feat: Enhance autoname functionality (#36827)

* feat: Enhance autoname functionality to support expression naming rules with and without dots before dashes

* style: Fix formatting issues

---------

Co-authored-by: Suraj Shetty <surajshetty3416@gmail.com>

frappe/model/naming.py

@@ -230,7 +230,22 @@ def set_name_from_naming_options(autoname, doc):
 	elif _autoname.startswith("format:"):
 		doc.name = _format_autoname(autoname, doc)
 	elif "#" in autoname:
-		doc.name = make_autoname(autoname, doc=doc)
+		# For Expression naming rule, first replace braced params, then normalize, then process series
+		# This handles patterns like {full_name}-{description}-.#####
+		def get_param_value_for_match(match):
+			param = match.group()
+			return parse_naming_series([param[1:-1]], doc=doc)
+
+		# Replace braced params first
+		name_with_params = BRACED_PARAMS_PATTERN.sub(get_param_value_for_match, autoname)
+
+		# Normalize pattern: convert '-.#####' to '.-.#####' to support both formats
+		# This handles cases like {fieldname}-.##### (without dot before dash)
+		# Pattern matches: dash followed by dot followed by one or more hashes, but only if not preceded by a dot
+		normalized_autoname = re.sub(r"(?<!\.)(-\.#+)", r".\1", name_with_params)
+
+		# Process the series
+		doc.name = make_autoname(normalized_autoname, doc=doc)
 
 
 def set_naming_from_document_naming_rule(doc):
@@ -584,11 +599,19 @@ def _format_autoname(autoname: str, doc):
 	Independent of remaining string or separators.
 
 	Example pattern: 'format:LOG-{MM}-{fieldname1}-{fieldname2}-{#####}'
+	Supports both patterns:
+	- {fieldname}.-.##### (with dot before dash)
+	- {fieldname}-.##### (without dot before dash)
 	"""
 
 	first_colon_index = autoname.find(":")
 	autoname_value = autoname[first_colon_index + 1 :]
 
+	# Normalize pattern: convert '-.#####' to '.-.#####' to support both formats
+	# This handles cases like {fieldname}-.##### (without dot before dash)
+	# Pattern matches: dash followed by dot followed by one or more hashes, but only if not preceded by a dot
+	autoname_value = re.sub(r"(?<!\.)(-\.#+)", r".\1", autoname_value)
+
 	def get_param_value_for_match(match):
 		param = match.group()
 		return parse_naming_series([param[1:-1]], doc=doc)
@@ -596,4 +619,8 @@ def _format_autoname(autoname: str, doc):
 	# Replace braced params with their parsed value
 	name = BRACED_PARAMS_PATTERN.sub(get_param_value_for_match, autoname_value)
 
+	# If the result still contains unbraced hash patterns (like .#####), process them as naming series
+	if "#" in name and "{" not in name:
+		name = make_autoname(name, doc=doc)
+
 	return name

frappe/tests/test_naming.py

@@ -148,6 +148,64 @@ class TestNaming(IntegrationTestCase):
 
 		self.assertEqual(todo.name, f"TODO-{week}-{series}")
 
+	def test_expression_autoname_multiple_fields_pattern_without_dot_before_dash(self):
+		"""
+		Test Expression naming rule: {field_1}-{field_2}-.#####
+		Should produce: field_1-field_2-00001
+		"""
+		doctype = new_doctype(
+			fields=[
+				{"fieldname": "test_field_a", "fieldtype": "Data", "label": "Test Field A"},
+				{"fieldname": "test_field_b", "fieldtype": "Data", "label": "Test Field B"},
+			],
+			autoname="{test_field_a}-{test_field_b}-.#####",
+		).insert()
+
+		test_field_a = "Sumit"
+		test_field_b = "Jain"
+
+		doc = frappe.new_doc(doctype.name)
+		doc.test_field_a = test_field_a
+		doc.test_field_b = test_field_b
+		doc.insert()
+
+		series = getseries(f"{test_field_a}-{test_field_b}-", 5)
+		series = int(series) - 1
+
+		self.assertEqual(doc.name, f"{test_field_a}-{test_field_b}-{series:05d}")
+
+		doc.delete()
+		doctype.delete()
+
+	def test_expression_autoname_multiple_fields_pattern_with_dots_between_fields(self):
+		"""
+		Test Expression naming rule: {field_1}.-.{field_2}.-.#####
+		Should produce: field_1-field_2-00001 (same as pattern without dots)
+		"""
+		doctype = new_doctype(
+			fields=[
+				{"fieldname": "test_field_x", "fieldtype": "Data", "label": "Test Field X"},
+				{"fieldname": "test_field_y", "fieldtype": "Data", "label": "Test Field Y"},
+			],
+			autoname="{test_field_x}.-.{test_field_y}.-.#####",
+		).insert()
+
+		test_field_x = "Sumit"
+		test_field_y = "Jain"
+
+		doc = frappe.new_doc(doctype.name)
+		doc.test_field_x = test_field_x
+		doc.test_field_y = test_field_y
+		doc.insert()
+
+		series = getseries(f"{test_field_x}-{test_field_y}-", 5)
+		series = int(series) - 1
+
+		self.assertEqual(doc.name, f"{test_field_x}-{test_field_y}-{series:05d}")
+
+		doc.delete()
+		doctype.delete()
+
 	def test_revert_series(self):
 		from datetime import datetime