fix: show validation message before changing shift start time

hrms/hr/doctype/shift_type/shift_type.py

@@ -6,6 +6,7 @@
 from itertools import groupby
 
 import frappe
+from frappe import _
 from frappe.model.document import Document
 from frappe.utils import cint, create_batch, get_datetime, get_time, getdate
 
@@ -25,6 +26,22 @@
 
 
 class ShiftType(Document):
+	def validate(self):
+		if self.is_field_modified("start_time") and self.unlinked_checkins_exist():
+			frappe.throw(
+				title=_("Unmarked Check-in Logs Found"),
+				msg=_("Mark attendance for exsiting check-in/out logs before changing shift settings"),
+			)
+
+	def is_field_modified(self, fieldname):
+		return not self.is_new() and self.has_value_changed(fieldname)
+
+	def unlinked_checkins_exist(self):
+		return frappe.db.exists(
+			"Employee Checkin",
+			{"shift": self.name, "attendance": ["is", "not set"], "skip_auto_attendance": 0},
+		)
+
 	@frappe.whitelist()
 	def process_auto_attendance(self):
 		if (

hrms/hr/doctype/shift_type/test_shift_type.py

@@ -688,6 +688,42 @@ def test_mark_attendance_for_default_shift_when_shift_assignment_is_not_overlapp
 			"Absent",
 		)
 
+	def test_validation_for_unlinked_logs_before_changing_important_shift_configuration(self):
+		# the important shift configuration is start time, it is used to sort logs chronologically
+		shift = setup_shift_type(shift_type="Test Shift", start_time="10:00:00", end_time="18:00:00")
+		employee = make_employee(
+			"[email protected]", company="_Test Company", default_shift=shift.name
+		)
+
+		from hrms.hr.doctype.employee_checkin.test_employee_checkin import make_checkin
+
+		in_time = datetime.combine(getdate(), get_time("10:00:00"))
+		check_in = make_checkin(employee, in_time)
+		check_in.fetch_shift()
+		# Case 1: raise valdiation error if shift time is being changed and checkin logs exists
+		shift.start_time = get_time("10:15:00")
+		self.assertRaises(frappe.ValidationError, shift.save)
+
+		# don't raise validation error if something else is being changed
+		# even if checkin logs exists, it's probably fine
+		shift.reload()
+		shift.begin_check_in_before_shift_start_time = 120
+		shift.save()
+		self.assertEqual(
+			frappe.get_value("Shift Type", shift.name, "begin_check_in_before_shift_start_time"), 120
+		)
+		out_time = datetime.combine(getdate(), get_time("18:00:00"))
+		check_out = make_checkin(employee, out_time)
+		check_out.fetch_shift()
+		shift.process_auto_attendance()
+
+		# Case 2: allow shift time to change if no unlinked logs exist
+		shift.start_time = get_time("10:15:00")
+		shift.save()
+		self.assertEqual(
+			get_time(frappe.get_value("Shift Type", shift.name, "start_time")), get_time("10:15:00")
+		)
+
 
 def setup_shift_type(**args):
 	args = frappe._dict(args)