Add setting CELERY_HAYSTACK_IGNORE_RESULT

If True, results of the signal handler task will not be written to any
result store to not produce large amounts of irrelevant results.

Errors will still be stored.

celery_haystack/conf.py

@@ -20,6 +20,8 @@ class CeleryHaystack(AppConf):
     QUEUE = None
     #: Whether the task should be handled transaction safe
     TRANSACTION_SAFE = True
+    #: Whether the task results should be ignored
+    IGNORE_RESULT = False
 
     #: The batch size used by the CeleryHaystackUpdateIndex task
     COMMAND_BATCH_SIZE = None

celery_haystack/tasks.py

@@ -17,6 +17,8 @@ class CeleryHaystackSignalHandler(Task):
     using = settings.CELERY_HAYSTACK_DEFAULT_ALIAS
     max_retries = settings.CELERY_HAYSTACK_MAX_RETRIES
     default_retry_delay = settings.CELERY_HAYSTACK_RETRY_DELAY
+    ignore_result = settings.CELERY_HAYSTACK_IGNORE_RESULT
+    store_errors_even_if_ignored = True
 
     def split_identifier(self, identifier, **kwargs):
         """