fix(stock): propagate renamed attribute values to variant items

erpnext/controllers/item_variant.py

@@ -129,6 +129,49 @@ def validate_is_incremental(numeric_attribute, attribute, value, item):
 		)
 
 
+def get_attribute_value_renames(item_attribute):
+	"""Return old to new attribute value mappings for renamed Item Attribute Value rows."""
+	if item_attribute.numeric_values:
+		return {}
+
+	db_value = item_attribute.get_doc_before_save()
+	if not db_value:
+		return {}
+
+	old_values = {d.name: d.attribute_value for d in db_value.item_attribute_values}
+	renames = {}
+
+	for row in item_attribute.item_attribute_values:
+		if row.name in old_values and old_values[row.name] != row.attribute_value:
+			renames[old_values[row.name]] = row.attribute_value
+
+	return renames
+
+
+def update_variant_attribute_values(item_attribute):
+	"""Propagate renamed Item Attribute Values to Item Variant Attribute on variant items."""
+	value_map = get_attribute_value_renames(item_attribute)
+	if not value_map:
+		return
+
+	item_variant_table = frappe.qb.DocType("Item Variant Attribute")
+	item_table = frappe.qb.DocType("Item")
+
+	for old_value, new_value in value_map.items():
+		(
+			frappe.qb.update(item_variant_table)
+			.join(item_table)
+			.on(item_table.name == item_variant_table.parent)
+			.set(item_variant_table.attribute_value, new_value)
+			.where(item_table.variant_of.isnotnull())
+			.where(item_table.variant_of != "")
+			.where(item_variant_table.attribute == item_attribute.name)
+			.where(item_variant_table.attribute_value == old_value)
+		).run()
+
+	frappe.flags.attribute_values = None
+
+
 def validate_item_attribute_value(attributes_list, attribute, attribute_value, item, from_variant=True):
 	allow_rename_attribute_value = frappe.db.get_single_value(
 		"Item Variant Settings", "allow_rename_attribute_value"