update sync data from site dashboard and testing closing cycles

backend/apps/operations/tests.py

@@ -83,6 +83,26 @@ class OperationsAPITests(TestCase):
         self.assertEqual(len(results), 1)
         self.assertEqual(results[0]["date"], date.today().isoformat())
 
+    def test_panel_iot_active_cycle_null_end_date_does_not_500(self):
+        """Active cycles have end_date=None; filtering must not raise ValueError."""
+        self.cycle.end_date = None
+        self.cycle.status = Cycle.STATUS_ACTIVE
+        self.cycle.save(update_fields=["end_date", "status", "updated_at"])
+        IotPanel.objects.create(
+            flock=self.flock,
+            date=date.today(),
+            average_temperature=27.0,
+        )
+        response = self.client.get(
+            "/api/v1/panel-iot/dates/",
+            {"cycle_id": self.cycle.pk, "flock_id": self.flock.pk},
+        )
+        self.assertEqual(response.status_code, 200, response.data)
+        iso_dates = [
+            d.isoformat() if hasattr(d, "isoformat") else str(d) for d in response.data
+        ]
+        self.assertIn(date.today().isoformat(), iso_dates)
+
     def test_panel_iot_filters_by_flock(self):
         flock_b = Flock.objects.create(flock_name="Flock B", kandang=self.kandang)
         row = IotPanel.objects.create(