturer_doc.update(
+			{
+				"item_code": variant.name,
+				"manufacturer": manufacturer,
+				"manufacturer_part_no": manufacturer_part_no,
+			}
+		)
+
+		manufacturer_doc.flags.ignore_mandatory = True
+		manufacturer_doc.save(ignore_permissions=True)
 
 	return variant
 

erpnext/stock/doctype/item/test_item.py

@@ -522,39 +522,25 @@ def test_uom_conv_base_case(self):
 		self.assertEqual(factor, 1.0)
 
 	def test_item_variant_by_manufacturer(self):
-		fields = [{"field_name": "description"}, {"field_name": "variant_based_on"}]
-		set_item_variant_settings(fields)
+		template = make_item(
+			"_Test Item Variant By Manufacturer", {"has_variants": 1, "variant_based_on": "Manufacturer"}
+		).name
 
-		if frappe.db.exists("Item", "_Test Variant Mfg"):
-			frappe.delete_doc("Item", "_Test Variant Mfg")
-		if frappe.db.exists("Item", "_Test Variant Mfg-1"):
-			frappe.delete_doc("Item", "_Test Variant Mfg-1")
-		if frappe.db.exists("Manufacturer", "MSG1"):
-			frappe.delete_doc("Manufacturer", "MSG1")
-
-		template = frappe.get_doc(
-			dict(
-				doctype="Item",
-				item_code="_Test Variant Mfg",
-				has_variant=1,
-				item_group="Products",
-				variant_based_on="Manufacturer",
-			)
-		).insert()
+		for manufacturer in ["DFSS", "DASA", "ASAAS"]:
+			if not frappe.db.exists("Manufacturer", manufacturer):
+				m_doc = frappe.new_doc("Manufacturer")
+				m_doc.short_name = manufacturer
+				m_doc.insert()
 
-		manufacturer = frappe.get_doc(dict(doctype="Manufacturer", short_name="MSG1")).insert()
+		self.assertFalse(frappe.db.exists("Item Manufacturer", {"manufacturer": "DFSS"}))
+		variant = get_variant(template, manufacturer="DFSS", manufacturer_part_no="DFSS-123")
 
-		variant = get_variant(template.name, manufacturer=manufacturer.name)
-		self.assertEqual(variant.item_code, "_Test Variant Mfg-1")
-		self.assertEqual(variant.description, "_Test Variant Mfg")
-		self.assertEqual(variant.manufacturer, "MSG1")
-		variant.insert()
+		item_manufacturer = frappe.db.exists(
+			"Item Manufacturer", {"manufacturer": "DFSS", "item_code": variant.name}
+		)
+		self.assertTrue(item_manufacturer)
 
-		variant = get_variant(template.name, manufacturer=manufacturer.name, manufacturer_part_no="007")
-		self.assertEqual(variant.item_code, "_Test Variant Mfg-2")
-		self.assertEqual(variant.description, "_Test Variant Mfg")
-		self.assertEqual(variant.manufacturer, "MSG1")
-		self.assertEqual(variant.manufacturer_part_no, "007")
+		frappe.delete_doc("Item Manufacturer", item_manufacturer)
 
 	def test_stock_exists_against_template_item(self):
 		stock_item = frappe.get_all("Stock Ledger Entry", fields=["item_code"], limit=1)