Allow overriding of Celery task kwargs

HISTORY.rst

@@ -6,6 +6,7 @@ not released yet
 ----------------
 
 * Fix documentation
+* Allow overriding of Celery task kwargs (see ``_get_celery_task_kwargs()`` method)
 
 0.2.2 (2020-02-11)
 ------------------

example/tests/test_receivers.py

@@ -47,8 +47,17 @@ def test_receiver_should_pass_serialized_kwargs_to_celery_task(self):
         receiver.receive(self.signal_kwargs)
         commit()
 
-        receiver.celery_task.delay.assert_called_once_with(
-            'unittest.mock.MagicMock',
-            'pynotify.serializers.ModelSerializer',
-            receiver.serializer_class().serialize(self.signal_kwargs),
+        receiver.celery_task.delay.assert_called_with(
+            handler_class='unittest.mock.MagicMock',
+            serializer_class='pynotify.serializers.ModelSerializer',
+            signal_kwargs=receiver.serializer_class().serialize(self.signal_kwargs),
         )
+
+    @override_settings(PYNOTIFY_CELERY_TASK='tests.test_receivers.mock_task')
+    def test_receiver_should_allow_overriding_of_celery_task_kwargs(self):
+        receiver = AsynchronousReceiver(MagicMock)
+        receiver._get_celery_task_kwargs = MagicMock(return_value={'abc': 1})
+        receiver.receive(self.signal_kwargs)
+        commit()
+
+        receiver.celery_task.delay.assert_called_with(abc=1)

pynotify/receivers.py

@@ -51,11 +51,15 @@ def _get_celery_task(self):
              )
         return locate(celery_task)
 
+    def _get_celery_task_kwargs(self):
+        return {
+            'handler_class': get_import_path(self.handler_class),
+            'serializer_class': get_import_path(self.serializer_class),
+            'signal_kwargs': self.serializer_class().serialize(self.signal_kwargs),
+        }
+
     def receive(self, signal_kwargs):
+        self.signal_kwargs = signal_kwargs
         # Call of the Celery task should be performed after current DB transaction is commited to avoid race condition,
         # e.g. accessing referenced object in the task before it has finished saving into DB.
-        on_commit(lambda: self.celery_task.delay(
-            get_import_path(self.handler_class),
-            get_import_path(self.serializer_class),
-            self.serializer_class().serialize(signal_kwargs),
-        ))
+        on_commit(lambda: self.celery_task.delay(**self._get_celery_task_kwargs()))