[fix] Fixed tests

openwisp_monitoring/device/api/views.py

@@ -114,6 +114,7 @@ class DeviceMetricView(
     queryset = (
         DeviceData.objects.filter(organization__is_active=True)
         .only(
+            '_is_deactivated',
             'id',
             'key',
         )

openwisp_monitoring/device/apps.py

@@ -155,6 +155,11 @@ def connect_device_signals(self):
             sender=Device,
             dispatch_uid='device_deactivated_update_devicemonitoring',
         )
+        device_deactivated.connect(
+            DeviceMetricView.invalidate_get_device_cache,
+            sender=Device,
+            dispatch_uid=('device_deactivated_invalidate_view_device_cache'),
+        )
 
     @classmethod
     def device_post_save_receiver(cls, instance, created, **kwargs):

openwisp_monitoring/device/tests/test_api.py

@@ -187,6 +187,11 @@ def test_deactivated_device_read_only(self):
         response = self.client.get(self._url(device.pk, device.key))
         self.assertEqual(response.status_code, 200)
 
+        # Post should work after the device is activated
+        device.activate()
+        response = self._post_data(device.id, device.key, {'type': 'DeviceMonitoring'})
+        self.assertEqual(response.status_code, 200)
+
     @patch('openwisp_monitoring.device.tasks.write_device_metrics.delay')
     def test_background_write(self, mocked_task):
         device = self._create_device(organization=self._create_org())